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Answer 1

+2 A:

are you just using a normal button to trigger the validation?

Are you implementing validationgroups anywhere else in this code?

andy 2009-04-08 03:27:41

Oh thank you! I didn't notice the button has a validation group.But I think I still got this part wrong. Do you know the correct way of doing it?args.IsValid = document.getElementById("fuFile").value != "" || document.getElementById("c101_c7").value != "";

2009-04-08 03:43:02

Answer 2

A:

You need to set the ControlToValidate Property on the custom validator. Currently the validator is not hooked up to any control.

Also, I'm sure you just didn't post this part of the markup, but you need to have a control that does a postback and causes validation as part of its postback. A button will work for this.

Daniel 2009-04-08 03:32:02

Answer 3

A:

I edited the question. The JavaScript wasn't called because of ValidationGroup of the button (thanks to Andy). But I still have problem with getting the values of .NET controls from the JavaScript

2009-04-08 03:47:57

Answer 4

A:

This works

document.getElementById("ctl00_ContentPlaceHolder1_fuFile").value

2009-04-08 05:22:03

Answer 5

+3 A:

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 %>');

Brandon Montgomery 2009-04-08 05:28:59

Answer 6

+1 A:

<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>

Hakan 2009-10-16 14:35:34

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ASP.NET CustomValidator client side

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