Best way to make sure a description field is added?

[danparker276]

I want to make sure someone puts in a Description before they upload a file.  Not like the example where the description is put in after. I can do it with manual upload like:

function startManualUpload() {
    var tb = $find('<%=tbFileDesc.ClientID%>');
    var tbtxt = tb._text.length;
    if (tbtxt == 0) {
 //write some error
    }
    else {
        var upload = $find('<%=radUpAssoc.ClientID%>');
        upload.startUpload();
    }

}

But then I want to add the description to my AsyncUploadConfiguration.  I'm setting this on the server side though.
How can I add on to my AsyncUploadConfiguration from here?  I'm not so good at javascript so maybe this is easy.

I guess I could do a Response.write with the startmanualUpload function, but that was acting a bit strange.

[Hristo Valyavicharski]

Hi Dan,

AsyncUploadConfiguration is used to pass custom information from the page to the handler. It exposes these properties. AsyncUploadConfiguration cannot be modified on the client. To prevent file uploading if the Description field is empty you can cancel uploading:

function OnClientFileUploading(sender, args) {
    var tb = $find('<%=tbFileDesc.ClientID%>');
    var tbtxt = tb._text.length;
    if (tbtxt == 0) {
        //cancel file uploading
        args.set_cancel(true);
        //write some error
        alert('Enter description');
    }
}

Regards,
Hristo Valyavicharski
the Telerik team