WPF DataGridTemplateColumn. Am I missing something?

Question

     
        
            
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Answer 1

Here is my approach. Its very close to @Nalin Jayasuriya answer, but I didn't want to create a style. Also this solution selects the text in the TextBox. Anyway - the XAML for the hole DataGrid looks like this.

And the code-behind.

private void TextBox_GotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
{
    try
    {
        ((TextBox)sender).SelectAll();
    }
    catch (Exception ex) { GlobalDebug.debugForm.WriteText(ex); }
}

private void TextBox_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
    try
    {
        // If its a triple click, select all text for the user.
        if (e.ClickCount == 3)
        {
            ((TextBox)sender).SelectAll();
            return;
        }

        // Find the TextBox
        DependencyObject parent = e.OriginalSource as UIElement;
        while (parent != null && !(parent is TextBox))
        {
            parent = System.Windows.Media.VisualTreeHelper.GetParent(parent);
        }

        if (parent != null)
        {
            if (parent is TextBox)
            {
                var textBox = (TextBox)parent;
                if (!textBox.IsKeyboardFocusWithin)
                {
                    // If the text box is not yet focussed, give it the focus and
                    // stop further processing of this click event.
                    textBox.Focus();
                    e.Handled = true;
                }
            }
        }
    }
    catch (Exception ex) { GlobalDebug.debugForm.WriteText(ex); }
}

For a more info, have a look at my blog: http://blog.baltz.dk/post/2014/11/28/WPF-DataGrid-set-focus-and-mark-text