从数据库表生成类

我怎样才能从一个SQL Server表中生成一个类？

我不是在谈论使用一些ORM。 我只需要创build实体（简单的类）。 就像是：

public class Person { public string Name { get;set; } public string Phone { get;set; } } 

Answer 1

将@TableName设置为您的表的名称。

 declare @TableName sysname = 'TableName' declare @Result varchar(max) = 'public class ' + @TableName + ' {' select @Result = @Result + ' public ' + ColumnType + NullableSign + ' ' + ColumnName + ' { get; set; } ' from ( select replace(col.name, ' ', '_') ColumnName, column_id ColumnId, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'bool' when 'char' then 'string' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'int' when 'money' then 'decimal' when 'nchar' then 'string' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'string' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'string' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' else 'UNKNOWN_' + typ.name end ColumnType, case when col.is_nullable = 1 and typ.name in ('bigint', 'bit', 'date', 'datetime', 'datetime2', 'datetimeoffset', 'decimal', 'float', 'int', 'money', 'numeric', 'real', 'smalldatetime', 'smallint', 'smallmoney', 'time', 'tinyint', 'uniqueidentifier') then '?' else '' end NullableSign from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id where object_id = object_id(@TableName) ) t order by ColumnId set @Result = @Result + ' }' print @Result 

Answer 2

我无法得到亚历克斯的答案在Sql Server 2008 R2上工作。 所以，我用相同的基本原则重写了它。 它现在允许模式，并且为列属性映射（包括将可空的datetypes映射为可为空的C＃值types）进行了一些修复。 这里是Sql：

 DECLARE @TableName VARCHAR(MAX) = 'NewsItem' -- Replace 'NewsItem' with your table name DECLARE @TableSchema VARCHAR(MAX) = 'Markets' -- Replace 'Markets' with your schema name DECLARE @result varchar(max) = '' SET @result = @result + 'using System;' + CHAR(13) + CHAR(13) IF (@TableSchema IS NOT NULL) BEGIN SET @result = @result + 'namespace ' + @TableSchema + CHAR(13) + '{' + CHAR(13) END SET @result = @result + 'public class ' + @TableName + CHAR(13) + '{' + CHAR(13) SET @result = @result + '#region Instance Properties' + CHAR(13) SELECT @result = @result + CHAR(13) + ' public ' + ColumnType + ' ' + ColumnName + ' { get; set; } ' + CHAR(13) FROM ( SELECT c.COLUMN_NAME AS ColumnName , CASE c.DATA_TYPE WHEN 'bigint' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Int64?' ELSE 'Int64' END WHEN 'binary' THEN 'Byte[]' WHEN 'bit' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Boolean?' ELSE 'Boolean' END WHEN 'char' THEN 'String' WHEN 'date' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'datetime' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'datetime2' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'datetimeoffset' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTimeOffset?' ELSE 'DateTimeOffset' END WHEN 'decimal' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END WHEN 'float' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Single?' ELSE 'Single' END WHEN 'image' THEN 'Byte[]' WHEN 'int' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Int32?' ELSE 'Int32' END WHEN 'money' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END WHEN 'nchar' THEN 'String' WHEN 'ntext' THEN 'String' WHEN 'numeric' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END WHEN 'nvarchar' THEN 'String' WHEN 'real' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Double?' ELSE 'Double' END WHEN 'smalldatetime' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'smallint' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Int16?' ELSE 'Int16'END WHEN 'smallmoney' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END WHEN 'text' THEN 'String' WHEN 'time' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'TimeSpan?' ELSE 'TimeSpan' END WHEN 'timestamp' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'tinyint' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Byte?' ELSE 'Byte' END WHEN 'uniqueidentifier' THEN 'Guid' WHEN 'varbinary' THEN 'Byte[]' WHEN 'varchar' THEN 'String' ELSE 'Object' END AS ColumnType , c.ORDINAL_POSITION FROM INFORMATION_SCHEMA.COLUMNS c WHERE c.TABLE_NAME = @TableName and ISNULL(@TableSchema, c.TABLE_SCHEMA) = c.TABLE_SCHEMA ) t ORDER BY t.ORDINAL_POSITION SET @result = @result + CHAR(13) + '#endregion Instance Properties' + CHAR(13) SET @result = @result + '}' + CHAR(13) IF (@TableSchema IS NOT NULL) BEGIN SET @result = @result + CHAR(13) + '}' END PRINT @result 

它生成C＃如下所示：

 using System; namespace Markets { public class NewsItem { #region Instance Properties public Int32 NewsItemID { get; set; } public Int32? TextID { get; set; } public String Description { get; set; } #endregion Instance Properties } } 

使用EF，Linq到Sql甚至脚手架可能是一个想法; 不过，有时候这样的编码就派上用场了。 这可能只是因为你的技术架构师不希望你使用EF等。 所以，你必须恢复到这样的代码…顺便说一下，也可能是一个想法，用DataAnnotations属性来装饰每个属性。

Answer 3

VB版本

 declare @TableName sysname = 'myTableName' declare @prop varchar(max) PRINT 'Public Class ' + @TableName declare props cursor for select distinct ' public property ' + ColumnName + ' AS ' + ColumnType AS prop from ( select replace(col.name, ' ', '_') ColumnName, column_id, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'boolean' when 'char' then 'string' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'integer' when 'money' then 'decimal' when 'nchar' then 'char' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'string' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'string' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' end ColumnType from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id where object_id = object_id(@TableName) ) t order by prop open props FETCH NEXT FROM props INTO @prop WHILE @@FETCH_STATUS = 0 BEGIN print @prop FETCH NEXT FROM props INTO @prop END close props DEALLOCATE props PRINT 'End Class' 

Answer 4

要打印出NULLABLE属性，使用这个。
它增加了对Alex Aza的CASE语句块脚本的轻微修改。

 declare @TableName sysname = 'TableName' declare @result varchar(max) = 'public class ' + @TableName + ' {' select @result = @result + ' public ' + ColumnType + ' ' + ColumnName + ' { get; set; } ' from ( select replace(col.name, ' ', '_') ColumnName, column_id, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'bool' when 'char' then 'string' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'int' when 'money' then 'decimal' when 'nchar' then 'char' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'string' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'string' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' else 'UNKNOWN_' + typ.name end + CASE WHEN col.is_nullable=1 AND typ.name NOT IN ( 'binary', 'varbinary', 'image', 'text', 'ntext', 'varchar', 'nvarchar', 'char', 'nchar') THEN '?' ELSE '' END AS [ColumnType] from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id where object_id = object_id(@TableName) ) t order by column_id set @result = @result + ' }' print @result 

Answer 5

我试图使用上面的build议，并在这个过程中改进了这个线程的解决scheme。

让我们说你使用一个实现PropertyChanged事件的基类（在这种情况下，ObservableObject），你会做这样的事情。 我可能会在我的博客sqljana.wordpress.com上写一篇博文

请replace前三个variables的值：

  --These three things have to be substituted (when called from Powershell, they are replaced before execution) DECLARE @Schema VARCHAR(MAX) = N'&Schema' DECLARE @TableName VARCHAR(MAX) = N'&TableName' DECLARE @Namespace VARCHAR(MAX) = N'&Namespace' DECLARE @CRLF VARCHAR(2) = CHAR(13) + CHAR(10); DECLARE @result VARCHAR(max) = ' ' DECLARE @PrivateProp VARCHAR(100) = @CRLF + CHAR(9) + CHAR(9) + 'private <ColumnType> _<ColumnName>;'; DECLARE @PublicProp VARCHAR(255) = @CRLF + CHAR(9) + CHAR(9) + 'public <ColumnType> <ColumnName> ' + @CRLF + CHAR(9) + CHAR(9) + '{ ' + @CRLF + CHAR(9) + CHAR(9) + ' get { return _<ColumnName>; } ' + @CRLF + CHAR(9) + CHAR(9) + ' set ' + @CRLF + CHAR(9) + CHAR(9) + ' { ' + @CRLF + CHAR(9) + CHAR(9) + ' _<ColumnName> = value;' + @CRLF + CHAR(9) + CHAR(9) + ' base.RaisePropertyChanged();' + @CRLF + CHAR(9) + CHAR(9) + ' } ' + @CRLF + CHAR(9) + CHAR(9) + '}' + @CRLF; DECLARE @RPCProc VARCHAR(MAX) = @CRLF + CHAR(9) + CHAR(9) + 'public event PropertyChangedEventHandler PropertyChanged; ' + @CRLF + CHAR(9) + CHAR(9) + 'private void RaisePropertyChanged( ' + @CRLF + CHAR(9) + CHAR(9) + ' [CallerMemberName] string caller = "" ) ' + @CRLF + CHAR(9) + CHAR(9) + '{ ' + @CRLF + CHAR(9) + CHAR(9) + ' if (PropertyChanged != null) ' + @CRLF + CHAR(9) + CHAR(9) + ' { ' + @CRLF + CHAR(9) + CHAR(9) + ' PropertyChanged( this, new PropertyChangedEventArgs( caller ) ); ' + @CRLF + CHAR(9) + CHAR(9) + ' } ' + @CRLF + CHAR(9) + CHAR(9) + '}'; DECLARE @PropChanged VARCHAR(200) = @CRLF + CHAR(9) + CHAR(9) + 'protected override void AfterPropertyChanged(string propertyName) ' + @CRLF + CHAR(9) + CHAR(9) + '{ ' + @CRLF + CHAR(9) + CHAR(9) + ' System.Diagnostics.Debug.WriteLine("' + @TableName + ' property changed: " + propertyName); ' + @CRLF + CHAR(9) + CHAR(9) + '}'; SET @result = 'using System;' + @CRLF + @CRLF + 'using MyCompany.Business;' + @CRLF + @CRLF + 'namespace ' + @Namespace + @CRLF + '{' + @CRLF + ' public class ' + @TableName + ' : ObservableObject' + @CRLF + ' {' + @CRLF + ' #region Instance Properties' + @CRLF SELECT @result = @result + REPLACE( REPLACE(@PrivateProp , '<ColumnName>', ColumnName) , '<ColumnType>', ColumnType) + REPLACE( REPLACE(@PublicProp , '<ColumnName>', ColumnName) , '<ColumnType>', ColumnType) FROM ( SELECT c.COLUMN_NAME AS ColumnName , CASE c.DATA_TYPE WHEN 'bigint' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Int64?' ELSE 'Int64' END WHEN 'binary' THEN 'Byte[]' WHEN 'bit' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Boolean?' ELSE 'Boolean' END WHEN 'char' THEN 'String' WHEN 'date' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'datetime' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'datetime2' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'datetimeoffset' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTimeOffset?' ELSE 'DateTimeOffset' END WHEN 'decimal' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END WHEN 'float' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Single?' ELSE 'Single' END WHEN 'image' THEN 'Byte[]' WHEN 'int' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Int32?' ELSE 'Int32' END WHEN 'money' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END WHEN 'nchar' THEN 'String' WHEN 'ntext' THEN 'String' WHEN 'numeric' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END WHEN 'nvarchar' THEN 'String' WHEN 'real' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Double?' ELSE 'Double' END WHEN 'smalldatetime' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'smallint' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Int16?' ELSE 'Int16'END WHEN 'smallmoney' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END WHEN 'text' THEN 'String' WHEN 'time' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'TimeSpan?' ELSE 'TimeSpan' END WHEN 'timestamp' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'tinyint' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Byte?' ELSE 'Byte' END WHEN 'uniqueidentifier' THEN 'Guid' WHEN 'varbinary' THEN 'Byte[]' WHEN 'varchar' THEN 'String' ELSE 'Object' END AS ColumnType , c.ORDINAL_POSITION FROM INFORMATION_SCHEMA.COLUMNS c WHERE c.TABLE_NAME = @TableName AND ISNULL(@Schema, c.TABLE_SCHEMA) = c.TABLE_SCHEMA ) t ORDER BY t.ORDINAL_POSITION SELECT @result = @result + @CRLF + CHAR(9) + '#endregion Instance Properties' + @CRLF + --CHAR(9) + @RPCProc + @CRLF + CHAR(9) + @PropChanged + @CRLF + CHAR(9) + '}' + @CRLF + @CRLF + '}' --SELECT @result PRINT @result 

基类是基于乔希史密斯的文章在这里从http://joshsmithonwpf.wordpress.com/2007/08/29/a-base-class-which-implements-inotifypropertychanged/

我没有重命名类被称为ObservableObject，并利用CallerMemberName属性利用ac＃5function

 //From http://joshsmithonwpf.wordpress.com/2007/08/29/a-base-class-which-implements-inotifypropertychanged/ // //Jana's change: Used c# 5 feature to bypass passing in the property name using [CallerMemberName] // protected void RaisePropertyChanged([CallerMemberName] string propertyName = "") using System; using System.Collections.Generic; using System.ComponentModel; using System.Diagnostics; using System.Reflection; using System.Runtime.CompilerServices; namespace MyCompany.Business { /// <summary> /// Implements the INotifyPropertyChanged interface and /// exposes a RaisePropertyChanged method for derived /// classes to raise the PropertyChange event. The event /// arguments created by this class are cached to prevent /// managed heap fragmentation. /// </summary> [Serializable] public abstract class ObservableObject : INotifyPropertyChanged { #region Data private static readonly Dictionary<string, PropertyChangedEventArgs> eventArgCache; private const string ERROR_MSG = "{0} is not a public property of {1}"; #endregion // Data #region Constructors static ObservableObject() { eventArgCache = new Dictionary<string, PropertyChangedEventArgs>(); } protected ObservableObject() { } #endregion // Constructors #region Public Members /// <summary> /// Raised when a public property of this object is set. /// </summary> [field: NonSerialized] public event PropertyChangedEventHandler PropertyChanged; /// <summary> /// Returns an instance of PropertyChangedEventArgs for /// the specified property name. /// </summary> /// <param name="propertyName"> /// The name of the property to create event args for. /// </param> public static PropertyChangedEventArgs GetPropertyChangedEventArgs(string propertyName) { if (String.IsNullOrEmpty(propertyName)) throw new ArgumentException( "propertyName cannot be null or empty."); PropertyChangedEventArgs args; // Get the event args from the cache, creating them // and adding to the cache if necessary. lock (typeof(ObservableObject)) { bool isCached = eventArgCache.ContainsKey(propertyName); if (!isCached) { eventArgCache.Add( propertyName, new PropertyChangedEventArgs(propertyName)); } args = eventArgCache[propertyName]; } return args; } #endregion // Public Members #region Protected Members /// <summary> /// Derived classes can override this method to /// execute logic after a property is set. The /// base implementation does nothing. /// </summary> /// <param name="propertyName"> /// The property which was changed. /// </param> protected virtual void AfterPropertyChanged(string propertyName) { } /// <summary> /// Attempts to raise the PropertyChanged event, and /// invokes the virtual AfterPropertyChanged method, /// regardless of whether the event was raised or not. /// </summary> /// <param name="propertyName"> /// The property which was changed. /// </param> protected void RaisePropertyChanged([CallerMemberName] string propertyName = "") { this.VerifyProperty(propertyName); PropertyChangedEventHandler handler = this.PropertyChanged; if (handler != null) { // Get the cached event args. PropertyChangedEventArgs args = GetPropertyChangedEventArgs(propertyName); // Raise the PropertyChanged event. handler(this, args); } this.AfterPropertyChanged(propertyName); } #endregion // Protected Members #region Private Helpers [Conditional("DEBUG")] private void VerifyProperty(string propertyName) { Type type = this.GetType(); // Look for a public property with the specified name. PropertyInfo propInfo = type.GetProperty(propertyName); if (propInfo == null) { // The property could not be found, // so alert the developer of the problem. string msg = string.Format( ERROR_MSG, propertyName, type.FullName); Debug.Fail(msg); } } #endregion // Private Helpers } } 

这里是你们将会更喜欢的部分。 我构build了一个Powershell脚本来为SQL数据库中的所有表生成。 它基于一个名叫Chad Miller的Powershell guru的Invoke-SQLCmd2 cmdlet，可以从这里下载： http ://gallery.technet.microsoft.com/ScriptCenter/7985b7ef-ed89-4dfd-b02a-433cc4e30894/

一旦拥有该cmdlet，为所有表生成的Powershell脚本就变得简单了（用您的特定值replacevariables）。

 . C:\MyScripts\Invoke-Sqlcmd2.ps1 $serverInstance = "MySQLInstance" $databaseName = "MyDb" $generatorSQLFile = "C:\MyScripts\ModelGen.sql" $tableListSQL = "SELECT name FROM $databaseName.sys.tables" $outputFolder = "C:\MyScripts\Output\" $namespace = "MyCompany.Business" $placeHolderSchema = "&Schema" $placeHolderTableName = "&TableName" $placeHolderNamespace = "&Namespace" #Get the list of tables in the database to generate c# models for $tables = Invoke-Sqlcmd2 -ServerInstance $serverInstance -Database $databaseName -Query $tableListSQL -As DataRow -Verbose foreach ($table in $tables) { $table1 = $table[0] $outputFile = "$outputFolder\$table1.cs" #Replace variables with values (returns an array that we convert to a string to use as query) $generatorSQLFileWSubstitutions = (Get-Content $generatorSQLFile). Replace($placeHolderSchema,"dbo"). Replace($placeHolderTableName, $table1). Replace($placeHolderNamespace, $namespace) | Out-String "Ouputing for $table1 to $outputFile" #The command generates .cs file content for model using "PRINT" statements which then gets written to verbose output (stream 4) # ...capture the verbose output and redirect to a file (Invoke-Sqlcmd2 -ServerInstance $serverInstance -Database $databaseName -Query $generatorSQLFileWSubstitutions -Verbose) 4> $outputFile } 

Answer 6

是的，如果你使用像Dapper这样简单的ORM，这些都是非常棒的。

如果使用.Net，则可以使用WriteXmlSchema方法在运行时使用任何DataSet生成XSD文件。 http://msdn.microsoft.com/en-us/library/xt7k72x8(v=vs.110).aspx

喜欢这个：

 using (SqlConnection cnn = new SqlConnection(mConnStr)) { DataSet Data = new DataSet(); cnn.Open(); string sql = "SELECT * FROM Person"; using (SqlDataAdapter Da = new SqlDataAdapter(sql, cnn)) { try { Da.Fill(Data); Da.TableMappings.Add("Table", "Person"); Data.WriteXmlSchema(@"C:\Person.xsd"); } catch (Exception ex) { MessageBox.Show(ex.Message); } } cnn.Close(); 

从那里，您可以使用xsd.exe从开发人员命令提示符创build一个XML序列化的类。 http://msdn.microsoft.com/en-us/library/x6c1kb0s(v=vs.110).aspx

喜欢这个：

 xsd C:\Person.xsd /classes /language:CS 

Answer 7

有点迟了，但我创build了一个web工具来帮助从SQL结果，SQL表和SQL SP创build一个C＃（或其他）对象。

sql2object.com

这真的可以安全地input所有的属性和types。

如果这些types不被识别，则会select默认值。

Answer 8

如果您有权访问SQL Server 2016，则可以使用FOR JSON（具有INCLUDE_NULL_VALUES）选项从select语句获取JSON输出。 复制输出，然后在Visual Studio中，粘贴特殊 – >粘贴JSON作为类。

一种预算解决scheme，但可能会节省一些时间。

Answer 9

商业，但CodeSmith发电机做到这一点： http : //www.codesmithtools.com/product/generator

Answer 10

我很困惑，你想从中得到什么，但是在devise你想要devise的东西时，这里是一般的select。

1. 在您的Visual Studio版本中使用内置的ORM。
2. 自己写一个，类似于你的代码示例。 像往常一样，如果你不确定如何，教程是你最好的朋友。
3. 使用一个替代的ORM，如NHibernate 。

Answer 11

要打印NULLABLE属性WITH COMMENTS（摘要），使用这个。
这是第一个答案的轻微修改

 declare @TableName sysname = 'TableName' declare @result varchar(max) = 'public class ' + @TableName + ' {' select @result = @result + CASE WHEN ColumnDesc IS NOT NULL THEN ' /// <summary> /// ' + ColumnDesc + ' /// </summary>' ELSE '' END + ' public ' + ColumnType + ' ' + ColumnName + ' { get; set; }' from ( select replace(col.name, ' ', '_') ColumnName, column_id, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'bool' when 'char' then 'String' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'int' when 'money' then 'decimal' when 'nchar' then 'char' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'String' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'String' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' else 'UNKNOWN_' + typ.name END + CASE WHEN col.is_nullable=1 AND typ.name NOT IN ('binary', 'varbinary', 'image', 'text', 'ntext', 'varchar', 'nvarchar', 'char', 'nchar') THEN '?' ELSE '' END ColumnType, colDesc.colDesc AS ColumnDesc from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id OUTER APPLY ( SELECT TOP 1 CAST(value AS NVARCHAR(max)) AS colDesc FROM sys.extended_properties WHERE major_id = col.object_id AND minor_id = COLUMNPROPERTY(major_id, col.name, 'ColumnId') ) colDesc where object_id = object_id(@TableName) ) t order by column_id set @result = @result + ' }' print @result 

Answer 12

Visual Studio杂志发表了这个：

为SQL查询结果生成.NET POCO类

它有一个你可以build立的可下载项目，给它你的SQL信息，它会为你启动课程。

现在，如果该工具只是为SELECT，INSERT和UPDATE创build了SQL命令….

Answer 13

从最高回复略微修改：

 declare @TableName sysname = 'HistoricCommand' declare @Result varchar(max) = '[System.Data.Linq.Mapping.Table(Name = "' + @TableName + '")] public class Dbo' + @TableName + ' {' select @Result = @Result + ' [System.Data.Linq.Mapping.Column(Name = "' + t.ColumnName + '", IsPrimaryKey = ' + pkk.ISPK + ')] public ' + ColumnType + NullableSign + ' ' + t.ColumnName + ' { get; set; } ' from ( select replace(col.name, ' ', '_') ColumnName, column_id ColumnId, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'bool' when 'char' then 'string' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'int' when 'money' then 'decimal' when 'nchar' then 'string' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'string' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'string' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' else 'UNKNOWN_' + typ.name end ColumnType, case when col.is_nullable = 1 and typ.name in ('bigint', 'bit', 'date', 'datetime', 'datetime2', 'datetimeoffset', 'decimal', 'float', 'int', 'money', 'numeric', 'real', 'smalldatetime', 'smallint', 'smallmoney', 'time', 'tinyint', 'uniqueidentifier') then '?' else '' end NullableSign from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id where object_id = object_id(@TableName) ) t, ( SELECT c.name AS 'ColumnName', CASE WHEN dd.pk IS NULL THEN 'false' ELSE 'true' END ISPK FROM sys.columns c JOIN sys.tables t ON c.object_id = t.object_id LEFT JOIN (SELECT K.COLUMN_NAME , C.CONSTRAINT_TYPE as pk FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS K LEFT JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS C ON K.TABLE_NAME = C.TABLE_NAME AND K.CONSTRAINT_NAME = C.CONSTRAINT_NAME AND K.CONSTRAINT_CATALOG = C.CONSTRAINT_CATALOG AND K.CONSTRAINT_SCHEMA = C.CONSTRAINT_SCHEMA WHERE K.TABLE_NAME = @TableName) as dd ON dd.COLUMN_NAME = c.name WHERE t.name = @TableName ) pkk where pkk.ColumnName = t.ColumnName order by ColumnId set @Result = @Result + ' }' print @Result 

这使得在C＃声明中完整的LINQ需要输出

 [System.Data.Linq.Mapping.Table(Name = "HistoricCommand")] public class DboHistoricCommand { [System.Data.Linq.Mapping.Column(Name = "HistoricCommandId", IsPrimaryKey = true)] public int HistoricCommandId { get; set; } [System.Data.Linq.Mapping.Column(Name = "PHCloudSoftwareInstanceId", IsPrimaryKey = true)] public int PHCloudSoftwareInstanceId { get; set; } [System.Data.Linq.Mapping.Column(Name = "CommandType", IsPrimaryKey = false)] public int CommandType { get; set; } [System.Data.Linq.Mapping.Column(Name = "InitiatedDateTime", IsPrimaryKey = false)] public DateTime InitiatedDateTime { get; set; } [System.Data.Linq.Mapping.Column(Name = "CompletedDateTime", IsPrimaryKey = false)] public DateTime CompletedDateTime { get; set; } [System.Data.Linq.Mapping.Column(Name = "WasSuccessful", IsPrimaryKey = false)] public bool WasSuccessful { get; set; } [System.Data.Linq.Mapping.Column(Name = "Message", IsPrimaryKey = false)] public string Message { get; set; } [System.Data.Linq.Mapping.Column(Name = "ResponseData", IsPrimaryKey = false)] public string ResponseData { get; set; } [System.Data.Linq.Mapping.Column(Name = "Message_orig", IsPrimaryKey = false)] public string Message_orig { get; set; } [System.Data.Linq.Mapping.Column(Name = "Message_XX", IsPrimaryKey = false)] public string Message_XX { get; set; } } 

Answer 14

你只是做了，只要你的桌子包含两列，被称为“tblPeople”。

你可以随时编写你自己的SQL包装器。 我实际上更喜欢这样做，我恨任何forms生成的代码。

Maybe create a DAL class, and have a method called GetPerson(int id) , that queries the database for that person, and then creates your Person object from the result set.

Answer 15

The simplest way is EF, Reverse Engineer. http://msdn.microsoft.com/en-US/data/jj593170

Answer 16

I like to setup my classes with private local members and public accessors / mutators. So I've modified Alex's script above to do that as well for anyone that is intersted.

 declare @TableName sysname = 'TABLE_NAME' declare @result varchar(max) = 'public class ' + @TableName + ' {' SET @result = @result + ' public ' + @TableName + '() {} '; select @result = @result + ' private ' + ColumnType + ' ' + ' m_' + stuff(replace(ColumnName, '_', ''), 1, 1, lower(left(ColumnName, 1))) + ';' from ( select replace(col.name, ' ', '_') ColumnName, column_id, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'bool' when 'char' then 'string' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'int' when 'money' then 'decimal' when 'nchar' then 'char' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'string' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'string' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' else 'UNKNOWN_' + typ.name end ColumnType from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id where object_id = object_id(@TableName) ) t order by column_id SET @result = @result + ' ' select @result = @result + ' public ' + ColumnType + ' ' + ColumnName + ' { get { return m_' + stuff(replace(ColumnName, '_', ''), 1, 1, lower(left(ColumnName, 1))) + ';} set {m_' + stuff(replace(ColumnName, '_', ''), 1, 1, lower(left(ColumnName, 1))) + ' = value;} }' from ( select replace(col.name, ' ', '_') ColumnName, column_id, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'bool' when 'char' then 'string' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'int' when 'money' then 'decimal' when 'nchar' then 'char' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'string' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'string' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' else 'UNKNOWN_' + typ.name end ColumnType from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id where object_id = object_id(@TableName) ) t order by column_id set @result = @result + ' }' print @result 

Answer 17

A small addition to the solutions before: object_id(@TableName) works only if you are in the default schema.

 (Select id from sysobjects where name = @TableName) 

works in any schema provided @tableName is unique.

Answer 18

Here is an article I have written for Generating the Entity Class from the a SQL Table in MSSQL

Create Entity Class From SQL Table

Answer 19

In appreciation to Alex's solution and Guilherme for asking I made this for MySQL to generate C# classes

 set @schema := 'schema_name'; set @table := 'table_name'; SET group_concat_max_len = 2048; SELECT concat('public class ', @table, '\n{\n', GROUP_CONCAT(a.property_ SEPARATOR '\n'), '\n}') class_ FROM (select CONCAT( '\tpublic ', case when DATA_TYPE = 'bigint' then 'long' when DATA_TYPE = 'BINARY' then 'byte[]' when DATA_TYPE = 'bit' then 'bool' when DATA_TYPE = 'char' then 'string' when DATA_TYPE = 'date' then 'DateTime' when DATA_TYPE = 'datetime' then 'DateTime' when DATA_TYPE = 'datetime2' then 'DateTime' when DATA_TYPE = 'datetimeoffset' then 'DateTimeOffset' when DATA_TYPE = 'decimal' then 'decimal' when DATA_TYPE = 'double' then 'double' when DATA_TYPE = 'float' then 'float' when DATA_TYPE = 'image' then 'byte[]' when DATA_TYPE = 'int' then 'int' when DATA_TYPE = 'money' then 'decimal' when DATA_TYPE = 'nchar' then 'char' when DATA_TYPE = 'ntext' then 'string' when DATA_TYPE = 'numeric' then 'decimal' when DATA_TYPE = 'nvarchar' then 'string' when DATA_TYPE = 'real' then 'double' when DATA_TYPE = 'smalldatetime' then 'DateTime' when DATA_TYPE = 'smallint' then 'short' when DATA_TYPE = 'smallmoney' then 'decimal' when DATA_TYPE = 'text' then 'string' when DATA_TYPE = 'time' then 'TimeSpan' when DATA_TYPE = 'timestamp' then 'DateTime' when DATA_TYPE = 'tinyint' then 'byte' when DATA_TYPE = 'uniqueidentifier' then 'Guid' when DATA_TYPE = 'varbinary' then 'byte[]' when DATA_TYPE = 'varchar' then 'string' else '_UNKNOWN_' end, ' ', COLUMN_NAME, ' {get; set;}') as property_ FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = @table AND table_schema = @schema) a ; 

 Thanks Alex and Guilherme! 

Answer 20

In case it's useful to anyone else, working on a Code-First approach using attribute mappings, I wanted something that just left me needing to bind an entity in the object model. So thanks to Carnotaurus' answer, I extended it as per their own suggestion and made a couple of tweaks.

This relies therefore on this solution comprising TWO parts, both of which are SQL Scalar-Valued functions:

1. An 'Initial Caps' function (taken from: https://social.msdn.microsoft.com/Forums/sqlserver/en-US/8a58dbe1-7a4b-4287-afdc-bfecb4e69b23/similar-to-initcap-in-sql-server-tsql and slightly modified to meet my needs)

 ALTER function [dbo].[ProperCase] (@cStringToProper varchar(8000)) returns varchar(8000) as begin declare @Position int select @cStringToProper = stuff(lower(@cStringToProper) , 1 , 1 , upper(left(@cStringToProper , 1))) , @Position = patindex('%[^a-zA-Z][az]%' , @cStringToProper collate Latin1_General_Bin) while @Position > 0 select @cStringToProper = stuff(@cStringToProper , @Position , 2 , upper(substring(@cStringToProper , @Position , 2))) , @Position = patindex('%[^a-zA-Z][az]%' , @cStringToProper collate Latin1_General_Bin) select @cStringToProper = replace(@cStringToProper, '_','') return @cStringToProper end 

2. The output function itself, which extends Carnotaurus' solution by:

   • Correctly outputting newline characters
   • Performing some basic tabulation
   • Writing out an appropriate a [Table] mapping (as suggested)
   • Writing out an appropriate [Column] mapping, including the type name (as suggested)
   • Allowing the Entity name to differ from the name of the table
   • Fixes the limitation of the Print @Result truncating when you have tables with a large number of columns

 CREATE FUNCTION [dbo].[GetEntityObject] (@NameSpace NVARCHAR(MAX), @TableName NVARCHAR(MAX), @EntityName NVARCHAR(MAX)) RETURNS NVARCHAR(MAX) AS BEGIN DECLARE @result NVARCHAR(MAX) SET @result = @result + 'using System;' + CHAR(13) + CHAR(13) IF (@NameSpace IS NOT NULL) BEGIN SET @result = @result + 'namespace ' + @NameSpace + CHAR(13) + '{' + CHAR(13) END SET @result = @result + '[Table(name: ' + CHAR(34) + @TableName + CHAR(34) + ')]' + CHAR(13) SET @result = @result + 'public class ' + @EntityName + CHAR(13) + '{' + CHAR(13) SET @result = @result + '#region Instance Properties' + CHAR(13) SELECT @result = @result + CHAR(13) + '[Column(name: ' + CHAR(34) + OriginalColumnName + CHAR(34) + ', TypeName = ' + CHAR(34) + DataType + CHAR(34) + ')]' + CHAR(13) + 'public ' + ColumnType + ' ' + ColumnName + ' { get; set; } ' + CHAR(13) FROM ( SELECT dbo.ProperCase (c.COLUMN_NAME) AS ColumnName , CASE c.DATA_TYPE WHEN 'bigint' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Int64?' ELSE 'Int64' END WHEN 'binary' THEN 'Byte[]' WHEN 'bit' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Boolean?' ELSE 'Boolean' END WHEN 'char' THEN 'String' WHEN 'date' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'datetime' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'datetime2' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'datetimeoffset' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTimeOffset?' ELSE 'DateTimeOffset' END WHEN 'decimal' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END WHEN 'float' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Single?' ELSE 'Single' END WHEN 'image' THEN 'Byte[]' WHEN 'int' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Int32?' ELSE 'Int32' END WHEN 'money' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END WHEN 'nchar' THEN 'String' WHEN 'ntext' THEN 'String' WHEN 'numeric' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END WHEN 'nvarchar' THEN 'String' WHEN 'real' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Double?' ELSE 'Double' END WHEN 'smalldatetime' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'smallint' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Int16?' ELSE 'Int16'END WHEN 'smallmoney' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END WHEN 'text' THEN 'String' WHEN 'time' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'TimeSpan?' ELSE 'TimeSpan' END WHEN 'timestamp' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END WHEN 'tinyint' THEN CASE C.IS_NULLABLE WHEN 'YES' THEN 'Byte?' ELSE 'Byte' END WHEN 'uniqueidentifier' THEN 'Guid' WHEN 'varbinary' THEN 'Byte[]' WHEN 'varchar' THEN 'String' ELSE 'Object' END AS ColumnType , c.ORDINAL_POSITION , c.COLUMN_NAME as OriginalColumnName ,c.DATA_TYPE as DataType FROM INFORMATION_SCHEMA.COLUMNS c WHERE c.TABLE_NAME = @TableName) t ORDER BY t.ORDINAL_POSITION SET @result = @result + CHAR(13) + '#endregion Instance Properties' + CHAR(13) SET @result = @result + '}' + CHAR(13) IF (@TableName IS NOT NULL) BEGIN SET @result = @result + CHAR(13) + '}' END return @result END 

Usage from within MS SQL Management Studio:

SELECT dbo.GetEntityObject('MyNameSpace', 'MyTableName', 'MyEntityName')

will result in a column value you can copy and paste into Visual Studio.

If it helps anyone, then great!

Answer 21

Grab QueryFirst , visual studio extension that generates wrapper classes from SQL queries. You not only get…

 public class MyClass{ public string MyProp{get;set;} public int MyNumberProp{get;set;} ... } 

And as a bonus, it'll throw in…

 public class MyQuery{ public static IEnumerable<MyClass>Execute(){} public static MyClass GetOne(){} ... } 

Are you sure you want to base your classes directly on your tables? Tables are a static, normalized data storage notion that belongs in the DB. Classes are dynamic, fluid, disposable, context-specific, perhaps denormalized. Why not write real queries for the data you want for an operation, and let QueryFirst generate the classes from that.

Answer 22

This post has saved me several times. I just want to add my two cents. For those that dont like to use ORMs, and instead write their own DAL classes, when you have like 20 columns in a table, and 40 different tables with their respective CRUD operations, its painful and a waste of time. I repeated the above code, for generating CRUD methods based on the table entity and properties.

  declare @TableName sysname = 'Tablename' declare @Result varchar(max) = 'public class ' + @TableName + ' {' select @Result = @Result + ' public ' + ColumnType + NullableSign + ' ' + ColumnName + ' { get; set; } ' from ( select replace(col.name, ' ', '_') ColumnName, column_id ColumnId, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'bool' when 'char' then 'string' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'int' when 'money' then 'decimal' when 'nchar' then 'char' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'string' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'string' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' else 'UNKNOWN_' + typ.name end ColumnType, case when col.is_nullable = 1 and typ.name in ('bigint', 'bit', 'date', 'datetime', 'datetime2', 'datetimeoffset', 'decimal', 'float', 'int', 'money', 'numeric', 'real', 'smalldatetime', 'smallint', 'smallmoney', 'time', 'tinyint', 'uniqueidentifier') then '?' else '' end NullableSign from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id where object_id = object_id(@TableName) ) t order by ColumnId set @Result = @Result + ' }' print @Result declare @InitDataAccess varchar(max) = 'public class '+ @TableName +'DataAccess { ' declare @ListStatement varchar(max) ='public List<'+@TableName+'> Get'+@TableName+'List() { String conn = ConfigurationManager.ConnectionStrings["ConnectionNameInWeb.config"].ConnectionString; var itemList = new List<'+@TableName+'>(); try { using (var sqlCon = new SqlConnection(conn)) { sqlCon.Open(); var cmd = new SqlCommand { Connection = sqlCon, CommandType = CommandType.StoredProcedure, CommandText = "StoredProcedureSelectAll" }; SqlDataReader reader = cmd.ExecuteReader(); while (reader.Read()) { var item = new '+@TableName+'(); ' select @ListStatement = @ListStatement + ' item.'+ ColumnName + '= ('+ ColumnType + NullableSign +')reader["'+ColumnName+'"]; ' from ( select replace(col.name, ' ', '_') ColumnName, column_id ColumnId, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'bool' when 'char' then 'string' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'int' when 'money' then 'decimal' when 'nchar' then 'char' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'string' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'string' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' else 'UNKNOWN_' + typ.name end ColumnType, case when col.is_nullable = 1 and typ.name in ('bigint', 'bit', 'date', 'datetime', 'datetime2', 'datetimeoffset', 'decimal', 'float', 'int', 'money', 'numeric', 'real', 'smalldatetime', 'smallint', 'smallmoney', 'time', 'tinyint', 'uniqueidentifier') then '?' else '' end NullableSign from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id where object_id = object_id(@TableName) ) t order by ColumnId select @ListStatement = @ListStatement +' itemList.Add(item); } } } catch (Exception ex) { throw new Exception(ex.Message); } return itemList; }' declare @GetIndividual varchar(max) = 'public '+@TableName+' Get'+@TableName+'() { String conn = ConfigurationManager.ConnectionStrings["ConnectionNameInWeb.config"].ConnectionString; var item = new '+@TableName+'(); try { using (var sqlCon = new SqlConnection(conn)) { sqlCon.Open(); var cmd = new SqlCommand { Connection = sqlCon, CommandType = CommandType.StoredProcedure, CommandText = "StoredProcedureSelectIndividual" }; cmd.Parameters.AddWithValue("@ItemCriteria", item.id); SqlDataReader reader = cmd.ExecuteReader(); if (reader.Read()) {' select @GetIndividual = @GetIndividual + ' item.'+ ColumnName + '= ('+ ColumnType + NullableSign +')reader["'+ColumnName+'"]; ' from ( select replace(col.name, ' ', '_') ColumnName, column_id ColumnId, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'bool' when 'char' then 'string' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'int' when 'money' then 'decimal' when 'nchar' then 'char' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'string' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'string' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' else 'UNKNOWN_' + typ.name end ColumnType, case when col.is_nullable = 1 and typ.name in ('bigint', 'bit', 'date', 'datetime', 'datetime2', 'datetimeoffset', 'decimal', 'float', 'int', 'money', 'numeric', 'real', 'smalldatetime', 'smallint', 'smallmoney', 'time', 'tinyint', 'uniqueidentifier') then '?' else '' end NullableSign from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id where object_id = object_id(@TableName) ) t order by ColumnId select @GetIndividual = @GetIndividual +' } } } catch (Exception ex) { throw new Exception(ex.Message); } return item; }' declare @InsertStatement varchar(max) = 'public void Insert'+@TableName+'('+@TableName+' item) { String conn = ConfigurationManager.ConnectionStrings["ConnectionNameInWeb.config"].ConnectionString; try { using (var sqlCon = new SqlConnection(conn)) { sqlCon.Open(); var cmd = new SqlCommand { Connection = sqlCon, CommandType = CommandType.StoredProcedure, CommandText = "StoredProcedureInsert" }; ' select @InsertStatement = @InsertStatement + ' cmd.Parameters.AddWithValue("@'+ColumnName+'", item.'+ColumnName+'); ' from ( select replace(col.name, ' ', '_') ColumnName, column_id ColumnId, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'bool' when 'char' then 'string' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'int' when 'money' then 'decimal' when 'nchar' then 'char' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'string' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'string' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' else 'UNKNOWN_' + typ.name end ColumnType, case when col.is_nullable = 1 and typ.name in ('bigint', 'bit', 'date', 'datetime', 'datetime2', 'datetimeoffset', 'decimal', 'float', 'int', 'money', 'numeric', 'real', 'smalldatetime', 'smallint', 'smallmoney', 'time', 'tinyint', 'uniqueidentifier') then '?' else '' end NullableSign from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id where object_id = object_id(@TableName) ) t order by ColumnId select @InsertStatement = @InsertStatement +' cmd.ExecuteNonQuery(); } } catch (Exception ex) { throw new Exception(ex.Message); } }' declare @UpdateStatement varchar(max) = 'public void Update'+@TableName+'('+@TableName+' item) { String conn = ConfigurationManager.ConnectionStrings["ConnectionNameInWeb.config"].ConnectionString; try { using (var sqlCon = new SqlConnection(conn)) { sqlCon.Open(); var cmd = new SqlCommand { Connection = sqlCon, CommandType = CommandType.StoredProcedure, CommandText = "StoredProcedureUpdate" }; cmd.Parameters.AddWithValue("@UpdateCriteria", item.Id); ' select @UpdateStatement = @UpdateStatement + ' cmd.Parameters.AddWithValue("@'+ColumnName+'", item.'+ColumnName+'); ' from ( select replace(col.name, ' ', '_') ColumnName, column_id ColumnId, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'bool' when 'char' then 'string' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'int' when 'money' then 'decimal' when 'nchar' then 'char' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'string' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'string' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' else 'UNKNOWN_' + typ.name end ColumnType, case when col.is_nullable = 1 and typ.name in ('bigint', 'bit', 'date', 'datetime', 'datetime2', 'datetimeoffset', 'decimal', 'float', 'int', 'money', 'numeric', 'real', 'smalldatetime', 'smallint', 'smallmoney', 'time', 'tinyint', 'uniqueidentifier') then '?' else '' end NullableSign from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id where object_id = object_id(@TableName) ) t order by ColumnId select @UpdateStatement = @UpdateStatement +' cmd.ExecuteNonQuery(); } } catch (Exception ex) { throw new Exception(ex.Message); } }' declare @EndDataAccess varchar(max) = ' }' print @InitDataAccess print @GetIndividual print @InsertStatement print @UpdateStatement print @ListStatement print @EndDataAccess 

Of course its not bulletproof code, and can be improved. Just wanted to contribute to this excelent solution

Answer 23

create PROCEDURE for create custom code using template

 create PROCEDURE [dbo].[createCode] ( @TableName sysname = '', @befor varchar(max)='public class @TableName {', @templet varchar(max)=' public @ColumnType @ColumnName { get; set; } // @ColumnDesc ', @after varchar(max)=' }' ) AS BEGIN declare @result varchar(max) set @befor =replace(@befor,'@TableName',@TableName) set @result=@befor select @result = @result + replace(replace(replace(replace(replace(@templet,'@ColumnType',ColumnType) ,'@ColumnName',ColumnName) ,'@ColumnDesc',ColumnDesc),'@ISPK',ISPK),'@max_length',max_length) from ( select column_id, replace(col.name, ' ', '_') ColumnName, typ.name as sqltype, typ.max_length, is_identity, pkk.ISPK, case typ.name when 'bigint' then 'long' when 'binary' then 'byte[]' when 'bit' then 'bool' when 'char' then 'String' when 'date' then 'DateTime' when 'datetime' then 'DateTime' when 'datetime2' then 'DateTime' when 'datetimeoffset' then 'DateTimeOffset' when 'decimal' then 'decimal' when 'float' then 'float' when 'image' then 'byte[]' when 'int' then 'int' when 'money' then 'decimal' when 'nchar' then 'char' when 'ntext' then 'string' when 'numeric' then 'decimal' when 'nvarchar' then 'String' when 'real' then 'double' when 'smalldatetime' then 'DateTime' when 'smallint' then 'short' when 'smallmoney' then 'decimal' when 'text' then 'String' when 'time' then 'TimeSpan' when 'timestamp' then 'DateTime' when 'tinyint' then 'byte' when 'uniqueidentifier' then 'Guid' when 'varbinary' then 'byte[]' when 'varchar' then 'string' else 'UNKNOWN_' + typ.name END + CASE WHEN col.is_nullable=1 AND typ.name NOT IN ('binary', 'varbinary', 'image', 'text', 'ntext', 'varchar', 'nvarchar', 'char', 'nchar') THEN '?' ELSE '' END ColumnType, isnull(colDesc.colDesc,'') AS ColumnDesc from sys.columns col join sys.types typ on col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id left join ( SELECT c.name AS 'ColumnName', CASE WHEN dd.pk IS NULL THEN 'false' ELSE 'true' END ISPK FROM sys.columns c JOIN sys.tables t ON c.object_id = t.object_id LEFT JOIN (SELECT K.COLUMN_NAME , C.CONSTRAINT_TYPE as pk FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS K LEFT JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS C ON K.TABLE_NAME = C.TABLE_NAME AND K.CONSTRAINT_NAME = C.CONSTRAINT_NAME AND K.CONSTRAINT_CATALOG = C.CONSTRAINT_CATALOG AND K.CONSTRAINT_SCHEMA = C.CONSTRAINT_SCHEMA WHERE K.TABLE_NAME = @TableName) as dd ON dd.COLUMN_NAME = c.name WHERE t.name = @TableName ) pkk on ColumnName=col.name OUTER APPLY ( SELECT TOP 1 CAST(value AS NVARCHAR(max)) AS colDesc FROM sys.extended_properties WHERE major_id = col.object_id AND minor_id = COLUMNPROPERTY(major_id, col.name, 'ColumnId') ) colDesc where object_id = object_id(@TableName) ) t set @result=@result+@after select @result --print @result END 

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now create custom code

for example c# class

 exec [createCode] @TableName='book',@templet =' public @ColumnType @ColumnName { get; set; } // @ColumnDesc ' 

输出是

 public class book { public long ID { get; set; } // public String Title { get; set; } // Book Title } 

for LINQ

 exec [createCode] @TableName='book' , @befor ='[System.Data.Linq.Mapping.Table(Name = "@TableName")] public class @TableName {', @templet =' [System.Data.Linq.Mapping.Column(Name = "@ColumnName", IsPrimaryKey = @ISPK)] public @ColumnType @ColumnName { get; set; } // @ColumnDesc ' , @after =' }' 

输出是

 [System.Data.Linq.Mapping.Table(Name = "book")] public class book { [System.Data.Linq.Mapping.Column(Name = "ID", IsPrimaryKey = true)] public long ID { get; set; } // [System.Data.Linq.Mapping.Column(Name = "Title", IsPrimaryKey = false)] public String Title { get; set; } // Book Title } 

for java class

 exec [createCode] @TableName='book',@templet =' public @ColumnType @ColumnName ; // @ColumnDesc public @ColumnType get@ColumnName() { return this.@ColumnName; } public void set@ColumnName(@ColumnType @ColumnName) { this.@ColumnName=@ColumnName; } ' 

输出是

 public class book { public long ID ; // public long getID() { return this.ID; } public void setID(long ID) { this.ID=ID; } public String Title ; // Book Title public String getTitle() { return this.Title; } public void setTitle(String Title) { this.Title=Title; } } 

for android sugarOrm model

 exec [createCode] @TableName='book' , @befor ='@Table(name = "@TableName") public class @TableName {', @templet =' @Column(name = "@ColumnName") public @ColumnType @ColumnName ;// @ColumnDesc ' , @after =' }' 

输出是

 @Table(name = "book") public class book { @Column(name = "ID") public long ID ;// @Column(name = "Title") public String Title ;// Book Title }