写
dm.ClientDataSet9.Close;
dm.ClientDataSet9.CommandText:='';
dm.ClientDataSet9.CommandText:='select * from yL_XX_userinf';
dm.ClientDataSet9.Open;
dm.ClientDataSet9.First;
mystream := TMemoryStream.Create;
mystream.loadfromfile(GetCurrExeDIR+'TCKWJ_YL.exe'); //将文件加载到流里
mystream.seek(0,soFromBeginning);
dm.ClientDataSet9.Edit;
(dm.ClientDataSet9.FieldByName('newfile') as Tblobfield).LoadFromStream(mystream);
dm.ClientDataSet9.ApplyUpdates(-1);
读
UpdataNewFile:=Tblobfield.Create(application);
dm.ClientDataSet9.Close;
dm.ClientDataSet9.CommandText:='select * from Yl_xx_userinf';
dm.ClientDataSet9.Open;
updatanewfile:=Tblobfield(dm.ClientDataSet9.FieldByName('newfile'));
//if not UpdataNewFile.IsNull then
begin
stream:=TMemoryStream.create;
UpdataNewFile.savetostream(stream);
//判断文件夹是否存在 如果不存在就创建
s:= GetCurrExeDIR+'temp';
if not DirectoryExists(s) then
MkDir(s);
Tblobfield(dm.ClientDataSet9.fieldbyname('newfile')).SaveTofile(GetCurrExeDIR+'temp\TCKWJ_YL.exe.exe');
Panel1.Caption := '升级完毕!请重新启动软件';
end;
每次只能读出0字节,不知道为什莫没写进去
dm.ClientDataSet9.Close;
dm.ClientDataSet9.CommandText:='';
dm.ClientDataSet9.CommandText:='select * from yL_XX_userinf';
dm.ClientDataSet9.Open;
dm.ClientDataSet9.First;
mystream := TMemoryStream.Create;
mystream.loadfromfile(GetCurrExeDIR+'TCKWJ_YL.exe'); //将文件加载到流里
mystream.seek(0,soFromBeginning);
dm.ClientDataSet9.Edit;
(dm.ClientDataSet9.FieldByName('newfile') as Tblobfield).LoadFromStream(mystream);
dm.ClientDataSet9.ApplyUpdates(-1);
读
UpdataNewFile:=Tblobfield.Create(application);
dm.ClientDataSet9.Close;
dm.ClientDataSet9.CommandText:='select * from Yl_xx_userinf';
dm.ClientDataSet9.Open;
updatanewfile:=Tblobfield(dm.ClientDataSet9.FieldByName('newfile'));
//if not UpdataNewFile.IsNull then
begin
stream:=TMemoryStream.create;
UpdataNewFile.savetostream(stream);
//判断文件夹是否存在 如果不存在就创建
s:= GetCurrExeDIR+'temp';
if not DirectoryExists(s) then
MkDir(s);
Tblobfield(dm.ClientDataSet9.fieldbyname('newfile')).SaveTofile(GetCurrExeDIR+'temp\TCKWJ_YL.exe.exe');
Panel1.Caption := '升级完毕!请重新启动软件';
end;
每次只能读出0字节,不知道为什莫没写进去
我都是这样给客户端更新的
这样太麻烦了,我建议你升级程序单独做成aa,先下载新程序,再关了主程序bb,再拷贝。
对了,blob那个问题我也遇到过,怎么解决的?