DropDownList 绑定

绑定

            OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0 ;Data Source=" + Server.MapPath(".\\App_Data\\mydatabase.mdb"));

            string Sql = "SELECT * FROM Class ORDER BY Taxis,Id DESC";

            OleDbDataAdapter cmd = new OleDbDataAdapter(Sql, conn);



            DataSet ds = new DataSet();

            cmd.Fill(ds,"Class");

            this.DropDownList1.DataSource = ds.Tables["Class"].DefaultView;



            DropDownList1.DataTextField = "Name";//绑定显示名称的字段

            DropDownList1.DataValueField = "Id";//绑定值的字段

            DropDownList1.DataBind();

添加

for (int i = 1; i <=3; i++)

{

    LIstItem li = new ListItem("文字" + i, "值" + i); //ListItem 代表列表的一项

    DropDownList.Items.Add(li); //Items属性维护了列表的项集合

}

获取选择项的Text,使用DropDownList.SelectedItem.Text

获取选择项的Value,使用DropDownList.SelectedItem.Value

                    或者 DropDownList.SelectedValue