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delphi DataSnap³²×´Ö÷´Ó±íʵÏÖ

·þÎñ¶Ë£ºÌí¼ÓADOConnection£¬ADOQuery1£¬ADOQuery2¡£ÉèÖÃADOQuery1ΪÖ÷±í£¬ADOQuery2Ϊ´Ó±í¡£(ͨ¹ý  ADOQuery2.SQL.Text:= 'select * from ´Ó±í where FKID=:Ö÷±íPKID'ÉèÖÃ)¡£Ìí¼ÓDataSetProvider1ºÍDataSetProvider2·Ö±ðÁ¬½Óµ½ADOQuery1ºÍADOQuery2¡£
¿Í»§¶Ë£ºÌí¼ÓClientDataSet1£¬ClientDataSet2¡£ClientDataSet1Á¬½Óµ½DataSetProvider1¡£Ë«»÷ClientDataSet1£¬ÓÒ¼üAdd All Field¡£¿ÉÒÔ¿´µ½Ò»¸öTDataSetField×ֶΡ£ÉèÖÃClientDataSet2µÄDataSetFieldÊôÐÔΪClientDataSet1ÖеÄTDataSetFieldÁС£Ìí¼ÓDataCourse1¡¢DataSource2·Ö±ðÁ¬½Óµ½ClientDataSet1ºÍClientDataSet2¿Ø¼þ¡£Ìí¼ÓDBGrid1ºÍDBGrid2·Ö±ðÁ¬½Óµ½DataCourse1¡¢DataSource2¡£ÉèÖÃClientDataSet1.Active:= True;Õâʱ·¢ÏÖClientDataSet2Ò²×Ô¶¯´ò¿ª¡£
×ÔÔöÁд¦Àí:¼ÙÈçÖ÷´Ó±íµÄÖ÷Íâ¼ü¶¼ÊÇ×ÔÔöÁУ¬Õâʱ¿ÉÒÔÔÚ·þÎñ¶Ë´¦ÀíÖ÷´Ó±í¹ØÁª¡£ÔÚDataSetProvider1ÖеÄBeforeUpdateRecordʼþÖÐÌí¼ÓÈçÏ´úÂ룺
procedure TForm1.DataSetProvider1BeforeUpdateRecord(Sender: TObject;
  SourceDS: TDataSet; DeltaDS: TCustomClientDataSet;
  UpdateKind: TUpdateKind; var Applied: Boolean);
begin
  if ((UpdateKind = ukInsert) and
  (SourceDS = ADOQuery2)
   {and (DeltaDS.FieldByName('PKID').Value =  Unassigned)}) then
  begin
    if DeltaDS.BOF then
    begin
      qryIdentity.Close;  //qryIdentity.Sql.Text:= 'select @@identity';»ñÈ¡Ö÷±í×ÔÔöÁеÄ×îÐÂÖµ
      qryIdentity.Open;
    end;
    DeltaDS.FieldByName('PKID').NewValue := qryIdentity.Fields[0].Value;//¸³¸ø×Ó±íµÄµ±Ç°ÐÐ
  end;
end;
this over.


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it's work in Delphi 7
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interface
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  Windows, ActiveX, ComObj;
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ÔÚdelphi 2010 Éϰ²×° RemObjects 6.0.39.777

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