c# TextBox只允许输入数字，禁用右键粘贴，允许Ctrl+v粘贴数字

       //TextBox.ShortcutsEnabled为false  禁止右键和Ctrl+v
        private void txtNumber_KeyPress(object sender, KeyPressEventArgs e)
        {
            //只允许输入数字，粘贴数字
            if (!(Char.IsNumber(e.KeyChar) || e.KeyChar == (char)8))
            {
                e.Handled = true;
            }
        }
        //允许Ctrl+v粘贴数字
        private void txtNumber_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.KeyData == (Keys.Control | Keys.V))
            {
                if (Clipboard.ContainsText())
                {
                    try
                    {
                        Convert.ToInt64(Clipboard.GetText());  //检查是否数字
                        ((TextBox)sender).SelectedText = Clipboard.GetText().Trim(); //Ctrl+V 粘贴  
                        if (((TextBox)sender).TextLength > 10)
                        {
                            ((TextBox)sender).Text = ((TextBox)sender).Text.Remove(10); //TextBox最大长度为10  移除多余的
                        }
                    }
                    catch (Exception)
                    {
                        e.Handled = true;
                        //throw;
                    }
                }
            }
        }