HowTo: Select Items with LeftMouseButton in C1TileListBox

The C1TileListBox for WPF provides the functionality to select and deselect Items by default at the RightMouse button's click. This blog explains an approach to select and deselect items at the LeftMouse button's click. To implement the same, we will make use of its MouseLeftButtonUp and PreviewMouseRightButtonDown events.

Implement the functionality at the LeftMouseButton click

Private Sub tileListBox_MouseLeftButtonUp(sender As Object, e As MouseButtonEventArgs) Handles tileListBox.MouseLeftButtonUp  
 Dim index As Integer = tileListBox.GetIndexAt(e.GetPosition(tileListBox))  
 Dim obj As Item = CType(tileListBox.Items(index), Item)  

Dim lst As List(Of Object) = CType(tileListBox.SelectedItems, Object()).ToList()  

If Keyboard.IsKeyDown(Key.LeftCtrl) Or Keyboard.IsKeyDown(Key.RightCtrl) Then  
 lst.Add(obj)  
 flag = True  
 Else  
 lst.Add(obj)  
 If flag = True Then  
 lst.Clear()  
 flag = False  
 End If  
 End If  
 tileListBox.SelectedItems = lst.ToArray()  
 End Sub  

Handle the behaviour at RightMouseButton Click

Private Sub tileListBox_PreviewMouseRightButtonDown(sender As Object, e As MouseButtonEventArgs) Handles tileListBox.PreviewMouseRightButtonDown  
 e.Handled = True  
 End Sub  

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