Question

LINQ怎样绑定DropDownList，该如何解决

Answer 1

使用事件 如：
<div>
<asp:DropDownList ID="DropDownList1" runat="server">
</asp:DropDownList>
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
</div>
//onclick="Button1_Click" 就绑定了后台的方法
protected void Button1_Click(object sender, EventArgs e)
{
//跳转到其他页面
Response.Redirect("Index.aspx");
//给dropdownlist绑定数据
Citys dal=new Citys():
DataSet ds=dal.getAllCitys();
this.DropDownList1.DataSource=ds;
this.DropDownList1.DataTextField="cityname";
this.DropDownList1.DataValueField="cityid";
this.DropDownList1.DataBind();
}