Home > ASP.Net > Validate MultiLine TextBox Length

Validate MultiLine TextBox Length


Hi all,

try this example to Validate MultiLine TextBox Length

<%@ Page Language="C#"%>
<html>
<head runat="server">
<title>Multiline Textbox max length</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<p>Text should be less then or equal to 25 chars</p>
<asp:TextBox runat="server" ID="MLTextBox"
TextMode="MultiLine" >
</asp:TextBox>
<asp:RegularExpressionValidator
runat="server" Display="dynamic"
ControlToValidate="MLTextBox"
ValidationExpression="^([\S\s]{0,25})$"
ErrorMessage="<p>only 25 chars please</p>">
</asp:RegularExpressionValidator>
<p />
<asp:Button runat="server" text="Submit"/>
</div>
</form>
</body>
</html>

Hope this helps

Good Luck.

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Categories: ASP.Net
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