我有一个下拉菜单,它包含所有国家的名称。代码工作正常,但我需要在下拉菜单中添加默认选项。如何添加默认选项?(< - 选择 - >) 。 我的代码是下拉菜单添加默认名称
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="ddlCountryofOrgin.ascx.cs" Inherits="UserControls_DataType_ddlCountryofOrgin" %>
<asp:DropDownList ID="ddlCountry" CssClass="ddlCountry" runat="server" DataValueField="english_name"
DataSourceID="sqlCountry" OnPreRender="ddlCountry_PreRender" OnSelectedIndexChanged="ddlCountry_SelectedIndexChanged" />
<asp:SqlDataSource ID="sqlCountry" runat="server" SelectCommand="SELECT [country_id],[english_name], danish_name FROM [dbo].[nano_country] WHERE [is_active] = 1 ORDER BY [sort_order] DESC, [english_name] ASC" />
预先感谢帮助...