C# 文本框只能输入数字和退格键

C# 文本框只能输入数字和退格键

private void TextBox_KeyPress(object sender, KeyPressEventArgs e)
  {
   if(e.KeyChar!=8&&!Char.IsDigit(e.KeyChar))
   {
     e.Handled = true;
   }
  }
或者

private void TextBox_KeyPress(object sender, KeyPressEventArgs e)
  {
   if(e.KeyChar!='\b'&&!Char.IsDigit(e.KeyChar))
   {
     e.Handled = true;
   }
  }