delphi DBGrid导出Excel

uses ComObj;

//DBGrid:指定的DBGrid;SaveFileName:要保存的文件名

function ExportDBGrid(DBGrid: TDBGrid; SaveFileName: string): boolean;
var
c,r,i,j: integer;
app: Olevariant;
TempFileName, ResultFileName: string;
begin
try
result := True;
app := CreateOLEObject('Excel.application');
//app.WorkBooks.Add(xlWBatWorkSheet);
except
Application.MessageBox('Excel没有正确安装！','警告',MB_OK);
result := False;
exit;
end;

SaveDialog1.DefaultExt := 'xls';
SaveDialog1.FileName:=SaveFileName;

if SaveDialog1.Execute then
TempFileName := SaveDialog1.FileName
else
Exit;

app.Workbooks.add;
app.Visible := false;
Screen.Cursor := crHourGlass;

DBGrid1.DataSource.DataSet.First;
c:=DBGrid1.DataSource.DataSet.FieldCount;
r:=DBGrid1.DataSource.DataSet.RecordCount;

Application.ProcessMessages;

for i:=0 to c-1 do
begin
app.ActiveSheet.Columns[i+1].ColumnWidth:=15;//设置格宽度
app.cells(1,1+i):=DBGrid1.DataSource.DataSet.Fields[i].DisplayLabel;
end;

for j := 1 to r do
begin
for i := 0 to c - 1 do
begin
app.cells[j+1,1].numberformatlocal:='@';//设置成文本
app.cells(j+1,1+i):=DBGrid1.DataSource.DataSet.Fields[i].AsString;
end;
DBGrid.DataSource.DataSet.Next;
end;

ResultFileName := TempFileName;

if ResultFileName = '' then
ResultFileName := '数据导出';

if FileExists(TempFileName) then
DeleteFile(TempFileName);

app.Activeworkbook.saveas(TempFileName);
app.Activeworkbook.close(false);
app.quit;
app := unassigned;

end;

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