protected void Btnlogin_Click(object sender, EventArgs e)
{
BLL.Bll Bll = new BLL.Bll();
String Result = Bll.Login(TBNomelog.Text, TBPasslog.Text);
String UserID = Bll.UserID(TBNomelog.Text);
Session ["IDutil"] = UserID;
Response.Write(Session["IDultil"].ToString());
if (Result.Equals("True"))
{
MultiView1.ActiveViewIndex = 2;
}
else
{
MultiView1.ActiveViewIndex = 1;
}
}
}
当我执行 Response.Write 时,我收到“NullReferenceException 未被用户代码处理”,为什么会发生这种情况?