WPF点击事件中调用KeyDown事件

        private void imgSearchMpID_MouseUp(object sender, MouseButtonEventArgs e)
        {
            try
            {
                Module.Forms.FrmSearchMp lo_FrmSearchMp = new Module.Forms.FrmSearchMp();
                if (lo_FrmSearchMp.ShowDialog() == true)
                {
                    string ls_mpID = lo_FrmSearchMp.Tag.ToString();
                    txtsMpID.Text = ls_mpID;
                    KeyEventArgs keyEventArgs = new KeyEventArgs(Keyboard.PrimaryDevice, Keyboard.PrimaryDevice.ActiveSource, 0, Key.Enter);
                    txtsMPName_KeyDown(txtsMpID, keyEventArgs);
                }
            }
            catch (Exception lo_Ex)
            {
                string ls_ErrMsg = ls_TitleName + " imgSearchMpID_MouseUp Error,Message is " + lo_Ex.Message + " --> " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
                #region 錯誤的LOG處理
                StringBuilder lo_StringBuilder = new StringBuilder();
                lo_StringBuilder.AppendLine(ls_ErrMsg);
                BaseHelper.WriteLog(lo_StringBuilder);
                #endregion
                MessageBox.Show(ls_ErrMsg, ls_TitleName, MessageBoxButton.OK, MessageBoxImage.Error);
            }
        }