I am working on a web application (IIS) targeting .NET 4.0 using Visual Studio 2015.
I have an .aspx that contains 4 usercontrols (.ascx). When one of the usercontrols posts back the main .aspx AND the other three usercontrols also do a postback.
I'm looking for a way to prevent the other usercontrols from doing a postback when one of them does.
I've tried putting each of the usercontrols within an updatepanel (code below). I've tried putting an updatepanel within each usercontrol. I've tried changing the ChildrenAsTriggers and UpdateMode properties. I've tried creating a Click event in each usercontrol that's raised when the items within the usercontrol post back (example on just one of the usercontrols below).
No matter what, the page and all four usercontrols all do a postback every time one of them does.
Main .ASPX:
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<%# Register TagPrefix="uc1" TagName="Components" Src="Components.ascx" %>
<%# Register TagPrefix="uc2" TagName="Options" Src="Options.ascx" %>
<%# Register TagPrefix="uc3" TagName="Settings" Src="Settings.ascx" %>
<%# Register TagPrefix="uc4" TagName="Menu" Src="Menu.ascx" %>
<form id="form1" runat="server">
<cc1:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" EnablePartialRendering="true"></cc1:ToolkitScriptManager>
<asp:Panel ID="pnlComponents" runat="server">
<asp:UpdatePanel ID="updpnlComponents" runat="server">
<ContentTemplate>
<uc1:Components id="Components" runat="server"></uc1:Components>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
<asp:Panel ID="pnlOptions" runat="server">
<asp:UpdatePanel ID="updpnlOptions" runat="server">
<ContentTemplate>
<uc2:Options id="Options" runat="server" CssClass="jQTrackChanges"></uc2:Options>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
<asp:Panel ID="pnlSettings" runat="server">
<asp:UpdatePanel ID="updpnlSettings" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Settings" EventName="Click" />
</Triggers>
<ContentTemplate>
<uc3:Settings id="Settings" runat="server" CssClass="jQTrackChanges"></uc3:Settings>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
<asp:Panel ID="pnlMenu" runat="server">
<asp:UpdatePanel ID="updpnlMenu" runat="server">
<ContentTemplate>
<uc4:Menu id="Menu" runat="server" CssClass="jQTrackChanges"></uc4:Menu>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
</form>
Settings.ascx.vb:
Private Sub chkIn_CheckedChanged(sender As Object, e As EventArgs) Handles chkIn.CheckedChanged
RaiseEvent Click(Me, e)
End Sub
Private Sub chkOut_CheckedChanged(sender As Object, e As EventArgs) Handles chkOut.CheckedChanged
RaiseEvent Click(Me, e)
End Sub
Public Event Click As EventHandler
Edit - adding AutoPostBack=false and UpdateMode=Conditional has no effect. All four usercontrols still post back when one does.
Updated main .ASPX:
<asp:Panel ID="pnlOptions" runat="server" AutoPostBack="false">
<asp:UpdatePanel ID="updpnlOptions" runat="server" UpdateMode="Conditional" AutoPostBack="false">
<ContentTemplate>
<uc2:Options id="Options" runat="server" AutoPostBack="false" CssClass="jQTrackChanges"></uc2:Options>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
<asp:Panel ID="pnlSettings" runat="server" AutoPostBack="false">
<asp:UpdatePanel ID="updpnlSettings" runat="server" UpdateMode="Conditional" AutoPostBack="false">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Settings" EventName="Click" />
</Triggers>
<ContentTemplate>
<uc3:Settings id="Settings" runat="server" AutoPostBack="false" CssClass="jQTrackChanges"></uc3:Settings>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
<asp:Panel ID="pnlMenu" runat="server" AutoPostBack="false">
<asp:UpdatePanel ID="updpnlMenu" runat="server" UpdateMode="Conditional" AutoPostBack="false">
<ContentTemplate>
<uc4:Menu id="Menu" runat="server" AutoPostBack="false" CssClass="jQTrackChanges"></uc4:Menu>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
Please use autopostback property from properties window.change it's default behavior true or false and try again.
We eventually gave up and used Javascript to replace as much of the postback activity as possible to minimize the number of postbacks that happen.
Related
I am fetching data from DB and assign it to repeater.
When I click on button event it only goes to page load function but not to the required on-click event.
I am confused as to why this is happening.
And when I comment out repeater its working fine. I don't why it's not working with repeater in page load.
Aspx code:
<form runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel runat="server" pdateMode="Conditional" ChildrenAsTriggers="true" >
<asp:Button ID="Button2" runat="server" Text="Next Availabilities"
OnClick="Button2_Click" />
<asp:Repeater id="repeater1" runat="server">
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text=""><%# Eval("Time") %></asp:Label>
</ItemTemplate>
</asp:Repeater>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID ="Button3" EventName ="Click" />
<asp:AsyncPostBackTrigger ControlID ="Button2" EventName ="Click" />
</Triggers>
</asp:UpdatePanel>
</form>
In your UpdatePanel:
Correct pdateMode to UpdateMode
Remove ChildrenAsTriggers="true"
Add starting tag of <ContentTemplate>
Assign id ID="UpdatePanel1"
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
I have 2 user control. 1 User control inside other user control
User Control 2
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="Uc2.ascx.cs" Inherits="Wrapsons.WebApp.UserControls.UcSeason" %>
<asp:Button ID="BtnTest" runat="server" OnClick="BtnTest_OnClick" Text="Test"/>
User Control 1
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="Uc1.ascx.cs" Inherits="Wrapsons.WebApp.UserControls.UcSeason" %>
<asp:UpdatePanel runat="server">
<ContentTemplate>
<telerik:RadWindow ID="RadWindow" runat="server">
<ContentTemplate>
<uc1:Uc2 ID="Uc2" runat="server" />
</ContentTemplate>
</telerik:RadWindow>
</ContentTemplate>
</asp:UpdatePanel>
In Test.aspx Uc1 is used
When I click on Test Button, RadWindow is closed.
Is there any way to avoid the postback?
Thank you in advance!
Here is how to use AJAX properly with the ContentTemplate: http://www.telerik.com/help/aspnet-ajax/window-ajaxifying.html
and here is your snippet, modified:
<telerik:RadWindow ID="RadWindow" runat="server">
<ContentTemplate>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<uc1:uc2 id="Uc2" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
</ContentTemplate>
</telerik:RadWindow>
Also, go through this one if you need to open/close the window from your server code: http://www.telerik.com/help/aspnet-ajax/window-troubleshooting-opening-from-server.html
I want to trigger my updatepanel change when I click on a HyperLink But I get an error saying:
Control with ID 'X' being registered through RegisterAsyncPostBackControl or RegisterPostBackControl must implement either INamingContainer, IPostBackDataHandler, or IPostBackEventHandler.
If I use ASP Button, then everything works correctly
My code:
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel runat="server" id="UpdatePanel" updatemode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger controlid="UpdateButton2" eventname="Click" />
</Triggers>
<ContentTemplate>
<asp:Repeater ID="rptDossiers" runat="server">
<ItemTemplate>
...
</ItemTemplate>
</asp:Repeater>
<asp:HyperLink NavigateUrl="#" runat="server" id="UpdateButton2" onclick="tousLesDossiers_Click">
Tous les Dossiers
</asp:HyperLink>
<%--<asp:Button runat="server" id="UpdateButton2" onclick="tousLesDossiers_Click" text="Update" />--%>
</ContentTemplate>
</asp:UpdatePanel>
Any suggestions?
Thanks
There is no Click event handler that is tied to the Hyperlink control, you have to use LinkButton Instead
I'm trying to use some AJAX and ASP.Net together to enable me to run functions without having to refresh the whole page but i've stumbled across a problem in doing this
Here's my code
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:DropDownList ID="ddl1" runat="server" OnSelectedIndexChanged="update1" />
<asp:TextBox runat="server" ID="txt1" />
</ContentTemplate>
</asp:UpdatePanel>
And here's my code behind
Sub update1(ByVal sender As Object, ByVal e As EventArgs)
txt1.Text = Now.ToString
End Sub
The event doesn't fire because I don't have AutoPostBack="True" on my ddl but adding that to the ddl will postback the whole page.
Is there a way to avoid using AutoPostBack="True" so that it only updates the panel?
I know I can use an asp:Button to get around this but i'd really like to be able to use a ddl with OnSelectedIndexChanged
Thanks
If you want to avoid to send the whole viewstate to the server, you should look at callbacks.
Instead, if you want to avoid a refresh of the entire page, but with postback, this should work:
<asp:DropDownList ID="ddl1" runat="server" OnSelectedIndexChanged="update1" AutoPostBack="True" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<Triggers>
<asp:AsyncPostbackTrigger ControlID="ddl1" EventName="SelectedIndexChanged" />
</Triggers>
<ContentTemplate>
<asp:TextBox runat="server" ID="txt1" />
</ContentTemplate>
</asp:UpdatePanel>
Try creating a new page with same codes and different page name. Worked for me
I have two ASP.NET AJAX UpdatePanels .
there are two timers with diffrent intervals.
is it possible to update two updatepanels simultaneously together ?
like multi thread application .
each should be UpdatePanel Update in separate thread in one time.
i wrote this code but second timer does not work :
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<h2>
Welcome to ASP.NET!
</h2>
<p>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
</p>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<ContentTemplate>
<asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
<asp:Timer ID="Timer1" runat="server" Interval="2000">
</asp:Timer>
<asp:Timer ID="Timer2" runat="server" Interval="2000">
</asp:Timer>
</asp:Content>
Behind Code :
Protected Sub Timer1_Tick(sender As Object, e As System.EventArgs) Handles Timer1.Tick
Label1.Text = Date.Now
End Sub
Protected Sub Timer2_Tick(sender As Object, e As System.EventArgs) Handles Timer2.Tick
Label2.Text = Date.Now
End Sub
Actually, your UpdatePanels are useless in this example, because your Timers are outside of them. As a result, every time your event gets triggered, it does a full page refresh. (This is in part why you never see the second Timer get hit -- by the time the first timer gets hit, the entire page gets refreshed, so the counter resets on the first timer)
So, you need to accomplish two things to fix your page:
Get the UpdatePanels to work properly with the Timers so that only asynchronous postbacks are occurring.
Make sure that each Timer only causes one UpdatePanel to refresh.
The first can be taken care of by either moving the Timer into the UpdatePanel, as a child, or by using the <asp:Triggers> element to basically say "The only thing that will update my UpdatePanel is this timer."
The second can be taken care of by setting the UpdateMode=Conditional attribute on each UpdatePanel.
Try this:
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<h2>
Welcome to ASP.NET!
</h2>
<p>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
</p>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="false" UpdateMode="Conditional">
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Timer1" />
</Triggers>
</asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel2" runat="server" ChildrenAsTriggers="false" UpdateMode="Conditional">
<ContentTemplate>
<asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Timer2" />
</Triggers>
</asp:UpdatePanel>
<asp:Timer ID="Timer1" runat="server" Interval="2000" ontick="Timer1_Tick">
</asp:Timer>
<asp:Timer ID="Timer2" runat="server" Interval="2000" ontick="Timer2_Tick">
</asp:Timer>
</asp:Content>
I have to run to work now, so bear with me if you have any questions ;-)