如何使用字段文本而不是字段值导出TADODataSet [英] how to export TADODataSet with Fields Texts not Fields Values

问题描述

我有一个与存储过程相连的TADODataSet，该存储过程产生40列* 800行
，TADODataSet有一个AfterOpen事件，为该事件分配一个OnGetText就是字段
，如：

I have a TADODataSet connected with a stored procedure which produce 40 Columns * 800 Row the TADODataSet has an AfterOpen event which assign an OnGetText for it is Fields like :

procedure TForm1.ADODataSet1AfterOpen(DataSet: TDataSet);
begin
  with DataSet do 
  begin
    Fields[4].DisplayLabel:=TR(AS2); //RefId
    Fields[4].DisplayWidth:=8;
    Fields[4].Tag:=1;
    Fields[4].OnGetText:=RefGetText;

    Fields[5].DisplayLabel:=TR(AS3); //ClientId
    Fields[5].DisplayWidth:=8;
    Fields[5].Tag:=1;
    Fields[5].OnGetText:=ClientGetText;
  end;
end;


procedure TForm1.RefGetText(Sender: TField; var Text: String; DisplayText:   Boolean);
begin
  if Sender.DataSet.FieldByName('RelStoreId').AsString='' then
    Text:='NO REF ID'
  else
    KHDM.RefGetText(Sender,Text,DisplayText);
end;

procedure TForm1.ClientGetText(Sender: TField; var Text: String; DisplayText:   Boolean);
begin
  if Sender.DataSet.FieldByName('ClientId').AsString='' then
    Text:='Client ID is not Assigned'
  else
    KHDM.ClientGetText(Sender,Text,DisplayText);
end;

我想将数据导出为带有文本
的XML在域和记录上循环，因为它非常慢
我想要诸如大容量复制之类的东西流式传输或类似的东西

I want to export the data to an XML with the texts I don't want to make a loop on fields and records because it is very slow I want something like bulk copy to stream or something like that

我无法更改我的方式正在工作，因为大约有800个模块使用相同的方式...

I cannot change the way I'm working because there are around 800 module which using the same way...

请帮助。

推荐答案

我以前使用过这种技术-对您有帮助吗？
我可以看到输出的长度是个问题，但是您可能可以通过某种方式来简化它。也许看看ClientDataset.SavetoFile（）方法

I have used this kind of technique before - Any Help to you ? I can see the length of the output is a problem but you might be able to fettle it somehow. Perhaps look at the ClientDataset.SavetoFile() Method

function DataSetToXml(const ADataSet : TOraQuery) : String;
var
  Provider : TDataSetProvider;
  ClientDataSet : TClientDataset;
begin
  Provider := TDataSetProvider.Create(nil);
  try
    Provider.Name := 'tmpProvider';
    Provider.DataSet := ADataSet;
    ClientDataSet := TClientDataSet.Create(nil);
    try
      ClientDataSet.Data := Provider.Data;
      Result := ClientDataSet.XMLData;
    finally
      FreeAndNil(ClientDataSet);
    end;
  finally
    FreeAndNil(Provider);
  end;
end;

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