📄 bindingexpressionsormethods.aspx
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<html>
<head>
<script language="C#" runat="server">
void Page_Load(Object Sender, EventArgs E) {
if (!Page.IsPostBack) {
//创建ArrayList对象
ArrayList myList = new ArrayList();
//为ArrayList对象添加选项
myList.Add ("上海");
myList.Add ("北京");
myList.Add ("广州");
//将ArrayList对象绑定于DropDownList控件
ddlCity.DataSource = myList;
ddlCity.DataBind();
}
}
//处理用户选择的选项
String getResult(String city) {
return "welcome to " +city;
}
void SubmitBtn_Click(Object sender, EventArgs e) {
Page.DataBind();
}
</script>
</head>
<body>
<h3>绑定表达式和函数返回值</h3>
<form runat=server>
<asp:DropDownList id="ddlCity" runat="server" />
<asp:button Text="提交" OnClick="SubmitBtn_Click" runat=server/><p>
<asp:Label id="lbmyCity" text='<%#getResult(ddlCity.SelectedItem.Text)%>' runat="server" />
</form>
</body>
</html>
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