<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
Me.TextBox1.Attributes.Add("onKeyPress", "return textboxMultilineMaxNumber(this,40);")
End Sub
</script>
<script type="text/javascript">
function textboxMultilineMaxNumber(txt,maxLen){
try{
if(txt.value.length > (maxLen-1))
return false;
}catch(e){
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>MaxLength Example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server" Text="Note that you can paste past the limit"
Width="50%" Rows="5" BackColor="#FFFFCC" TextMode="MultiLine">
</asp:TextBox>
<br /><br />
<asp:Button ID="Button1" runat="server" Text="Do Something" />
<br /><br />
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="TextBox1"
Display="Dynamic" ErrorMessage="Please limit to 40 characters or less."
ValidationExpression="[\s\S]{1,40}"></asp:RegularExpressionValidator>
</div>
</form>
</body>
</html>
Tuesday, 4 October 2011
How to fix maxlength in Multiline Textbox (or) TextArea in asp.net
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