GridView中回车控制焦点以及DataGridView的焦点

         //回车切换焦点方法，只需在界面设置控件的TabIndex即可，以后用

         protected   override   bool  ProcessCmdKey( ref   Message  msg,  Keys  keyData)

        {

             if  ((!(ActiveControl  is   Button )) && (keyData ==  Keys .Up || keyData ==  Keys .Down || keyData ==  Keys .Enter))

            {

                 if  (keyData ==  Keys .Enter)

                {

                    System.Windows.Forms. SendKeys .Send( "{TAB}" );

                     return   true ;

                }

                 if  (keyData ==  Keys .Down)

                    System.Windows.Forms. SendKeys .Send( "{TAB}" );

                 else

                     SendKeys .Send( "+{Tab}" );

                 return   true ;

            }

             else

                 return   base .ProcessCmdKey( ref  msg, keyData);

        }

  

      // GridView中回车横向移焦点，保存好些方法

         protected   override   bool  ProcessCmdKey( ref   Message  msg,  Keys  keyData)

        {

            enterkey =  false ;

             if  (keyData ==  Keys .Enter)

            {

                 if  ( this .dataGridView1.IsCurrentCellInEditMode)

                {

                    enterkey =  true ;

                     if  ( this .dataGridView1.CurrentCell.ColumnIndex <  this .dataGridView1.ColumnCount - 1)

                    {

                         if  ( this .dataGridView1.CurrentCell.ColumnIndex == 5)

                        {

                             DataRow  row = dt.NewRow();

                            row[ "ID" ] = dt.Rows.Count + 1;

                            row[ "QrCode" ] =  "" ;

                            row[ "JiuKuanName" ] =  "" ;

                            row[ "ShuLiang" ] =  "0" ;

                            row[ "DanJia" ] =  "0" ;

                            row[ "JinE" ] =  "0" ;

                            dt.Rows.Add(row); //添加新行 

                             this .dataGridView1.DataSource = dt;

                            dataGridView1.CurrentCell = dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells[2];

                             return   false ; ;

                        }

                         else

                        {

                             this .dataGridView1.CurrentCell =  this .dataGridView1[ this .dataGridView1.CurrentCell.ColumnIndex + 3, this .dataGridView1.CurrentCell.RowIndex];

                        }

                    }

                }

            }

             return   base .ProcessCmdKey( ref  msg, keyData);

        }