???????? ??? ??????????? ?? ????? C# ?? ????? ???? trap ???? ????

????? ?? ???? ????

????? Trap ??? ????

class MyDataGrid : System.Windows.Forms.DataGrid
{
   protected override bool ProcessCmdKey(ref Message msg, Keys keyData)	
   {
   }
}	
				

????? ?? ???? ????

Implement the Overridden Method

const int WM_KEYDOWN = 0x100;
const int WM_SYSKEYDOWN = 0x104;
   
if ((msg.Msg == WM_KEYDOWN) || (msg.Msg == WM_SYSKEYDOWN))
{
   switch(keyData)
      {
         case Keys.Down:
            Console.WriteLine("Down Arrow Captured");
            break;
      
         case Keys.Up:
            Console.WriteLine("Up Arrow Captured");
            break;
 
         case Keys.Tab:
            Console.WriteLine("Tab Key Captured");
            break;
 
         case Keys.Control | Keys.M:
            Console.WriteLine("<CTRL> + m Captured");
            break;
 
         case Keys.Alt | Keys.Z:
            Console.WriteLine("<ALT> + z Captured");
            break;
      }
}
				

????? ?? ???? ????

?? ?????? ?????

1. ??? ?? Windows ???????? ????????? ????????? ??? ??? ????? C#.
2. ???? ?? ??? ??? ?????UserControl1, ?? ???? ??? ?? ??? ?? ??? ?????MyDataGrid.
3. ???????? ????????? ?? ??? ??? ?? ?????, ?? ??? ??? ?? ????? ?????? ?? ?????

   public class MyDataGrid : System.Windows.Forms.UserControl
   					

   ?????:

   public class MyDataGrid : System.Windows.Forms.DataGrid
   					Note In Visual Studio 2005 or Visual Studio 2008, change the following line of code: 
   public partial class MyDataGrid : System.Windows.Forms.DataGrid 

4. ???? ?? ??? ????? ???? ??????MyDataGrid????:

   protected override bool ProcessCmdKey(ref Message msg, Keys keyData)	
   {
      const int WM_KEYDOWN = 0x100;
      const int WM_SYSKEYDOWN = 0x104;
   
      if ((msg.Msg == WM_KEYDOWN) || (msg.Msg == WM_SYSKEYDOWN))
      {
         switch(keyData)
         {
            case Keys.Down:
               this.Parent.Text="Down Arrow Captured";
               break;
         
            case Keys.Up:
               this.Parent.Text="Up Arrow Captured";
               break;
    
            case Keys.Tab:
               this.Parent.Text="Tab Key Captured";
               break;
    
            case Keys.Control | Keys.M:
               this.Parent.Text="<CTRL> + M Captured";
               break;
    
            case Keys.Alt | Keys.Z:
               this.Parent.Text="<ALT> + Z Captured";
               break;
         }				
      }
   
      return base.ProcessCmdKey(ref msg,keyData);
   }
   					

5. ????????? ??????
6. ??? ?? Windows ????????? ????????? ??? ??? ????? C#. ???????? ??? ??, Form1 ??? ???? ??????? ?? ???? ???
7. ????? ????????????? ??,????? ????? ???????? ????
   
   ???:Visual Studio 2005 ?? Visual Studio 2008, ??? ????? ????????? ????? ???? ?????.
8. ????? ????.NET ????? ?????? ?? ????? ????..
9. ????? ????,???????, ????????/DLL ?? ??? ????? ??? ??, ?? ???? ???OK.
10. ????????MyDataGrid?? ????? ????? ??? ????? ???? ??? Form1 ?? ?? ????????:: ?? ????? ?? ???? ??? ??? ??? ????? ??? ????????? ???? ?? ??? ????? ?? ??? ????? ???? ?? ????? ?? ????
    
    
11. ??????? ?? ??? ????? ??? ????? ??? ??????? ?? ??? ?? ???? ?? ???? ?? ??????? ???? ?? ???????? ???? ?? ??? ?? ???? ????

    // This structure is only used in providing sample data for the grid.
    public struct gridData
    {
       private string make;
       private int year;
    
       public gridData(string n,int y)
       {
          make=n;
          year=y;
       }
    
       public string Make
       {
          get{return make;}
          set{make = value;}
       }
    
       public int Year
       {
          get{return year;}
          set{year=value;}
       }
    }
    					

12. ??????? ???? ?? ???, "Windows ??????? ??????? ??? ????? ???? ???" ??? ?? ????? ????? ????? ??? ??????:

    protected gridData[] dataArray=new gridData[5];
    					

13. ????? ??? ????????? ????Form1 ?????:

    // Create some sample data.
    dataArray[0]=new gridData("ford",1999);
    dataArray[1]=new gridData("chevrolet",1999);
    dataArray[2]=new gridData("plymouth",1988);
    dataArray[3]=new gridData("honda",1999);
    dataArray[4]=new gridData("fiat",1987);
    
    // Assign the data to the grid.
    myDataGrid1.DataSource=dataArray;
    					

14. ????? ?????, ?? ??????? ??????????? trapped (UP ???, ???? ???, TAB, CTRL + M ?? ALT + Z) ?? ??? ??? ?? ???? ?? ?????? ????? ?????? ??????? ?? ???-?? ????????? ????? ?????? ?? ??? ?????? ?? ???

????? ?? ???? ????