D.AppendData(P.GetRecords(-1, i, MetaDataOption), False);finallyS.Free; D.Free; P.Free;end;end; An exception prompt "Trying to append data to a non-partial dataset". However, the following code works: varS, D: TClientDataSet; P: TDataSetProvider; i: integer;beginS := TCl...
用好FDMemTable代替之前的ClientDataSet,以前ClientDataSet内存表转换太繁琐了步骤。 TClientDataSet *cds = new TClientDataSet(this); DataSetProvider1->DataSet = dm->ADOQueryPub; cds->ProviderName = "DataSetProvider1"; cds->Open(); c++智能指针 #include <memory> //For STL auto_ptr class std::auto_p...
FireDAC.Comp.Client 用好FDMemTable代替之前的ClientDataSet,以前ClientDataSet内存表转换太繁琐了步骤。 TClientDataSet *cds = new TClientDataSet(this); DataSetProvider1->DataSet = dm->ADOQueryPub; cds->ProviderName = "DataSetProvider1"; cds->Open(); c++智能指针 #include <memory> //For STL auto_ptr...
6 TclientDataSet字段新旧值,即网格列对应字段修改前后值都有记载.old值为未修改之前的值: cds1.FieldByName('关联比例').NewValue < cds1.FieldByName('关联比例').OldValue 7 DBGridEh1.SumList.SumCollection[1].SumValue中的"1"表示统计类型为ftsum,且是该网格中的第二2个使用ftsum DBGridEh1.SumList.Sum...
Opening the TClientDataSet populates it using the TDataSetProvider. The provider, in turn, opens the TFDQuery. The TFDQuery has UpdateOptions.RequestLive set to true, which causes it to fetch its metadata, in particular the ProviderFlags of each TField. FireDAC retrieves the unique identifying ...
delphi新版内存表FDMemTable c++builder XE 官⽅demo最全60多个 http://community.embarcadero.com/blogs?view=entry&id=8761 FireDAC.Comp.Client ⽤好FDMemTable代替之前的ClientDataSet,以前ClientDataSet内存表转换太繁琐了步骤。TClientDataSet *cds = new TClientDataSet(this);DataSetProvider1->DataSet = dm->...
用好FDMemTable代替之前的ClientDataSet,以前ClientDataSet内存表转换太繁琐了步骤。 TClientDataSet *cds = new TClientDataSet(this); DataSetProvider1->DataSet = dm->ADOQueryPub; cds->ProviderName = "DataSetProvider1"; cds->Open(); c++智能指针
用好FDMemTable代替之前的ClientDataSet,以前ClientDataSet内存表转换太繁琐了步骤。 TClientDataSet *cds = new TClientDataSet(this); DataSetProvider1->DataSet = dm->ADOQueryPub; cds->ProviderName = "DataSetProvider1"; cds->Open(); c++智能指针
大家都知道TClientDataSet的Delta属性保存数据集的变化,但是Delta是OleVariant类型的属性,这样如果用Delphi写Webservice,就有需要把它转成XML,特别是其他语言也要用这个Webservice的时候,因为如果Delta能和XML相互转换,Delta包的结构就是透明的了。而TClientDataSet却没有提供DeltaXML这样的属性,之前在网上找了一下,发现网上...
var b: TClientDataset; begin b := cds_somethin; b.Close; b.CreateDataSet; b.Insert; /* if (b.FieldByName('DT_Something').OldValue <> Null) and (b.FieldByName('DT_Something').OldValue <> Unassigned) then ShowMessage('Something wrong!!!') else ShowMessage('Normal')...