数据库信息绑定DropDownList控件的Item

SqlConnection conn = DBLink.GetConnection();

        conn.Open();

        SqlCommand cmd = new SqlCommand("select TypeID,TypeName from ArticleType", conn);

        if (ddltype.Items.Count != 0)  //如果DropDownList里面原有项目则清空

            ddltype.Items.Clear();

        SqlDataReader sdr = cmd.ExecuteReader();

        ddltype.DataSource = sdr;

        ddltype.DataTextField = "TypeName";
//数据库包含两个字段，TypeName和TypeID

        ddltype.DataValueField = "TypeID";

        ddltype.DataBind();

        conn.Close();

        ddltype.Items.Insert(0, "请选择文章类型...");