C# 如何将数据库字段绑定到下拉列表？

我正在通过一个DAL文件从数据库中请求数据。我想绑定数据并显示一个下拉菜单的单个选项，该选项与数据库的选项相对应。我该怎么做

这是我的密码：

Pages pg = new Pages();
public static string pgId;

protected void Page_Load(object sender, EventArgs e)
    {
        if(!IsPostBack)
        {
            Bind_ddlParentPage();
            Bind_ddlPageModel();
            Bind_ddlArticleModel();
            if (!IsPostBack)
        {
            pgId = Request.QueryString["pageId"];
            if (pgId != null)
            {
                GetData();
            }
        }

         }
   }
public void GetData()
{
        ddlParentPage.SelectedValue = pg.ParentPage;
        //Bind_ddlParentPage();---dropdownlist which is causing problem.
        //I want to set this data:: pg.ParentPage to dropdownlist in another 
         page
        ddlPageModel.SelectedValue = pg.PageModel;
        //Bind_ddlPageModel();
        //All the three drop downs have same table for the source, 
        'Pages' table and this page is the same page for adding new entry to 
        Pages table.

        ddlArticleModel.SelectedValue = pg.ArticleModel;
        //Bind_ddlArticleModel();

}

---

首先，您的条件语句中有一个重复项：

if(!IsPostBack) {
...
    if(!IsPostBack) {
    ...
    }
  }

其次，需要将数据绑定到下拉列表，然后设置所选值。参考：

protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            DropDownList1.DataBind(); // get the data into the list you can set it
            DropDownList1.Items.FindByValue("SOMECREDITPROBLEMS").Selected = true;
        }
    }