如何在ASP.NET Web窗体正则表达式验证器中使用多个正则表达式

Question

我需要针对多个正则表达式来验证某些控件的输入，如何使用一个正则表达式验证器控件来做到这一点。

Answer 1

There's no way. You need a regular expression validator for each regex you want to test.

Answer 2

Try to build a regular expression using the OR operator. Check this links for more information about it:

http://forums.asp.net/t/1213089.aspx?Multiple+Format+in+Regular+Expression+Validator https://msdn.microsoft.com/en-us/library/aa976858(v=vs.71).aspx

If it's not possible to adapt and build a regular expression acording to your needs, you can use a custom validator and make all the validatations for each regular expression that you could need. Check this link for more information about Custom Validator.

Answer 3

I think the only solution to your problem is to use a custom validator.check the below code.this is just to give you an idea about how to use custom validator.

<asp:TextBox runat="server" ID="UserName" />                            
<asp:CustomValidator ID="CustomValidator1" runat="server" 
ControlToValidate="UserName" ></asp:CustomValidator>

protected void ValidateUser(object source, ServerValidateEventArgs args)
        {
            Regex regx = new Regex("^[a-zA-Z0-9]{6,}$");
            Regex regx2 = new Regex("^[a-zA-Z0-9]{6,}$");
            if (regx.IsMatch(UserName.Text) == false)
            {
                CustomValidator1.ErrorMessage = "error message";
                args.IsValid = false;
            }
            else if(regx2.IsMatch(UserName.Text) == false) 
            {
                CustomValidator1.ErrorMessage = "second error message";
                args.IsValid = false;
            }
          else
           {args.IsValid = true;}
       }