用C＃查找string中的文本

如何在string中find给定的文本？ 之后，我想创build一个新的string和其他东西之间。 例如…

如果string是：

This is an example string and my data is here 

我想创build一个string与“我的”和“是”之间的任何我怎么能做到这一点？ 对不起，这是非常伪，但希望它是有道理的。

Answer 1

使用此function。

 public static string getBetween(string strSource, string strStart, string strEnd) { int Start, End; if (strSource.Contains(strStart) && strSource.Contains(strEnd)) { Start = strSource.IndexOf(strStart, 0) + strStart.Length; End = strSource.IndexOf(strEnd, Start); return strSource.Substring(Start, End - Start); } else { return ""; } } 

如何使用它：

 string text = "This is an example string and my data is here"; string data = getBetween(text, "my", "is"); 

Answer 2

这是最简单的方法：

 if(str.Contains("hello")) 

Answer 3

你可以使用正则expression式：

 var regex = new Regex(".*my (.*) is.*"); if (regex.IsMatch("This is an example string and my data is here")) { var myCapturedText = regex.Match("This is an example string and my data is here").Groups[1].Value; Console.WriteLine("This is my captured text: {0}", myCapturedText); } 

Answer 4

  string string1 = "This is an example string and my data is here"; string toFind1 = "my"; string toFind2 = "is"; int start = string1.IndexOf(toFind1) + toFind1.Length; int end = string1.IndexOf(toFind2, start); //Start after the index of 'my' since 'is' appears twice string string2 = string1.Substring(start, end - start); 

Answer 5

你可以像这样紧凑地做到这一点：

 string abc = abc.Replace(abc.Substring(abc.IndexOf("me"), (abc.IndexOf("is", abc.IndexOf("me")) + 1) - abc.IndexOf("size")), string.Empty); 

Answer 6

 static void Main(string[] args) { int f = 0; Console.WriteLine("enter the string"); string s = Console.ReadLine(); Console.WriteLine("enter the word to be searched"); string a = Console.ReadLine(); int l = s.Length; int c = a.Length; for (int i = 0; i < l; i++) { if (s[i] == a[0]) { for (int K = i + 1, j = 1; j < c; j++, K++) { if (s[K] == a[j]) { f++; } } } } if (f == c - 1) { Console.WriteLine("matching"); } else { Console.WriteLine("not found"); } Console.ReadLine(); } 

Answer 7

除了@ Prashant的回答，上面的答案已被错误地回答。 答案的“replace”function在哪里？ OP问道：“之后，我想在这个和其他东西之间创build一个新的string”。

基于@奥斯卡的出色反应，我将其function扩展为一个"Search And Replace"function于一身。

我认为@Prashant的答案应该是OP所接受的答案，因为它代替了。

无论如何，我已经调用了我的变体ReplaceBetween() 。

 public static string ReplaceBetween(string strSource, string strStart, string strEnd, string strReplace) { int Start, End; if (strSource.Contains(strStart) && strSource.Contains(strEnd)) { Start = strSource.IndexOf(strStart, 0) + strStart.Length; End = strSource.IndexOf(strEnd, Start); string strToReplace = strSource.Substring(Start, End - Start); string newString = strSource.Concat(Start,strReplace,End - Start); return newString; } else { return string.Empty; } } 

Answer 8

  string WordInBetween(string sentence, string wordOne, string wordTwo) { int start = sentence.IndexOf(wordOne) + wordOne.Length + 1; int end = sentence.IndexOf(wordTwo) - start - 1; return sentence.Substring(start, end); } 

Answer 9

 using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Threading; using System.Diagnostics; namespace oops3 { public class Demo { static void Main(string[] args) { Console.WriteLine("Enter the string"); string x = Console.ReadLine(); Console.WriteLine("enter the string to be searched"); string SearchText = Console.ReadLine(); string[] myarr = new string[30]; myarr = x.Split(' '); int i = 0; foreach(string s in myarr) { i = i + 1; if (s==SearchText) { Console.WriteLine("The string found at position:" + i); } } Console.ReadLine(); } } } 

Answer 10

这是我使用Oscar Jara的功​​能作为模型的function。

 public static string getBetween(string strSource, string strStart, string strEnd) { const int kNotFound = -1; var startIdx = strSource.IndexOf(strStart); if (startIdx != kNotFound) { startIdx += strStart.Length; var endIdx = strSource.IndexOf(strEnd, startIdx); if (endIdx > startIdx) { return strSource.Substring(startIdx, endIdx - startIdx); } } return String.Empty; } 

这个版本至多有两个文本search。 它避免了在search仅在开始string之前出现的结束string（即， getBetween(text, "my", "and"); 。

用法是一样的：

 string text = "This is an example string and my data is here"; string data = getBetween(text, "my", "is"); 

Answer 11

如果你知道你总是想要“我的”和“是”之间的string，那么你总是可以执行以下操作：

 string message = "This is an example string and my data is here"; //Get the string position of the first word and add two (for it's length) int pos1 = message.IndexOf("my") + 2; //Get the string position of the next word, starting index being after the first position int pos2 = message.IndexOf("is", pos1); //use substring to obtain the information in between and store in a new string string data = message.Substring(pos1, pos2 - pos1).Trim();