Delphi控件cxGrid 如何动态创建列?

var i: Integer;   
  Column: TcxGridDBColumn;   
  cxView: TcxGridDBTableView;     
begin   
  cxView := Self.Levels[0].GridView as TcxGridDBTableView;   
  if cxView.DataController.DataSource  nil then   
    if cxView.DataController.DataSource.DataSet  nil then   
    begin   
      cxView.ClearItems;   
      for i:=0 to  cxView.DataController.DataSource.DataSet.FieldCount-1 do    
        begin   
         Column := cxView.CreateColumn;   
         Column.DataBinding.FieldName := cxView.DataController.DataSource.DataSet.Fields[i].FieldName;   
         Column.PropertiesClass := TcxTextEditProperties;   
      end;   
    end;   
end;  

for i := 0 to Query.FieldCount - 1 do   
begin   
  cxGrid.CreateColumn;   
  cxGrid.columns[i].DataBinding.FieldName := Query.Fields[i].DisplayName;   
  cxGrid.Columns[i].Caption := ‘XXXX‘;   
  cxGrid.Columns[i].Width   :=80;   
end;

procedure TFrmRuleEdit.CreateCols;
var
Column: TcxGridDBColumn;
begin
cdsPowerPrj.First;
while not cdsPowerPrj.Eof do
begin
Column := viewPower.CreateColumn;
Column.Caption := cdsPowerPrj.FieldByName(‘description‘).Text;
Column.DataBinding.FieldName := cdsPowerPrj.FieldByName(‘powerName‘).Text;
Column.PropertiesClassName := ‘TcxCheckBoxProperties‘;
Column.Width := 50;
cdsPowerPrj.Next;
end;
end;