下拉列表框(dropdownlist)的几种绑定数据的方法

文章描述:-2022年2月18日发(作者:initialize error)未绑定状态 绑定方法1 单击“确定”完成列表项的添加 看到代码如下:

-

下拉列表框(dropdownlist)的几种绑定数据的方法 2022年2月18日发(作者:initialize error)


未绑定状态

绑定方法1

单击“确定”完成列表项的添加
看到代码如下:
<%@ Page Language=
CodeFile=
http:
练习1<title> <br><head> </p><p><br><body> <br> <form id=<br> <div> <br>   <br> <asp:Button ID=确定<br>OnClick=<br> <asp:DropDownList ID=<br> <asp:ListItem>a<asp:ListItem> <br> <asp:ListItem>b<asp:ListItem> <br> <asp:ListItem>c<asp:ListItem> <br> <asp:ListItem>d<asp:ListItem> <br> <asp:ListItem>e<asp:ListItem> <br> <asp:DropDownList><br > <br> <br > <br> <div> <br> <form> <br><body> <br><html> <br>运行看到: <br> <br>绑定方法2:用Dropdownlist1的items集合的Add方法添加项数据 <br>在确定按钮的单击事件中添加如下代码: <br>protected void Button1_Click(object sender, EventArgs e) <br> { <br> (new ListItem(<br> (new ListItem(<br> (new ListItem(<br> (new ListItem(<br> (new ListItem(<br> } <br>这样中的代码如下: <br>using System; <br>using ; <br>using uration; <br>using ; </p><p><br>using ty; <br>using ; <br>using trols; <br>using ts; <br>using ntrols; <br>public partial class _Default : <br>{ <br> protected void Page_Load(object sender, EventArgs e) <br> { <br> } <br> protected void Button1_Click(object sender, EventArgs e) <br> { <br> (new ListItem(<br> (new ListItem(<br> (new ListItem(<br> (new ListItem(<br> (new ListItem(<br> } <br>} <br>运行并单击“确定”按钮后,发现列表框中多了11,22,33,44,55: <br> <br>绑定方法3:先引入命名空间using ti;后定义一个动态数组:<br>arraylist su=new arraylist(); <br>接着用(给数组添加数据,最后用<br>urce=su;nd();把数组<br>数据绑定到下拉列表框中 <br>代码变成如下: <br>using System; <br>using ; </p></div><p><h2>-</h2></p><div><img src="/uploads/image/0939.jpg" alt="下拉列表框(dropdownlist)的几种绑定数据的方法 "/></img></div></br> </div> <div class="statement yc">发布时间:2022-02-18 20:52:12</div> <div class="statement yc">文章版权声明:除非注明,否则均为<span class="red">IT技术网-学习WEB前端开发等IT技术的网络平台</span>原创文章,转载或复制请以超链接形式并注明出处。</div> </article> </div> <ul class="single-nav"> <li class="entry-page-prev"><a href="https://www.173it.cn/wangluojishu/4.html" title="Android实现图片滚动控件">上一篇</a></li> <li class="entry-page-next"><a href="https://www.173it.cn/wangluojishu/6.html" title="HTML5 CSS3网页设计与制作教学导航">下一篇</a></li> </ul> <div class="part-mor box-show wow fadeInDown"> <!--相关文章--> <h3 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