ASP.NET单选框与多选框值获取

【多选获取值】：
<div>
    <asp:Label ID="Label1" runat="server" Text="ListBox多选"></asp:Label><br />
    <asp:ListBox ID="ListBox1" runat="server" Height="103px" Width="212px" SelectionMode="Multiple">
        <asp:ListItem>Java</asp:ListItem>
        <asp:ListItem>HTML</asp:ListItem>
        <asp:ListItem Value="Web">Web前端开发</asp:ListItem>
    </asp:ListBox>
    <br />
    <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
</div>

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public partial class Default2 : System.Web.UI.Page
{
    String i;//1.定义变量
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        foreach(ListItem lst in ListBox1.Items)//2.循环取出（ListBox1为多选控件的ID）
        {
            if (lst.Selected)
            {
                i += lst.Text;
            }
        }
        Response.Write(i);//在网页上输出i变量的内容
    }
}

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【单选获取值】：
string gender = rblxb.SelectedValue;//将列表控件id为rblxb的Value值赋给字符串变量gender

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protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
{
    String jg = RadioButtonList1.SelectedValue.ToString();
    if (jg == "wqndyd")
    {
        s1.Text = "测试";
    }
}