Working with Arrow Keys in a WPF Textbox (C#)

问题

Is there any way to catch the Up/Down arrow keys in a WPF TextBox (System.Windows.Controls.Textbox) and allow them to alter the text? I've read about overiding the ProcessCmdKey method for a Windows Forms TextBox (System.Windows.Forms.TextBox), and it worked fine, but that TextBox is not nearly as flexible as the WPF one. Is there a similar method to accomplish this without having to use the old Windows Forms TextBox?

For my example, I have a TextBox that has a numeric text-mask. I want to be able increase/decrease the numeric value by using the up and down arrow keys.

回答1:

You could add event handlers to KeyUp and/or KeyDown, if that doesn't get what you need, using PreviewKeyUp and/or PreviewKeyDown should.

来源：https://stackoverflow.com/questions/3611638/working-with-arrow-keys-in-a-wpf-textbox-c