在C#中验证字符串变量 [英] validating string variable in c#

问题描述

嗨

我有一个如下所示的字符串变量.

字符串referenceNumber;
我想验证referenceNumber，因为它应该只包含字母，数字和下划线(_).
例如:-ghk234_1

除字母，数字和下划线(_)之外，该字符不得包含其他任何字符.
问候，
Nagaraju

Hi

I have a string variable as below.

string referenceNumber;
i want to validate referenceNumber as it should contain only alphabets,numbers and underscore(_).
ex:- ghk234_1

it should not allow any other except alphabets,numeric,and underscore(_).
Regards,
Nagaraju

推荐答案

查看正则表达式:System.Text.RegularExpressions.Regex.

Look into regular expressions: System.Text.RegularExpressions.Regex.

String testString = "ghk234_1";
String regExpString = "[a-zA-Z0-9_]*";
Regex regex = new Regex(regExpString);
Match match = regex.Match(testString);
if(match.Success)
{
    //String was OK
}
else
{
    //String was not OK
}

最好的问候，

Best Regards,

使用

Use regular expressions. It''s the most efficient way to analyze text information.

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