Question

我正尽力使我的网络应用程序尽可能快，我正在寻找的一个选项是将代码缩减到每个页面。所以我有三个DDL，如下所述，他们做同样的工作来根据cookie值绑定DDL。所以我如何创建一个类并使用它来绑定所有DDL

-StateHPDDL

-BizstateHPFilterDDL

-filterstathpjob

page_load中每个DDL使用的代码如下所示

if (!IsPostBack)
        {
            if (cookie["Location"] == null)
            {

                DataTable filterstathpAdsDT = new DataTable();

                using (SqlConnection filterstathpAdsCon = new SqlConnection(cs))
                {

                    SqlCommand filterstathpAdsCMD = new SqlCommand("SELECT State FROM State WHERE Country = @Location", filterstathpAdsCon);

                    var Location = cookie.Value;

                    filterstathpAdsCMD.Parameters.AddWithValue("@Location", Location);


                    SqlDataAdapter filterstathpAdsAP = new SqlDataAdapter();
                    filterstathpAdsAP.SelectCommand = filterstathpAdsCMD;
                    filterstathpAdsAP.Fill(filterstathpAdsDT);

                    StateHPDDL.DataSource = filterstathpAdsDT;
                    StateHPDDL.DataTextField = "State";

                    StateHPDDL.DataBind();
                }

                StateHPDDL.Items.Insert(0, new ListItem("Select Province", ""));
            }


        }

如果您逐步解释，请让我更清楚地理解并遵循您的步骤，我将不胜感激

Answer 1

我已经轻松解决了以下问题并且工作正常

 if (!IsPostBack)
        {
            if (cookie["Location"] == null)
            {

                DataTable filterstathpBizDT = new DataTable();

                using (SqlConnection filterstathpBizCon = new SqlConnection(cs))
                {

                    SqlCommand filterstathpBizCMD = new SqlCommand("SELECT State FROM State WHERE Country = @Location", filterstathpBizCon);

                    var Location = cookie.Value;

                    filterstathpBizCMD.Parameters.AddWithValue("@Location", Location);


                    SqlDataAdapter filterstathpBizAP = new SqlDataAdapter();
                    filterstathpBizAP.SelectCommand = filterstathpBizCMD;
                    filterstathpBizAP.Fill(filterstathpBizDT);

                    BizstateHPFilterDDL.DataSource = filterstathpBizDT;
                    StateHPDDL.DataSource = filterstathpBizDT;
                    filterstathpjob.DataSource = filterstathpBizDT;

                    BizstateHPFilterDDL.DataTextField = "State";
                    StateHPDDL.DataTextField = "State";
                    filterstathpjob.DataTextField = "State";

                    BizstateHPFilterDDL.DataBind();
                    StateHPDDL.DataBind();
                    filterstathpjob.DataBind();
                }

                BizstateHPFilterDDL.Items.Insert(0, new ListItem("Select Province", ""));
                StateHPDDL.Items.Insert(0, new ListItem("Select Province", ""));
                filterstathpjob.Items.Insert(0, new ListItem("Select Province", ""));
            }


        }

使用class绑定三个级联DDL

1 个答案: