动态添加UpdatePannel

aspx

    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>

    </form>

cs

    protected void Page_Load(object sender, EventArgs e)
    {
        UpdatePanel up = new UpdatePanel();
        up.ID = "UpdatePanel1";
        this.Form.Controls.Add(up);

        LiteralControl lc = new LiteralControl(DateTime.Now.ToString());
        up.ContentTemplateContainer.Controls.Add(lc);

        Button btn = new Button();
        btn.Text = "Refresh";
        up.ContentTemplateContainer.Controls.Add(btn);
    }