设置DBGrid当前行的颜色

定义个子类MyDBGrid继承TDBGrid，以提供访问父类保护成员的接口。
type
  MyDBGrid=class(TDBGrid)
  private

  public
    function GetRow:integer;
    function IsCurrent:boolean;
end;

function MyDBGrid.GetRow: integer;
begin
  result:=row;
end;

function MyDBGrid.IsCurrent: boolean;
begin
  result:=(DataLink.ActiveRecord=row-1);
end;

判断是否是当前行。

type
  TGlobal=class

      class function IsCurrentRow(AMyDBGrid:MyDBGrid):boolean;

end;

class function TGlobal.IsCurrentRow(AMyDBGrid: MyDBGrid): boolean;
begin
  result:=AMyDBGrid.IsCurrent;
end;

在DrawColumnCell事件中。

procedure TFormMain.MyDBGridDrawColumnCell(Sender: TObject; const Rect: TRect;
  DataCol: Integer; Column: TColumn; State: TGridDrawState);
begin
  if TGlobal.IsCurrentRow(MYDBGrid(Sender)) 

    begin
        (Sender as TDBGrid).Canvas.Brush.Color :=$000080FF;

    end
    else
    begin
      if (Sender as TDBGrid).DataSource.DataSet.RecNo  mod 2 =0 then
        (Sender as TDBGrid).Canvas.Brush.Color :=rgb(246,246,246);   //$00F3F3F3; //定义背景颜色
    end;
    (Sender as TDBGrid).DefaultDrawColumnCell(Rect,DataCol,Column,State);

end;

效果：