Title: ADO Recordset XML
Question: This unit provide two functions:
function RecordsetToXML(const Recordset: _Recordset): String;
function RecordsetFromXML(const XML: String): _Recordset;
They are very usefull for export/import operations.
Answer:
unit ADOXMLUnit;
interface
uses
Classes, ADOInt;
function RecordsetToXML(const Recordset: _Recordset): String;
function RecordsetFromXML(const XML: String): _Recordset;
implementation
uses
ComObj;
{
Example:
...
Memo1.Lines.Text:=RecordsetToXML(ADOQuery1.Recordset);
...
}
function RecordsetToXML(const Recordset: _Recordset): String;
var RS: Variant;
Stream: TStringStream;
begin
Result:='';
if Recordset=nil then Exit;
Stream:=TStringStream.Create('');
try
RS:=CreateOleObject('ADODB.Recordset');
RS:=Recordset;
RS.Save(TStreamAdapter.Create(stream) as IUnknown, adPersistXML);
Stream.Position:=0;
Result:=Stream.DataString;
finally
Stream.Free;
end;
end;
{
Example:
...
ADOQuery1.Recordset:=RecordsetFromXML(Memo1.Lines.Text);
...
}
function RecordsetFromXML(const XML: String): _Recordset;
var RS: Variant;
Stream: TStringStream;
begin
Result:=nil;
if XML='' then Exit;
try
Stream:=TStringStream.Create(XML);
Stream.Position:=0;
RS:=CreateOleObject('ADODB.Recordset');
RS.Open(TStreamAdapter.Create(Stream) as IUnknown);
Result:=IUnknown(RS) as _Recordset;
finally
Stream.Free;
end;
end;
end.