关于有条件的掩藏DBGridEh某一单元格的值，在HideDuplicates的基础上加上相应条件的方法

  TCustomDBGridEh = class(TCustomGridEh, IInplaceEditHolderEh {$IFNDEF CIL}, IUnknown {$ENDIF})
   ...

   FCol0Left:Integer;//添加变量用作记下第一列的焦点  //by thinkzhong

   ...

   FColCellParamsEh: TColCellParamsEh;
   FColCellParamsEh1: TColCellParamsEh;//添加变量 //by thinkzhong

   FUseduplicatekeyField:String; //by thinkzhong
   ...

   property UseduplicatekeyField: String read FUseduplicatekeyField write FUseduplicatekeyField; //thinkzhong
   ...

 

  TDBGridEh = class(TCustomDBGridEh)

  property UseduplicatekeyField; // thinkzhong

 

  constructor TCustomDBGridEh.Create(AOwner: TComponent);
  ...

   FColCellParamsEh := TColCellParamsEh.Create;
   FColCellParamsEh1 := TColCellParamsEh.Create;//建立变量 //by thinkzhong

   ...

 

  destructor TCustomDBGridEh.Destroy;

   FreeAndNil(FColCellParamsEh);
   FreeAndNil(FColCellParamsEh1);//释放变量 //by thinkzhong

 

   {new DrawCell}

   procedure TCustomDBGridEh.DrawCell(ACol, ARow: Longint; ARect: TRect; AState: TGridDrawState);
   var

   ...

   Value: string;
   Value1: string//添加变量 //by thinkzhong

   DrawColumn: TColumnEh;
   DrawColumn1: TColumnEh; //添加变量 //by thinkzhong

   DrawSubLine: Boolean;//添加变量 //by thinkzhong

   ...

   //在变量里添加过程 //by thinkzhong

   function FieldExit(Dataset:TDataSet;FieldName:String):Boolean;
    var
  &n