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     1.ÓÃTClientDataSet²Ù×÷XML£»TClientDataSetÊǸöºÃ¶«Î÷£¬ÓÃËü²Ù×÷XMLÊǺܼòµ¥µÄÊ£¬²»¹ýȱµãÊÇÖ»ÄܲÙ×÷¹Ì¶¨¸ñʽµÄ XML£¬ËüÊʺϲÙ×÷±í½á¹¹µÄÊý¾Ý£¬Èç¹ûÄãÐèÒª°ÑÊý¾Ý±íµ¼³ö³ÉXMLÄÇÓÃTClientDataSetÊǸöºÃÖ÷Ò⣬±ÈÈçÏÂÃæÊÇÒ»¸öÊý¾Ý¼¯µ¼³ö³ÉXMLµÄ·½ ·¨£º
procedure ExportToXML(SrcDataSet:TDataSet;const XMLFileName:String);
var tmpCds:TClientDataSet;
    i:integer;
    NewField:TFieldDef;
begin
SrcDataSet.DisableControls;
tmpCds:=TClientDataSet.Create(nil);
try
    for i:=0 to SrcDataSet.FieldCount-1 do
    begin
      NewField:=tmpCds.FieldDefs.AddFieldDef;
      NewField.Name:=SrcDataSet.Fields[i].FieldName;
      NewField.DataType:=SrcDataSet.fields[i].DataType;
      NewField.Size:=SrcDataSet.Fields[i].Size;
    end;
    tmpCds.CreateDataSet;
    if tmpCds.Active then tmpCds.LogChanges:=False;
    SrcDataSet.First;
    while not SrcDataSet.Eof do
    begin
      tmpCds.Append;
      for i:=0 to SrcDataSet.FieldCount-1 do
        tmpCds.FieldByName(SrcDataSet.Fields[i].FieldName).Value:=SrcDataSet.Fields[i].Value;
      tmpCds.Post;
      SrcDataSet.Next;
    end;
    tmpCds.SaveToFile(XMLFileName);
finally
    SrcDataSet.EnableControls;
    tmpCds.Free;
end;
end;
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Level: integer;
   
Level := GetKeyState(VK_CAPITAL);
if Level = 0 then
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KeyState : TKeyBoardState;
 
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