扩展Html.DropDownList出现的问题？？

Question

mvc扩展方法DropDownList枚举boolean

Answer 1

设置DropDownList实现商品是否销售
  protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        int ID=int.Parse(GridView1.DataKeys[e.RowIndex].Value.ToString());
        bool PaperState = bool.Parse(((DropDownList)GridView1.Rows[e.RowIndex].FindControl("ddlSellState")).SelectedValue);
        string strsql = "UPDATE tb_OrderForm SET 是否停售 = @SellState WHERE 产品编号= @ID";
        SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionString"]);
        conn.Open();
        SqlCommand comm = new SqlCommand(strsql, conn);
        comm.Parameters.Add(new SqlParameter("@ID", SqlDbType.Int, 4));
        comm.Parameters["@ID"].Value = ID;
        comm.Parameters.Add(new SqlParameter("@SellState", SqlDbType.Bit, 1));
        comm.Parameters["@SellState"].Value = PaperState;
        if (Convert.ToInt32(comm.ExecuteNonQuery()) > 0)
        {
            Response.Write("<script language=javascript>alert('设置成功!');location='Default.aspx'</script>");
        }
        else
        {
            Response.Write("<script language=javascript>alert('设置失败!');location='Default.aspx'</script>");
        }
        //取消编辑操作
        GridView1.EditIndex = -1;
        //调用自定义方法DbBind()重新绑定GridView控件中信息
        DbBind();
    }