delphi 中StringList中遇到的坑

代码如下：

const   cSql = 'select * from [%s$]';var FileName : string;    flag : Boolean;    _TableList,AData: TStringList;    _TableName,str1 : string;    arr1 : array of string;    _Index,k,i : Integer;begin  dlgOpen1.Create(nil);  //指定默认打开路径  dlgOpen1.InitialDir:='C:\Users\Administrator\桌面';  dlgOpen1.Filter:='Excel文件|*.xls';  flag:=dlgOpen1.Execute;    if not flag then    begin      dlgOpen1.Free;    end;  FileName:=dlgOpen1.FileName;  conn := TADOConnection.Create(nil);  conn.ConnectionString := 'Provider=Microsoft.Jet.OLEDB.4.0;Data Source='+FileName+';Extended Properties=excel 8.0;Persist Security Info=False';  conn.LoginPrompt := False;  conn.Connected := True;  _TableList := TStringList.Create;  conn.GetTableNames(_TableList);  //SetLength(arr1,9);  AData := TStringList.Create;  if _TableList.Count > 0 then  begin    _TableName := StringReplace(_TableList.Strings[0], '$', '', [rfReplaceAll]); //+'$'    qry1.Connection := conn;    qry1.Close;    qry1.sql.Text := Format(cSql,[_TableName]);    qry1.Open;    DSXLS.DataSet := qry1;    //GridXLS.Datasource :=DSXLS;  end;  k := 0;i := 0;  if qry1.RecordCount>0 then  begin    while not qry1.Eof do    begin      AData.Add(qry1.Fields[0].AsString);      str1 := AData.Strings[0];      AData.Add(qry1.Fields[1].AsString);      AData.Add(qry1.Fields[2].AsString);      AData.Add(qry1.Fields[3].AsString);      AData.Add(qry1.Fields[4].AsString);      AData.Add(qry1.Fields[5].AsString);      AData.Add(qry1.Fields[6].AsString);      AData.Add(qry1.Fields[7].AsString);      AData.Add(qry1.Fields[8].AsString);//      arr1[0] := qry1.Fields[0].Value;//      arr1[1] := qry1.Fields[1].Value;//      arr1[2] := qry1.Fields[2].Value;//      arr1[3] := qry1.Fields[3].Value;//      arr1[4] := qry1.Fields[4].Value;//      arr1[5] := qry1.Fields[5].Value;//      arr1[6] := qry1.Fields[6].Value;//      arr1[7] := qry1.Fields[7].Value;//      arr1[8] := qry1.Fields[8].Value;      if (AData.Strings[0]<>'合计1')and(AData.Strings[0]<>'总计2')and(AData.Strings[0]<>'总计3') then      begin        _Index := cxgrdtblvw1.DataController.AppendRecord;        cxgrdtblvw1.DataController.Values[_Index,0] := AData.Strings[0];        cxgrdtblvw1.DataController.Values[_Index,1] := AData.Strings[1];        cxgrdtblvw1.DataController.Values[_Index,2] := AData.Strings[2];        cxgrdtblvw1.DataController.Values[_Index,3] := AData.Strings[3];        cxgrdtblvw1.DataController.Values[_Index,4] := AData.Strings[4];        cxgrdtblvw1.DataController.Values[_Index,5] := AData.Strings[5];        cxgrdtblvw1.DataController.Values[_Index,6] := AData.Strings[6];        cxgrdtblvw1.DataController.Values[_Index,7] := AData.Strings[7];        cxgrdtblvw1.DataController.Values[_Index,8] := AData.Strings[8];        AData.Clear;        k := k+1;        Application.ProcessMessages;        cxgrdtblvw1.DataController.Post;      end      else      begin        if Trim(str1)='合计1' then        ShowMessage('1');      end;      qry1.Next;    end;  cxgrdtblvw1.DataController.Post;  showMessage(inttostr(k));  end;end;

这是一段通过ADO加载Execl在cxGrid显示的代码。其中第一行是‘合计1’‘总计2’‘总计3’的数据不导入，而我这段代码的问题在于我依旧在cxGrid中看到导出结果有‘合计1’‘总计2’‘总计3’的数据，打了断点也看到值一样没有差错。

最后想到了原来是StringList中的String是有空格的。所以debug的时候’合计1’<>’合计1’的结果是true，实际上是’合计1 ‘<>’合计1’.