使用Server获取地址
    protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write("Server.Mappath方法攻取虚拟路径所对应的物理路径！");
        Response.Write(Server.MapPath("/Response"));//Response.Write(Server.MapPath("/网站目录"));
    }
使用Server对字符串编码和解码

    protected void Button1_Click(object sender, EventArgs e)
    {
        string str = TextBox1.Text;
        Label1.Text = Server.UrlEncode(str);//Server对字符串编码

    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        string str = TextBox2.Text;
        Label2.Text = Server.UrlDecode(str);//Server对字符串解码
    }