How to add a new line on TAB key in WPF dataGrid

I want to add a new line in my datagrid when I press 'TAB' key on开发者_Go百科 last cell of the datagrid.

I am using MVVM pattern to do this. I have came with a solution, I assinged Tab key to the Input binding of the datagrid:

    <DataGrid.InputBindings>
       <KeyBinding Command="{Binding Path=InsertNewLineCommand}" Key="Tab"></KeyBinding>
   </DataGrid.InputBindings>

And added following code to InsertNewLineCommand:

private void ExecuteInsertNewLineCommand()
    {
        //Checked is SelectedCell[0] at last cell of the datagrid
        {
            InsertNewLine();
        }
    }

But the problem is ON ADDING KEYBINDING='TAB' MY NORMAL TAB FEATURE ON THE GRID DISABLES (MOVING TO NEXT CELL AND SO...)

Just determine if you are on the last column then execute your command.

I am using PreviewKeyDown, so I could test the logic, but you can put that in your executeCommand method. Anyway, this should get you started:

<DataGrid PreviewKeyDown="DataGrid_PreviewKeyDown" SelectionUnit="Cell" ....

private void DataGrid_PreviewKeyDown(object sender, KeyEventArgs e)
{
    if (!Keyboard.IsKeyDown(Key.Tab)) return;
    var dataGrid = (DataGrid) sender;

    var current = dataGrid.Columns.IndexOf(dataGrid.CurrentColumn);
    var last = dataGrid.Columns.Count - 1;

    if (current == last)
         ExecuteInsertNewLineCommand();

}