[Solved] How to disable rows programmtically?

[klogand]

I found the IsEnabled property on the GridViewRow, but can't figure out how to change it programmatically. I have a toggleButton in a row. When that is selected, I need to select the current row and disable all other rows and buttons. ISelectable is a simple interface that has an IsSelected boolean property. I can't access the rows from the this.playlistItemsGridView. Any suggestions?

private void ToggleButton_Click(object sender, System.Windows.RoutedEventArgs e)
{
// can only select one at time
// set all isSelected to false except this one
// the item must implement ISelectable
var selectedItems = this.playlistItemsGridView.Items.SourceCollection.Cast<ISelectable>().Where(element => element.IsSelected);
if (selectedItems.Count() == 0)
{
selectedItem.IsSelected = true;
this.playlistItemsGridView.SelectedItem = selectedItem;
}
else if ((ISelectable)selectedItems.First() == selectedItem)
{
// if the selectedItem was unchecked, set to false and return
selectedItem.IsSelected = false;
this.playlistItemsGridView.SelectedItem = null;
return;
}
else
{
((ISelectable)selectedItems.First()).IsSelected = false;
selectedItem.IsSelected = true;
this.playlistItemsGridView.SelectedItem = selectedItem;
}
}

[Vlad]

Hello,

 If you want to disable only currently visible rows you can use the approach from this demo otherwise you should use RowStyleSelector.

Regards,
Vlad
the Telerik team

[klogand]

The demo code is working for me. One thing to note that if EnableRowVirtualization = True, then the row returned from the GridViewRow row = this.GridView1.ItemContainerGenerator.ContainerFromItem(item) as GridViewRow; may be null when you aren't expecting it.

Is there an event that fires when new rows are being added to memory when scrolling up or down? For now I just turned row virutalization off, since this table shouldn't get too big.

[Vlad]

Hi,

 You can use RowLoaded/RowUnloaded events. 

Best wishes,
Vlad
the Telerik team