Postback when selecting multiple rows with Shift-key

[Mikael]

Hi!

I am trying to overcome a limitation in RadGrid (which I think is still around, I am using version 2010.1.309.35):
If AllowMultiRowSelection = true, and the user selects multiple rows by holding down the Shift-key, there is no postback even if

EnablePostBackOnRowClick = true.

There is a workaround described here:
http://stackoverflow.com/questions/7424397/telerik-radgrid-onrowselected-events-all-done-event-for-multiple-selection/14381154#14381154

I have slightly modified the client code to look like this:

function IW_RowSelected(sender, eventArgs) {
    var e = eventArgs.get_domEvent();
    if (!sender.AllowMultiRowSelection || !e.shiftKey) {
        // Multiple row not enabled or shift not pressed, nothing to do
        return;
    }

    if (window.rowSelectedTimeout) {
        // If selecting multiple rows, clear the previous row's rowSelectedTimeout
        window.clearTimeout(window.rowSelectedTimeout);
    }

    rowSelectedTimeout = window.setTimeout(function() {
        window.rowSelectedTimeout = null;
        alert('rows selected'); // Should force a postback here
    }, 10);
}

And it works fine. There is just one piece missing: How do I force a postback when the "last" row has been selected? Right now, all I do is an "alert('rows selected')", but I need to force a postback so that my server-side code can detect which rows are currently selected.

If it matters, I use an ASP.NET UpdatePanel to get partial updates.

Thanks!
/Fredrik

[Kostadin]

Hi Fredrik,

You could call rebind() function instead showing alert message. Check out the following code snippet.

$find("<%= RadGrid1.ClientID %>").get_masterTableView().rebind();

Kind regards,
Kostadin
the Telerik team

[Mikael]

Thanks for your reply!

The rebind() method works in a way (a postback will be posted to the server). However, this will cause the grid to lose its selection state, at least with the server-side code I currently have. Perhaps I could code around this on the server-side, but it would make the code more complex.

I was hoping there is a way to mimic the exact same behaviour as when the user selects a single row.

Example:
1. The user has previously selected row A..
2. The user selects row B. This causes a postback, and the selected rows (as detected on the server side) are  A and B.
This is the normal behaviour.
3. While holding down the Shift-key, the user clicks row E. This should selects rows A, B, C, D and E on the client. This should cause a postback, and the selected rows (as detected on the server side) are A, B, C, D and E.

Hope I make myself understood.
Thanks!
/Fredrik

[Kostadin]

Hi Fredrik,

Our developers have already addressed this issue and the selected event is properly executing with the current version of RadControls.

Regards,
Kostadin
the Telerik team