How to get values of additional fields client side

[Julie]

Hi Telerik Support,
    I have been working with the Upload control, and do not see how to get the values of the additional fields before postback.
    I would like to validate the information before they submit to the server.  I tried using OnClientSubmitting,  but have not been able to figure out how to get to my control which is a description field an example on how I would accomplish this would be greatly appreciated. 
Thanks in advance for the help.
Julie

[Genady Sergeev]

Hi Julie,

You can use the $get function to obtain the desired html element. Example: Consider having the following function that adds a description text box to every single file input.

function onClientAddedHandler(sender, eventArgs) {
            var inputRow = eventArgs.get_row();
            var uList = inputRow.parentNode;

            // add desctiption input
            rowDescription = document.createElement("li");
            uList.insertBefore(rowDescription, inputRow);

            var inputDesc = document.createElement("input");
            inputDesc.type = "text";
            inputDesc.id = inputDesc.name = sender.getID("description");

            rowDescription.appendChild(labelDesc);
            rowDescription.appendChild(inputDesc);
        }

So, the ID of the added input is compound of the Parent control id + "description". This is, if  your upload
ID is RadUpload1, then the id of the input is RadUpload1description0/1/2/3/4 etc.

For your convenience I have prepared sample demo demonstrating the approach. You can find it as an attachment.

Regards,
Genady Sergeev
the Telerik team

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[Julie]

Thanks for the help Genady!!!