Hello,
I have an ASP.NET page which consists of a button (cmdSave), a label
(lblMessage), a text field (txtName) and a custom validator (vldName).
vldName is supposed to do both client *and* server validation of txtName;
the custom validation function is ValidateName, and the server validation
function is ValidateNameOnServer.
This validation should occur when cmdSave is clicked. If no text has been
entered, the validation should fail and an error message should be printed
on lblMessage; else the validation should succeed, and lblMessage should be
blank.
Unfortunately, I am having problems triggering both ValidateName or
ValidateNameOnServer. The alert won't go off in ValidateName, and when I put
a breakpoint in ValidateNameOnServer, it isn't hit.
Heres the code for the page:
<HTML>
<HEAD>
...
<script type="text/javascript">
function ValidateName(sender, args)
{
alert("In ValidateName.");
//var elem = getElementById("<% =lblMessage.ClientID %>");
if (args.Value.length != 0)
{
//elem.Value = "";
args.IsValid = true;
return true;
}
else
{
//elem.Value = "Name is required.";
args.IsValid = false;
return false;
}
}
</script>
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<asp:TextBox id="txtName" style="Z-INDEX: 105; LEFT: 107px; POSITION:
absolute; TOP: 38px" runat="server"></asp:TextBox>
<asp:Button id="cmdSave" style="Z-INDEX: 113; LEFT: 218px; POSITION:
absolute; TOP: 74px" runat="server" Text="Save"
OnClick="cmdSave_Click"></asp:Button>
<asp:CustomValidator ID="vldName" runat="server"
style="position:absolute; left: 268px; top: 39px;"
ErrorMessage="Name cannot be blank;"
ClientValidationFunction="ValidateName"
OnServerValidate="ValidateNameOnServer"
ControlToValidate="txtName">*</asp:CustomValidator>
<asp:Label ID="lblMessage" runat="server" style="position:absolute;
left: 104px; top: 122px;" Width="253px"></asp:Label>
</form>
</body>
</HTML>
Here's the code for ValidateNameOnServer in the codebehind:
protected void ValidateNameOnServer(object source,
ServerValidateEventArgs args)
{
if (args.Value.Length == 0)
{
args.IsValid = false;
}
else
{
args.IsValid = true;
}
}
I'd appreciate it if anyone could shed any light on what I am doing wrong,
or what I am missing out.
Epetruk
