WPF: OnKeyDown() not being called for space key in control derived from WPF TextBox

Question

In a WPF application, I have a control that I have derived from TextBox like this:

public class SelectableTextBlock : TextBox
{
    protected override void O         


        

Answer 1

Derive a say, RestrictKeysTextBox from TextBox.

public class RestrictKeysTextBox : TextBox
{
    ....
}

Override the OnPreviewKeyDown event in the RestrictKeysTextBox.

Put logic in this override like this:

if (e.Key == Key.Space)
{
    e.Handled = true;
}

Bind the instance of the RestrictKeysTextBox to your DataGrid.

That should work without overriding the OnPreviewKeyDown in the DataGrid and eliminate the associated problems.