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Asp C# Regex for numeric characters only

In this article I will show you how to accept only numeric characters in asp .net c# using regex. Here is a label which contains alphanumric and special characters.

 

<asp:label text="a<b,c>d.e?f'g;H;i|j]k[l{m}n+o=p-q-r)s(t*u&v^%w$x#y@z!a~b`c123456789" id="lblValue" runat="server"> </asp:label>

 

Now to use Regex in asp .net we need to add Namespace

using System.Text.RegularExpressions;


Using asp c# code behind

//==== Create Regex object and pass pattern.
Regex reg = new Regex(@"[^0-9]");
 
//===== Read Label value and replace all non numeric characters with '-'
string str = reg.Replace(lblValue.Text, "-");
 
//==== Show output.
Response.Write(str);

 

Output :

 Asp c# regex for numerics only

 
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