[Solved] GridView_SelectionChanging event?

[Mike McDougall]

I would like a way to validate the current row when selecting a different row and potentially cancel that navigation.  Is this possible?

[Milan]

Hello Mike McDougall,

Yes, it is possible to implement such behavior. Here is a sample implementation:

private bool changingSelection = false;

void gridView_SelectionChanged(object sender, SelectionChangeEventArgs e)

{

if (changingSelection)

return;

if (e.AddedItems.Count <= 0)

return;

changingSelection = true;

// custom validation logic       // do not allow the first item to be selected

if (this.gridView.Items.IndexOf(e.AddedItems[0]) == 0)

{

this.gridView.SelectedItems.Remove(e.AddedItems[0]);

// revert old selection if desired

foreach (var previouslySelectedItem in e.RemovedItems)

this.gridView.SelectedItems.Add(previouslySelectedItem);

}

changingSelection = false;

}

You just have to subscribe to the SelectionChanged event and change the SelectedItems collection according to your rules.

Hope this works.

All the best,
Milan
the Telerik team

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