AsyncPostBackTrigger Just flashing/flicking the UpdatePanel but not updating it
- by Pankaj
I am trying UpdatePanel & AsyncPostBackTrigger on master pages through find control method but problem is when I click on button (UpdateButton) It just flash/flick (No Postback) the UpdatePanle but still it don't update or refresh the gridview (images) inside the updatePanel.
I have placed script Manger on the master page & an AJAX Update panel in a ContentPlaceHolder in the child page. Also, in another ContentPlaceholder there is an asp button (outside of the UpdatePanel).
I want to refresh/reload the AJAX UpdatePanel with this asp button.
Thanks for suggestions.
Child Page Code :-
protected void Page_Load(object sender, EventArgs e)
{
ScriptManager ScriptManager1 = (ScriptManager)Master.FindControl("ScriptManager1");
ContentPlaceHolder cph = (ContentPlaceHolder)Master.FindControl("cp_Button");
Button btnRefresh = (Button)cph.FindControl("btnRefresh");
ScriptManager1.RegisterAsyncPostBackControl(btnRefresh);
}
protected void btnRefresh_Click(object sender, EventArgs e)
{
UpdatePanel1.Update();
}
<%@ Page Title="" Language="C#" MasterPageFile="~/InnerMaster.master" AutoEventWireup="true" CodeFile="A.aspx.cs" Inherits="A" Async="true" %>
<asp:Content ID="Content3" ContentPlaceHolderID="MainContent" Runat="Server">
<asp:UpdatePanel ID="UpdatePanel1" UpdateMode="Conditional" runat="server">
<ContentTemplate>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="id" DataSourceID="SqlDataSource1">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:Image ID="img12" runat="server" Width="650px" Height="600" ToolTip="A" ImageUrl='<%# Page.ResolveUrl(string.Format("~/Cli/{0}", Eval("image"))) %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Content>
<asp:Content ID="Content4" ContentPlaceHolderID="cp_Button" Runat="Server">
<asp:Button ID ="btnRefresh" runat="server" onclick="btnRefresh_Click" Height="34" Width="110" Text="More Images" />
</asp:Content>
Hi updated code :- Now on click event whole pages is refreshed.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
namespace EProxy
{
public class EventProxy : Control, IPostBackEventHandler
{
public EventProxy()
{ }
public void RaisePostBackEvent(string eventArgument)
{ }
public event EventHandler<EventArgs> EventProxied;
protected virtual void OnEventProxy(EventArgs e)
{
if (this.EventProxied != null)
{
this.EventProxied(this, e);
}
}
public void ProxyEvent(EventArgs e)
{
OnEventProxy(e);
}
}
}
On Master Page Code (btn click):-
protected void btnRefresh_Click(object sender, EventArgs e)
{
ContentPlaceHolder cph = (ContentPlaceHolder)this.FindControl("MainContent");
EventProxy eventProxy = (EventProxy)cph.FindControl("ProxyControl") as EventProxy;
eventProxy.ProxyEvent(e);
}
Web Config :-
<pages maintainScrollPositionOnPostBack="true" enableViewStateMac="true">
<controls>
<add tagPrefix="it" namespace="EProxy" assembly="App_Code"/>
</controls>
</pages>
