have embedded a TreeView inside an Update Panel, PopulateOnDemand in use.When a top level node is expanded everything is fine - the level 1 (zero base) nodes are populated.When on of these lower level nodes is expanded the tree Collapse
View 2 RepliesI am Trying to build a Treeview Control using an XMLDataSource which consumes a XML file (which is set dynamically) . The Problem is that the XML file Size is huge, arround .5 MB so the page load is hit because of this . Now i know that there is a PopulateOndemand Property of the treeview and there is also a populateondemand property of Treenodebinding which is used in XMLDataSource .
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.treenodebinding.populateondemand.aspx
I have a TreeView that is bound to a XmlDataSource control. I've added some TreeNodeBinding elements to define how I want the XML data to be shown.
I have also added PopulateOnDemand=true to these TreeNodeBindings. However, doing so didn't change a thing and the entire XML tree is displayed. Moreover, the TreeNodePopulate event is not fired on node expand as well.
I'll start off by stating that I've read numerous posts with the same or similar errors but haven't found anything to solve my issue. I'm getting a lengthy error message:
Sys.Net.WebServiceFailedException. The server method'GetSlides' failed witht he following error: <html>
<head> <title>Unknown web method GetSlides<br> ....
I appreciate any insight. See inserted code.
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I have a javascript function that is called on tab change of a tab container.From that javascript function, I call a simple page method.But though the page method does everything correctly, a failure is reported.Here is my code:
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Is it mandatory to pass the Success and Failure method names as parameters while calling server side methods using PageMethods in client script.
I referred to article [URL] ....
'm using the AutoCompleteExtender from the AJAX control toolkit on my aspx page - I have it wired up to a WCF service that is returning a string array and everything works happily.
If I change my service definition to include a demand for the caller to be authenticated, like so:
<OperationContract(), PrincipalPermission(SecurityAction.Demand, Authenticated:=True)> _Public Function GetLookupValues(ByVal prefixText As String, ByVal count As Integer, ByVal contextKey As String) As String()
Then the autocomplete extender stops working, and I get an authentication error in the service. The service is set up to use ASPNetCompatibility mode, and I was hoping that the extender would pass the authentication credentials for my logged in user - does anyone know how to make this work?
Periodically a rash of occurrences of the following error happen. I believe they're the result of hack attempts. Whether that's the case or not, my question is how can I handle the error? I want to avoid unhandled exceptions. The TreeView control is just
a standard .Net TreeView control, not a custom one. If you suggest a code solution, please code it in VB.Net as that's what I'm using.
Message: Input string was not in a correct format.
Stack Trace:
at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
at System.Web.UI.WebControls.TreeView.LoadPostData(String postDataKey, NameValueCollection postCollection)
at System.Web.UI.WebControls.TreeView.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection)
at System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
how to write Css for asp.net treeview by applying color and theme like (msdn website treeview)?
View 1 Repliesi have a very large amount of data which i need to view in form of a tree. The problem is, that this runs sometimes into a timeout exception or it takes very very much long! I saw in several Application that others build up a tree where the node expand and load the data partially. So i would like to build something like this for my application, too, but i dont know how to contruct this.
- MyTreeNode1
+ MyTreeNode 2
- My TreeNode 3
wait while Data is loading ... (or the treenode is getting built up and i see it live, instead of showing an progress indicator)
+ My TreeNode 4
i dont know how to do this but would like to learn :) Could someone give me the right keywords to look for, or guide me?
how to update treeview using updatepanel?I am binded my treeview using xml datasource,periodically the datasource was updated,so i am used updatepanel in treeview but, it is not updating while changes came.when i refresh that page ,it is update
View 2 RepliesI have read several post on the TreeView is not/partly working with the UpdatePanel, but none of them mention that an update (triggered by a timer) causes creation of multiple javascript functions in the HTML header. In Mozilla Firefox this a memory leak. I have created a test webapplication to demonstrate the issue we encounter.
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I have some Issues 1)Can we use asp.net Tree view with Update Panel??I am using its event like populate and checkchanged etc If yes then please give Reference if available or whatever possible 2)When User Click on checkbox of treeview by the help of javascript "__dopostback" i am able to use checkchange event when user click on check box of treeview how can we handle all this by update panel to get rid of post back or others teachnique ??
View 3 RepliesI have treeview on my webpage , I am populating it on server side coding.All the tree nodes are documents like .doc or .pdf and with their path as navigation url. My problem is that when I click on node , it takes time to load the document. So I need to show progress bar for the time it takes to download the document form server.
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I have a treeview which will be generated dynamically which need to be displayed on left side and when user clicks on a node it need to open a page on the right side of the same page. and each node has different aspx page. so whenever user selects a node the page details should be displayed on the right side .we can use an iframe on the page which will display the different pages clicked on the node.Is there any alternative i can use to display different pages based on the user selection on the right side without using iframe.
View 5 RepliesCode to drag and drop a TreeNode to another control or tag such as Div or even another TreeView.
View 1 Repliesi have done a simple program tat enables drag and drop functionality in asp.net webforms..i hav implemented this using 2 tree views in my page...
but now i need some idea to how to drag the text from textbox to the tree nodes..
i hav searched net but can't get clear idea...is there any control in ajax which enables this feature..
I'm working on an ASP.NET (.NET 4, VS2010) app that needs folder browsing/picking capabilities. I've got it mostly working, but I'm stuck on one last thing. (see below) Also, I'm using AJAX UpdatePanel, TreeView control, and AJAX Control Toolkit ModalPopupExtender.
When I go to the page, I load the TreeView with a top node and a first set of child nodes, which are the found drives of the server. Then I click a LinkButton to open the ModalPopupExtender, which contains the TreeView. When I click the nodes of the TreeView, the node expands and builds a set of child nodes which are the folders found.
What I want to happen is to allow the user to navigate through the TreeView, selecting drives and folders until they find the one they're looking for. Then they click OK to return the path selected back to the main form.
The problem is that any click of any node in the TreeView causes a postback and my ModalPopup closes. how to accomplish this task? That is, how can I keep the ModalPopup open while the user clicks through nodes of a TreeView in which the child nodes are populated dynamically?
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I am having a treeview in Masterpage,all tree items are associated with different page,when i click on any of the tree item,i the respective page should be displayed in the ContentPlaceHolder of the masterpage without postback,
i kept the treeview and the contentplaceholder in the updatepanel,still it is not working,means entire page is posting back to server
Here is my code
<form id="form1" runat="server">
<div>
<table>
<tr>
<td valign="top">
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How to bind TreeView Control in asp.net using C# code?
View 1 RepliesHow can i create a Treeview with Drag drop functionality.
I want to show the values in my tree from DB.
I have a tree-view which doesn't have any events and AutoPostBack property is also false. But whenever the treeview node is selected,its taking a lot of time...The tree view is placed inside update panel...I have an update progress and selection of any node shows the progress for atleast 5-6 seconds.
The code is as below :
<asp:UpdatePanel ID="updatePnlListBoxes" runat="server">
<ContentTemplate>
<table align="center">
<tr>
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The script manager is in Master page.
I developed a page where i m using jquery treeview plugin to generate tree. It worked fine on FF, IE8 with out ajax.But when my page loads thro' ajax call in IE8, it is not collapsing or expanding tree.
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I am used treeview control within updatepanel,updation was no problem but i am unable to control treeview node expand and collapse.
I have a treeview and a button inside a panel. On a click of button 'btnView' i want to show the panel. So i decided to use the ajax modal popup. Every thing is fine but mu popup closes on selecting a node in the treeview. Actually i want to close the popup on click of button 'btnOK'. Here is my page markup
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