protected void btnUpdate_Click(object sender, EventArgs e)
        {
            int    ShowId      = int.Parse(Request.QueryString["ShowId"]);
            string name        = txtName.Text;
            string URL         = txtURL.Text;
            string description = txtDesc.Text;
            string price       = txtPrice.Text;

            string response = ShowController.CheckUpdateShow(ShowId, name, URL, description, price);

            if (response == "")
            {
                ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertMessage", "alert('Update Success')", true);
                Response.Redirect("../Home/HomePage.aspx");
                return;
            }
            else
            {
                lblError.Text = response;
            }
        }