Regex.IsMatch()方法

定义

命名空间:System.Text.RegularExpressions
程序集:System.Text.RegularExpressions.dll

官网：https://learn.microsoft.com/zh-cn/dotnet/api/system.text.regularexpressions.regex.ismatch?view=net-6.0#code-try-1

指示正则表达式在输入字符串中是否找到匹配项。

1.第一个参数为输入，第二个参数为正则表达式字符串，例如：Regex.IsMatch(text,@"^[1]+$")

正则表达式

示例

using System;
using System.Text.RegularExpressions;

public class Example
{
   public static void Main()
   {
      string[] partNumbers= { "1298-673-4192", "A08Z-931-468a", 
                              "_A90-123-129X", "12345-KKA-1230", 
                              "0919-2893-1256" };
      string pattern = @"^[A-Z0-9]\d{2}[A-Z0-9](-\d{3}){2}[A-Z0-9]$";
      foreach (string partNumber in partNumbers)
         try {
            Console.WriteLine("{0} {1} a valid part number.", 
                              partNumber, 
                              Regex.IsMatch(partNumber, pattern, RegexOptions.IgnoreCase) 
                                            ? "is" : "is not", TimeSpan.FromMilliseconds(500));
         }
         catch (RegexMatchTimeoutException e) {
            Console.WriteLine("Timeout after {0} seconds matching {1}.",
                              e.MatchTimeout, e.Input);
         }
   }
}
// The example displays the following output:
//       1298-673-4192 is a valid part number.
//       A08Z-931-468a is a valid part number.
//       _A90-123-129X is not a valid part number.
//       12345-KKA-1230 is not a valid part number.
//       0919-2893-1256 is not a valid part number.

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