How to allow some special characters using regular expression in asp.net c#
As we learn in our last article how to restrict special character using regular expression in asp.net c#. But many times we need to allow some special characters suppose we are validating address so we do not need to allow “@,#$%” type special characters. Let’s see we just need to put below validation expression in our regular validation expression in asp.net c#
ValidationExpression="^[\sa-zA-Z0-9,@&()-+]*$"
Source code:-
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="specialtextbox.aspx.cs" Inherits="specialtextbox" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:TextBox runat="server" ID="txtname" />
<asp:RegularExpressionValidator runat="server" ControlToValidate="txtname"
ForeColor="Red" SetFocusOnError="true" Display="Dynamic"
ErrorMessage="allow onlysome special characters like ,@&()-+" ID="rfvname"
ValidationExpression="^[\sa-zA-Z0-9,@&()-+]*$">
</asp:RegularExpressionValidator>
</form>
</body>
</html>
Output:-
How to allow some special characters using regular expression in asp.net c#
Reviewed by NEERAJ SRIVASTAVA
on
9:15:00 PM
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Reviewed by NEERAJ SRIVASTAVA
on
9:15:00 PM
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