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I can't get this CustomValidator working.
In the <head>:
<script language="javascript" type="text/javascript">
function ValidateFile(sender, args){
alert("Hi");
args.IsValid = document.getElementById("fuFile").value != "" ||
document.getElementById("c101_c7").value != "";
}
</script>
In the body:
<asp:FileUpload ID="fuFile" runat="server" size="70"/>
<asp:TextBox ID="c101_c7" class="textbox" runat="server"/>
<asp:CustomValidator ID="vldFile" runat="server" ClientValidationFunction="ValidateFile"
ErrorMessage="You must either upload a file or provide a URL of a file."></asp:CustomValidator>
What should be in the args.IsValid if either the FileUpload or TextBox has to be filled in?
349
I find it helpful to actually let the code behind tell your JavaScript code what the client-side ID of the control is, since it's possible it's different than what you would think (based on what ASP .NET decides to do):
document.getElementById('<%=fuFile.ClientID %>');
<script type="text/javascript">
//<![CDATA[
function validateField(sender, args) {
var regExp = /(^[a-zA-Z]{2,50})$/;
var val = document.getElementById(sender.controltovalidate).value;
args.IsValid = regExp.test(val);
}
//]]>
</script>
answered Dec 31 '25 02:12
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