/// 
 /// 回车切换控件 /// 
 ///  ///  private void FrmDataCheckRule_KeyPress(object sender, KeyPressEventArgs e)        {            if (e.KeyChar ==13)            {                if ((ActiveControl is TextBoxX))                {                    //textBoxX可多行操作时不跳转                    if (!(ActiveControl as TextBoxX).Multiline)                        System.Windows.Forms.SendKeys.Send("{tab}");                }                else                    System.Windows.Forms.SendKeys.Send("{tab}");                // MessageBox.Show(ActiveControl.Name);            }        }

加代码前

this.KeyPreview = true;