When using GridClientSelectColumn is it possible to prevent some rows being selected on a condition?

[Mark]

Hi

When using GridClientSelectColumn is it possible to prevent some rows being selected on a condition?

I tried using the grid client event "OnRowSelecting" with the following function:

function grdSearchResult_RowSelecting(sender, e)
{
    // Check if this row should be selected
    if(e.get_gridDataItem().get_element().cells[SELECT_COL].firstChild.disabled == true)

        e.set_cancel(true);
}

In this particular case I'm checking if the row has the selected checkbox disabled or not.

This doesn't work first time (e.get_gridDataItem() is NULL), however 2nd time onwards it works fine.

Am I taking the right approach?


Kind regards

Mark Eaton

[Yavor]

Hi Mark,

the logic of the approach is correct - you can cancel out the selection conditionally. The error may be caused by some server side logic, for disabling the checkboxes. Can you provide some additional information, as to how the checkboxes are disabled, or if there is anything that would allow me to replicate this behavior locally.

Best wishes,
Yavor
the Telerik team

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[Mark]

Hi Yavor

I am using the following server side code to disable the checkbox:

protected void grdSearchResult_ItemDataBound(object source, GridItemEventArgs e)
{
    TableCell col = null;
    Image img = null;
    CheckBox chk = null;

    if (e.Item is GridDataItem)
    {
        col = ((Telerik.Web.UI.GridDataItem)(e.Item))["clmSelect"];

        if (col != null)
        {
            // The checkbox is always the 1st control for a Telerik select column
            chk = (CheckBox)col.Controls[0];

            if (chk != null)
                chk.Enabled = false;
        }
    }
}

Hope this helps


Kind regards

Mark Eaton

[Yavor]

Hello Mark,

Attached to this message, is a sample application, which handles the required functionality.
I hope it helps.

Best wishes,
Yavor
the Telerik team

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[Mark]

Hi

With the Javascript event from the attached project:

      function rowSelecting(sender, eventArgs)
      {     
        if(sender.get_masterTableView().getCellByColumnUniqueName(sender.get_masterTableView().get_dataItems()[eventArgs.get_itemIndexHierarchical()],"clmSelect" ).childNodes[0].disabled == true)
        eventArgs.set_cancel(true);     
      }


I find this works beautifully in I.E 7 however although the set_cancel(true) is reached in Safari 3 and Firefox 3 they seem to be ignoring it.

I am using Telerik AJAX 2008 Q2.

Is there anything I need to do to make it work for Safari 3 and Firefox 3?


Kind regards

Mark Eaton

[Pavel]

Hi Mark,

I have modified the sample to work with all browsers. You can find it attached to this post.

Best wishes,
Pavel
the Telerik team

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[Mark]

Thanks, works beautifully!


Kind regards

Mark Eaton