C＃查询不更新数据库

Question

我正在尝试使用以下代码更新数据库表中的LastUpdOn列：

if (FileImgsave.HasFile == true)
{
    string imgfile = Path.GetFileName(FileImgsave.PostedFile.FileName);

    // FileImgsave.SaveAs("Images/" + imgfile);
    FileImgsave.SaveAs(Server.MapPath("~/Images/" + imgfile));

    sqlCon.Open();

    SqlCommand cmd = sqlCon.CreateCommand();
    cmd.CommandType = CommandType.Text;
    cmd.CommandText = "UPDATE Advertisement SET Item = @item, ImgPath = @image, Name = @name WHERE AdvID = '" + AdsTb.Text + "'";

    cmd.Parameters.AddWithValue("@name", nameTb.Text);
    cmd.Parameters.AddWithValue("@item", imgfile);
    cmd.Parameters.AddWithValue("@image", "~/Images/" + imgfile);

    cmd.ExecuteNonQuery();

    SqlCommand sqlCmd2 = new SqlCommand("UpdTime", sqlCon);
    sqlCmd2.CommandType = CommandType.StoredProcedure;
    sqlCmd2.ExecuteNonQuery();

    // string qry = "UPDATE AdvertisementTest SET Item='" + itemTb.Text + "' WHERE AdvertisementID='"+AdsTb.Text+"' AND ImgPath='"+ImageTb.Text+"'";

    sqlCon.Close();

    FillGridView();

    LitMsg.Text = "Update successfully!";
    Clear();
    ButSave.Enabled = true;
}

UpdTime查询在下面

ALTER PROC [dbo].[UpdTime]
AS BEGIN
    UPDATE Advertisement
    SET LastUpdOn = GETDATE()
END

我已经检查了数据库，并且LastUpdOn列尚未更新，因此仍为NULL。