procedure TForm1.Button1Click(Sender: TObject); var FCommIntf: IFDPhysCommand; //FireDAC.Phys.Intf FTab: TFDDatSTable; //FireDAC.DatS begin FTab := TFDDatSTable.Create; FDConnection1.ConnectionIntf.CreateCommand(FCommIntf); FCommIntf.CommandText := ‘select * from zfxx‘; //FCommIntf.Prepare(‘select * from tjzfdb.dbo.zfxx‘); FCommIntf.Define(FTab); //FCommIntf.Open; FCommIntf.Fetch(FTab); Caption := FTab.Rows.Count.ToString(); end; procedure TForm1.Button2Click(Sender: TObject); var oCommIntf: IFDPhysCommand; oSchAdapt: IFDDAptSchemaAdapter; oAdapt: IFDDAptTableAdapter; //FireDAC.DApt.Intf U begin { uses FireDAC.Stan.Factory, FireDAC.DApt; } //FDCreateInterface(IFDDAptSchemaAdapter, oSchAdapt); //oAdapt := oSchAdapt.TableAdapters.Add; //上面的2步可以用下面一行代码代替 FDCreateInterface(IFDDAptTableAdapter, oAdapt); FDConnection1.ConnectionIntf.CreateCommand(oCommIntf); if oAdapt.SelectCommand=nil then oAdapt.SelectCommand := oCommIntf; oCommIntf.CommandText := ‘select * from zfxx‘; oAdapt.Define; oAdapt.Fetch(True); Caption := oAdapt.DatSTable.Rows.Count.ToString(); end;
基本上是从DEMO上照搬的,初步理解内部情况。
时间: 2024-11-05 14:48:14