Showing posts with label selectednodechanged. Show all posts
Showing posts with label selectednodechanged. Show all posts

Wednesday, March 28, 2012

Tree view nested in Accordion taking two clicks to fire selectedNodeChanged event

I have a treeview in one of my accordion panes. When I click on a node for the first time, instead of firing the selectedNodeChanged event, it just goes through a normal postback. However the second time I click it, the event is fired correctly. Is there another event being fired that I'm not seeing?

Here's a trimed down version of the code. Thanks for any ideas. -d

<atlasToolKit:Accordion ID="navAccordion" runat="server" Height="410"
FadeTransitions="true" FramesPerSecond="40"
TransitionDuration="250"
AutoSize="None"
>

<atlasToolKit:AccordionPane ID="AccordionPane2" runat="server">
<Header><a href="http://links.10026.com/?link=" onclick="return false;" class="accordionLink">Tank Groups</a></Header>
<Content>
<asp:Panel ID="navPanel" runat="server" ScrollBars="auto" CssClass="extraPadding" BackColor="white" Width="180" Height="200">
<asp:TreeView ID="navTankGroups" OnUnload="nav_Unload" OnSelectedNodeChanged="nav_SelectedNodeChanged" runat="server" SkinID="nav" >
<Nodes>
<asp:TreeNode Text="Page 1" Value="~/page1.aspx" />
<asp:TreeNode Text="Page 2" Value="~/page2.aspx" />
</Nodes>
</asp:TreeView>
</asp:Panel>
</Content>
</atlasToolKit:AccordionPane>
</atlasToolKit:Accordion>

Here's the selectedNodeChanged routine.

Protected Sub nav_selecedNodeChanged(ByVal sender As Object, ByVal e As EventArgs)
Dim navTankGroups As TreeView = CType(AccordionPane2.ContentContainer.FindControl("navTankGroups"), TreeView)
If Not navSchedule.SelectedNode.ValuePath = String.Empty Then
Response.Redirect(navTankGroups.SelectedNode.Value)
End If
End Sub


This appears to only be an issue on master pages. I placed the accordion in a new page and it worked fine. Anyone have an idea on why it is taking two clicks in the masterpages? -d

Hi dtamber,

I'm not sure what's going on with this... could you perhaps post the simplest possible version you have that still causes the problem?

Thanks,
Ted


Look at the source code before and after the button click, there is one of 2 possibilities.

1. someting being created dynamicly doesn't have an ID property set, in this case you'll see the treeview control in the source with different names

Like ctl03 and ctl05 in the treeview's name

2. I have fixed my postback issues by adding a hidden field to each accordion pane at page_init. I don't know why this fixes the erradic behavior, but it does.

Let me know if either of these works.

Chris


I think this needs a bump.

I just tried using an accordion in a usercontrol and added 3 panes, each containing an updatepanel containing a button.

The button click event is not fired. Adding a hidden field as Chris suggested allows the click event to fire.

Nathan


I also ran into the exact same problem. I was using a gridview inside an accordion and the events weren't firing the first attempt. If you add a control to it during OnInit then it appears to work. My assumption is that there's a problem with the RenderControls or something.

Astynax777:

I also ran into the exact same problem. I was using a gridview inside an accordion and the events weren't firing the first attempt. If you add a control to it during OnInit then it appears to work. My assumption is that there's a problem with the RenderControls or something.

Astynaxx777 - This clicking twice problem has been a real issue for me. Can you please elaborate with a small example if possible? You mean to add a control to the AccordionPane when the page loads (through the code behind)?

Your help would be greatly appreciated.


I ran into the same problem where I couldn't get a Button click event to fire off until I did whatCConchelos tried:

"2. I have fixed my postback issues by adding a hidden field to each accordion pane at page_init. I don't know why this fixes the erradic behavior, but it does."

Here's a basic example:

 
<body> <form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server" /> <div> </div> <cc1:Accordion ID="Accordion1" runat="server"> <Panes> <cc1:AccordionPane ID="AccordionPane1" runat="server"> <Header>Test1</Header> <Content> <asp:LinkButton ID="LinkButton1" runat="server">LinkButton</asp:LinkButton> </Content> </cc1:AccordionPane> <cc1:AccordionPane ID="AccordionPane2" runat="server"> <Header>Test2</Header> <Content> <asp:Button ID="Button1" runat="server" Text="Button" /> </Content> </cc1:AccordionPane> </Panes> </cc1:Accordion> </form></body>

The Button1 click event would not get called until I added a hidden field to the AccordionPane that contained Button1 on the Page_Init:

Private Sub Page_Init(ByVal senderAs System.Object,ByVal eAs System.EventArgs)Handles MyBase.InitDim myAccordionPaneAs AccordionPaneDim myTextBoxAs New TextBox myTextBox.Visible =False myAccordionPane =MyBase.FindControl("AccordionPane2") myAccordionPane.Controls.Add(myTextBox)End Sub

I thinkAstynax777 is right - there must be something wrong with the controls inside an AccordionPane when being rendered.


Thank you very much. It should be noted that after Astynax777's suggestion I tried it with a button and I forgot to hide it, and it didn't work as expected.

Excellent example, thanks again.


Hi,

has anyone found out more about this issue? As indicated in a previous post, the issue appears to be that controls are not rendered properly the first time the accordion is loaded. When the postback occurs, the controls have a different id, and no event is fired since it cannot be hooked up to the appropriate control (since the ID has changed).

I have a slightly different problem than those posted above as the accordion I'm working with is loaded via a datasource. I cannot add controls on the init event as a temporary fix. Any idea for a workaround would be greatly appreciated until this is resolved.

Thanks


btw, this "click twice" error disappears when I have only 1 accordion control on a page. If there are two accordion controls (one is data bound, the other is not), then I have to click twice. When I only have the databound accordion, it works as intended.

The good thing is that adding the "invisible" control to each pane in the Accordion which is not databound has fixed the "click twice" error in the databound Accordion.


Ok, I think I have this problem fixed. You can see the changes I made athttp://www.codeplex.com/AtlasControlToolkit/WorkItem/View.aspx?WorkItemId=5796 . There's 2 files I uploaded for that issue. I might help you... or it might not, I have not tested it for your problem but it certainly fixed mine! Good luck.


Has anybody else tried it with the new 10660 release? For me, the event handling never worked. My accordion is completely databound and does not contain any unbound panes. Consequently, the workaround will not work for me. I've just tried it with 10660, but no change.

Dennis Doomen
Aviva Solutions


I was having all of those 'click twice' problems but in randomly places. I used Accordions on many different pages and I couldnt figure out why it worked on some pages and didnt on others. I realized that on the page that it didnt work I was doing my control loading during OnInit and on my other pages that did work it was during PageLoad. Im guessing you have to make sure that everything must be done in one or the other. If you have User Controls make sure that your logic and things are also in it's page load as well. Dont mix and match :)

Posted by hexagonwerf at 8:00 PM 0 comments
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TreeView + SelectedNodeChanged + UpdatePanel = Problems

I wondered if anyone else has had strange behavior when specifying the SelectedNodeChanged event of a TreeView as an AsyncPostBackTrigger for an UpdatePanel. I'm currently seeing erratic behavior. Some nodes will post back when selected, and others won't; it seems totally random.

There was no problem before I upgraded fromRelease 60914 of the toolkit.

While we work closely with the ASP.NET AJAX team when developing the Toolkit, they're the real experts on general ASP.NET AJAX issues. Your problem doesn't seem to be directly related to the Toolkit, so we'd appreciate if you considered posting to one of theother newsgroups such asAJAX Discussion and Suggestions. Your post will be more helpful to others looking for similar advice if it's in the right place. Thank you!

I have Treeview inside asp:UpdatePanel.{ASP.NET Ajax RC version}

Its not maintaining its viewstate properly while expanding/collepsing nodes.

If I remove Updatepanel,, it works fine.

Is it a bug ?? what could be relevent and reliable solution.

Thanks in advance.

Rahul Jain

KY


This is still the wrong forum for this question, but I'll answer anyway: TreeView is not supported inside an UpdatePanel. Seehttp://ajax.asp.net/docs/overview/UpdatePanelOverview.aspx.

If you have a TreeView inside an UpdatePanel, it is better to have the following properties set as such PopulateNodesFromClient="false" and EnableClientScript="false". Hope this will solve at least some random problems when clicking/expanding/collapsing a treenode.

Cheers,

vince.n3t


Hello,

I tried a few things in my code & everything started working fine. But I get an error on the IE7 page (error: Invalid argument, Line: 43, Character:238).

On putting a break point & then debugging, I get a break on the JS page & the error points to --> accordion.insertBefore(wrapper, content)

I have no idea what this error means & how to debug it. Because everything on the IE7 page works as I want it to, but I get this error on the status bar as: 'Done, but with errors on page'.

Please help me with this error, as this a project I am working on & I need to complete it before the deadline. Any other options for creating a TreeView using any of the Ajax Extenders with the Update Panel are also welcome.

MyDefault.aspx :

<%@. Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="AJAXRajeev.Default" %>

<%@. Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>

<!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 id="Head1" runat="server">
<title>
Sales Professional Desktop II
</title>
</head>
<body>
<form id="form1" method="post" runat="server">
<div class="Default" style="float:left">

<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true" EnablePartialRendering="true">
<Services>
<asp:ServiceReference Path="WebService.asmx" />
</Services>
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<ContentTemplate>
<div id="MyAccordion" runat="server">
<ajaxToolkit:Accordion ID="Accordion1" runat="server" SelectedIndex="0">
<Panes>
<ajaxToolkit:AccordionPane ID="AccordionPane1" runat="server">
<Header><a href="http://links.10026.com/?link=" onclick="return false;" class="accordionlink" />
External Documents
</Header>
<Content>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Panel ID="navPanel" runat="server" ScrollBars="auto">
<asp:TreeView ID="TreeView1" runat="server" BackColor="Transparent" ExpandDepth="1" MaxDataBindDepth="2" NodeIndent="10" SkipLinkText="skip nav" Target="~/Default.aspx" ToolTip="navigation" Font-Names="Verdana" Font-Size="Smaller" ForeColor="Gray" ShowLines="True" PopulateNodesFromClient="true" EnableClientScript="True">
<ParentNodeStyle Font-Bold="False" ImageUrl="~/Images/folder.gif" />
<HoverNodeStyle Font-Underline="True" />
<SelectedNodeStyle Font-Underline="True" HorizontalPadding="0px" VerticalPadding="0px" ImageUrl="~/Images/folder_open.gif" />
<RootNodeStyle ImageUrl="~/Images/folder.gif" />
<NodeStyle Font-Names="Verdana" Font-Size="8pt" ForeColor="Black" HorizontalPadding="5px" NodeSpacing="0px" VerticalPadding="0px" ImageUrl="~/Images/folder_open.gif" />
</asp:TreeView>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1" runat="server">
<ProgressTemplate>
External Documents
</ProgressTemplate>
</asp:UpdateProgress>
</Content>
</ajaxToolkit:AccordionPane>
</Panes>
</ajaxToolkit:Accordion>
</div>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress2" runat="server">
<ProgressTemplate>
External Documents
</ProgressTemplate>
</asp:UpdateProgress>
</div>
</form>
</body>
</html>

MyDefault.aspx.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;
using AllianceBernstein.Wsg.Retail.Common.Data;
using System.Data.SqlClient;
using System.IO;
using System.Drawing;
using System.Web.Services;
using AjaxControlToolkit;

namespace AJAXRajeev
{
[Serializable]
public partial class Default : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label lblSelectedPath;
protected const string ROOT_PATH = "2:";

protected TreeView Tree
{
get
{
return Accordion1.FindControl("TreeView1") as TreeView;
}
}

protected UpdatePanel UpdatePanel
{
get
{
return Accordion1.FindControl("UpdatePanel1") as UpdatePanel;
}
}

protected void Page_Load(object sender, System.EventArgs e)
{
//UpdateProgress1.AssociatedUpdatePanelID = this.UpdatePanel.ClientID;

Ajax.Utility.RegisterTypeForAjax(typeof(AJAXPortal));
if (!Page.IsPostBack)
{
LoadTree();
}

Folder[] aFolders = Folder.List();

this.Tree.ExpandAll();
}

[Ajax.AjaxMethod()]
private void LoadTree()
{
if (this.Tree == null)
{
return;
}

Folder[] aFolders = Folder.List();
foreach (Folder oFolder in aFolders)
{
TreeNode oTreeNode = new TreeNode();
oTreeNode.Text = oFolder.Name;
oTreeNode.ImageUrl = "/images/folder.gif";
this.Tree.Nodes.Add(oTreeNode);

}
}

internal DataSet ListFolder()
{
throw new Exception("The method or operation is not implemented.");
}


}
}

Please help me with this.

Karamchand

Posted by hexagonwerf at 7:57 PM 1 comments
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Monday, March 26, 2012

Treeview inside updatepanel postingback on selectednodechanged

Hi,

I'm having problem with a treeview inside an updatepanel on my page. The treeview is populated from the client on the treenode pouplate event. The selection of a node in the treeview triggers the content of another updatepanel to be displayed according to the selected node. Everything works fine exept that the whole tree is postedback on the selectednodechanged event even tough the triggers for that update panel is on treenodepopulate.

Here's the code :

<%-- The treeview --%> <atlas:UpdatePanel ID="uptv" runat="server" mode="conditional" 
 <ContentTemplate
 <asp:Panel ID="panTree" runat="server" Height="600px" ScrollBars="Auto" Style="z-index: 102;
 left: 3px; position:absolute; top:5px;" Width="450px" CssClass="bordures"
 <asp:TreeView ID="tvEquipement" runat="server" Height="100%" Style="z-index: 100; left: 0px;
 position: absolute; top: 0px" Width="100%" ForeColor="ControlText" ExpandDepth="2" NodeIndent="10" 
 <SelectedNodeStyle BackColor="#D09200" Font-Bold="True" ForeColor="HighlightText" BorderColor="HighlightText" />
 <RootNodeStyle Font-Bold="True" /
 </asp:TreeView
 </asp:Panel
 </ContentTemplate
 <Triggers
 <atlas:ControlEventTrigger ControlID="tvEquipement" EventName="TreeNodePopulate" /
 </Triggers
 </atlas:UpdatePanel
 <atlas:UpdatePanel ID="upInfos" runat="server" mode="conditional" 
 <ContentTemplate>
<%-- stuff based on the selected node--%> </ContentTemplate
 <Triggers
 <asp:ControlEventTrigger ControlID="tvEquipement" EventName="SelectedNodeChanged" /
 </Triggers
 </atlas:UpdatePanel>

Any hep or idea would be greatly appreciated.

Thanks,

Max

The treeview is inside the update panel and childrenAsTriggers is set to true (Default is true). Therefore, if you click on control inside the update panel it would result in the
update panel getting updated. What you have to do is set ChildrenAsTriggers = false for the update panel with treeview.

On a different note: Treeview inside an update panel is not a supported scenario.

vineetc


Thanks for your reply. I don't seem to have that property. Is this a new feature from the Ajax Beta release. I'm still working with the last Atlas release.

The tree wasn't in an updatepanel at first, but I had to put it in one because the selectedvalue property was messed up when outside the updatepanel.

Max


Ajax beta release has this property. Also Property "Mode" of the update panel is renamed to "UpdateMode".

vineetc


Posted by hexagonwerf at 12:58 PM 0 comments
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