Asp C# Regex for special characters only

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




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(@"[a-zA-Z0-9]");

        //===== Read Label value and replace all non special characters with '-'
        string str = reg.Replace(lblValue.Text, "-");

        //==== Show output.


Output :

 Regex for special characters only asp c#

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