Ajax error: Accordian

Hi,

I placed a textbox and a button in an Accordian (inside a pane). When i clicked the button and sumbit the form the data in the textbox is gone. It happens only in the first post back. After that there is no issue.

Can someone kindly let me know if it is an issue or am I doing something wrong ? Do I have do some special configuration in the According control to be used effectively ?

Thanks

Rukshan

hi,

could you post .aspx and code behind code please.

thanks,

satish.

Hi Satish,

I had done a mistake in my post ealier. The problem occurs when you put the textbox and the button in a user control and place that user control inside an accordian pane.

Here is the code,

file : testusercontrol.ascx

<%@. Control Language="C#" AutoEventWireup="true" CodeFile="testusercontrol.ascx.cs" Inherits="testusercontrol" %>
<asp:TextBox runat="server" ID="TextBox1" />
<asp:Button runat="server" ID="submit1" Text="submit" />
<asp:Label runat="server" ID="label" ></asp:Label>

file: testusercontrol.ascx.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class testusercontrol : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{

submit1.Click += new EventHandler(sub_Click);

}

void sub_Click(object sender, EventArgs e)
{
label.Text = TextBox1.Text;
}
}

Here is the page where I have put the above usercontrol (there is no important code in the code behind for the page, so I am not going to put that here )

file: testatlas.aspx

<%@. Page Language="C#" AutoEventWireup="true" CodeFile="testatlas.aspx.cs" Inherits="testatlas" %
<%@. Register src="http://pics.10026.com/?src=testusercontrol.ascx" TagName="testusercontrol" TagPrefix="uc1" %
<%@. Register Assembly="Microsoft.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
Namespace="Microsoft.Web.UI" TagPrefix="asp" %
<%@. Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:scriptmanager ID="Scriptmanager1" runat="server"></asp:scriptmanager>

<div>
<cc1:Accordion ID="Accordion1" runat="server" SelectedIndex="0" Width="100%" Height="100%"

>
<Panes>
<cc1:AccordionPane ID="pane1" runat="server">
<Header>pane1</Header>
<Content>
<uc1:testusercontrol id="Testusercontrol1" runat="server">
</uc1:testusercontrol>
</Content>
</cc1:AccordionPane>

</Panes>
</cc1:Accordion>

</div>
</form>
</body>
</html>

The issue is when you enter some text on the textbox (which is in the usercontrol) and submit, the label should be populated with whatever you entered, but it does not :(.

It works fine when you put the user control outside of the according control.

Your help is highly appreciated.

Thanks

Rukshan

hi Rukshan,

i tried your code, but problem is i'm gettign error that Sys is not defined. when you run your project see in status bar of browser if you see something like "Done but with errors on page".

i'll try to see if it works.

thanks,

satish.

Hi Satish,

I do not get such an error in the browser.

Anyways, to reproduce the problem all you have to do it create a user control and put a textbox , a label and a button. In the button eventhandler, assign the the text in the textbox to the text property in the label.

Next create a page and put an accordian pane. Place the user control inside the accordian. Run the app.. When you click the button after entering some text in the textbox, idealy you should see that value in the label. But it doesn't . If you put the usercontrol outside the accordian, It works fine.

Hope you got the picture now :D

Thanks

Rukshan

I was able to duplicate your issue. It seems as if the accordion control is not preserving the view state of it's composite controls. I am not a control guru but it seems that accordion should derive from CompositeControl instead of WebControl. This would do two things - help with the view state of the controls and also clean up the design time rendering.

But back to your problem. The work around solution is to do the following if you want the viewstate for your user control maintained:

protected void Page_Init(object sender, EventArgs e) { AjaxControlToolkit.AccordionPane myPane =new AjaxControlToolkit.AccordionPane(); testusercontrol myUC = (testusercontrol)Page.LoadControl("~\\testusercontrol.ascx"); myPane.ContentContainer.Controls.Add(myUC); Accordion1.Panes.Add(myPane); }

And then just do the following for the accordion in the ASP:

 <cc1:Accordion ID="Accordion1" runat="server" SelectedIndex="0" Width="100%" Height="100%"> <Panes> </Panes> </cc1:Accordion>

Let me know how it goes.

Hi Cloris,

Thanks a lot, you solution works. Wonder what made it preserve the viewstate when the controls are added in code.

Anyways, it solves the problem. :D

Thanks again!

Cheers

Rukshan

I am not sure what caused this problem. I have been using the Accordion as my intro to web controls. I think it has something to do with the control and how it keeps track of where it's data is coming from - a datasource or the panes tags. When it tries to make the decision to reload the panes from the tags, it is not getting what it expects from the view state. So it just reloads the panes from scratch - killing the viewstate. There is some work that needs to be done in CreateChildControls and elsewhere. Definately a work in progress. The Accordion does function fine when attached to a datasource though.

Im new to this, i still dont get how this works? So do you HAVE to have your bits within a . ascx control in each pane and not just have a button to do something within the pane?

Also what do you need to put into your asp part of code so it knows where to look.

Thanks
Adam

Hi Adam,

You can just put your stuff within the pane. No need ot have a user control.

Thanks

Ruk

Thanks Ruk

But how do i set the code above to apply for my button control and not a usercontrol as explained earlier?

Thanks

Adam

Hi Adam,

I'm not sure if I understood your question properly, but I hope the following code would help

aspx file :

code file :

protected override void OnInit(EventArgs e) {base.OnInit(e); Button btn = (Button) Accordion1.Panes["pane1"].FindControl("Button1"); btn.Click +=new EventHandler(btn_Click); }void btn_Click(object sender, EventArgs e) { Response.Write("Clicked me ! "); }

Thanks

Ruk

That worked great, thanks!

Adam

Ok. But can you imagine this scenario.

1. First time I hit my page I render all accordion panes, with desired controls in it. Picture, Ajax.Rating control, ...)

2. Now I change some Rate in one of my panes. Page does PostBack

3. Now I can insert that rate in database, print message, do some logic...

4.problem: (I want everything that I binded in step 1 to see again after page is partially updated (I have Update Panel that wrap my accordion), That means I do not want again to bind my accordion panes, because this can be very time consuming!!!

5. My accordion does not show up.

Question: Am I missing something or have I logic error in my scenario?

Regards, Veroljub

Wednesday, March 28, 2012

Accordian - Issue

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