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     Session["LoginUser"] = FormatString.Replace(txtLoginUser.Text);  //ÕâÀï¾ÍÊǸøsession¸³ÖµÁË.ÎҶԵǼÓû§½øÐÐÁËһЩ°²È«´¦Àí
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     Response.Redirect("Admin_Index.Aspx");
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     lblErr.Text = Message.Show("Óû§Ãû»òÃÜÂë´íÎó!");
     ShowValidate(); //ÖØÐÂÏÔʾÑéÖ¤Âë
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        {
                Response.Redirect("Login.Aspx"); //Èç¹ûSessionΪ¿Õ,Ôòתµ½µÇ½ҳ.
        }
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