不允许使用多个反斜杠和连字符的正则表达式 [英] Regular expression for more than one back slash and hyphen not allowed

问题描述

我在C＃应用程序中工作，我想对文本框进行验证，它不应该允许我多个反斜杠和多个连字符。那么有谁能告诉我如何使用正则表达式验证？



我将非常感谢你的帮助。



谢谢，

Hetal Gadhavi

解决方案

单个正则表达式并不容易 - 这不是他们的意思因为你必须自己允许所有可能的排列。



如果你在C＃中这样做是为了你说，然后我会用两个简单的正则表达式：

正则表达式连字符= 新正则表达式（   - ）; 
正则表达式反斜杠= 新正则表达式（ @  \\）; 
  string  inp =  @  123-22 -2\3\" ; 
  if （hyphens.Matches（inp）.Count >   1  || backslashes.Matches（inp）.Count >   1  ）
 {
  //  失败 
} 
 

Hi,

I am working in C# Application, I want to do validation of textbox that It should not allow me more than one back slash and more than one hyphen. So can anyone tell me how to do using Regular expression validation?

I''ll be grateful for your help.

Thanks,
Hetal Gadhavi

解决方案

That isn''t easy in a single regex - that isnt what they were created for, and it is a bit of a pain to implement, as you have to allow for all possible permutations yourself.

If you are doing this in C# as you say, then I would do it with two simple regexes:

Regex hyphens = new Regex("-");
Regex backslashes = new Regex(@"\\");
string inp = @"123-22-2\3";
if (hyphens.Matches(inp).Count > 1 || backslashes.Matches(inp).Count > 1)
    {
    // Failed
    }

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