Trapping backspace character key presses?

Question

This topic probably belong here rather than the c# forum... When tying to allow only number into a text box I added code which works BUT as a side effect I cant actually use backspace anymore to delete typing errors :-( Any ideas on how to fix this? I want to trap the backspace to allow it. I tried stuff like: if(e.KeyChar.Equals(Keys.Back)) { ... } But this doesnt seem to work :-( Any ideas?

joy.simpson · Answer

(I don't know how the face got into the previous post. It should be the number 8.) The ASCII character code for the backspace key is 8. Just add this line to the code: private void textBox1_KeyPress(object sender System.Windows.Forms.KeyPressEventArgs e) { if (e.KeyChar != 8) if (char.IsNumber(e.KeyChar) == false) { e.Handled = true; } }

joy.simpson · Answer

I replied to your post in the C# forum several days ago. Why didn't you acknowledge my response there? Did you get it to work? If so where is your thanks? The ASCII character code for the backspace key is 8. Just add this line to the code: private void textBox1_KeyPress(object sender System.Windows.Forms.KeyPressEventArgs e) { if (e.KeyChar != 8) if (char.IsNumber(e.KeyChar) == false) { e.Handled = true; } }

Mykonine · Answer

Keys.Back isn't the backspace key.