MS Update Panel



ASPX
<obspl:Splitter runat="server" StyleFolder="styles/default">
    <LeftPanel>
        <Content>
            <asp:Button ID="btnUpdatePanel" Text="Update Panel"
                 runat="server" OnClick="btnUpdatePanel_Click" />
        </Content>
    </LeftPanel>
    <RightPanel>
        <Content>
            <asp:UpdatePanel ID="UpdatePanel1" runat="server"
                 UpdateMode="Conditional">
                <ContentTemplate>
                    <asp:Literal ID="lText" runat="server" />
                </ContentTemplate>
            </asp:UpdatePanel>
        </Content>
    </RightPanel>
</obspl:Splitter>

C#
    void Page_Load(object sender, EventArgs e)
    {
        if (!IsCallback)
        {
            SetAsyncTrigger();
        }
    }
    
    protected void btnUpdatePanel_Click(object sender, EventArgs e)
    {
        lText.Text = "Literal updated.";
        UpdatePanel1.Update();
    }
    
    protected override void CreateChildControls()
    {
        if (IsPostBack)
        {
            SetAsyncTrigger();
        }

        base.CreateChildControls();
    }
    
    private void SetAsyncTrigger()
    {
        // Add async postback trigger
        AsyncPostBackTrigger ap = new AsyncPostBackTrigger();
        ap.ControlID = btnUpdatePanel.UniqueID;
        ap.EventName = "Click";
        UpdatePanel1.Triggers.Add(ap);
    }