.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

Treeview does not triggers updatePanel

Posted By:      Posted Date: May 22, 2011    Points: 0   Category :ASP.Net

got a asp:treeview in a updatePanel with PopulateOnDemand event.
when I press to plus signs to a node it populates the child nodes of it.But does not trigger the Updateprogress.
for UpdatePanel and asptreeview all settings are standart.

whatz wrong with it ? how can I force the trigger of UpdatePanel When I press PLUS signs of treeview ?

(thanks before for any asnwers)

View Complete Post

More Related Resource Links

Question about the treeview in a updatepanel

 Hi,guys. I meet a question when i add a treeview in a updatepanel. I want that when I click the expand/collopse tag, it trigger the AsyncPostBackTrigger and the TreeNodeExpanded event, and when i select one node of this treeview, it trigger the PostBackTrigger and the SelectedNodeChanged event. In the SelectedNodeChanged event, I want to do "Response.Write". Now I program as the following: <asp:UpdatePanel ID="UpdatePanel1" runat="server">        <ContentTemplate>            <asp:TreeView ID="TreeView1" runat="server" OnTreeNodeExpanded="TreeView1_TreeNodeExpanded" OnSelectedNodeChanged = "TreeView1_SelectedNodeChanged">            </asp:TreeView>        </ContentTemplate>        <Triggers>        <asp:AsyncPostBackTrigger ControlID="TreeView1" EventName="TreeNodeExpanded" />        </Triggers>        </asp:UpdatePanel>   And: protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e) { Reponse.Wri

Radiobuttonlist triggers updatepanel only a few times adn stops working


I have a radiobutton that triggers the updatepanel to display or not..

when the page loads, i can select yes adn it displays, i can select no and it disappears.. i hit yes it reappears.. but after like the 3rd time going back and fourth testing the functionality, it stops displaying all together.

Is there something i need to look at to find out what is going on?

Here is my code on the page and code behind

            <asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional" >
            <div id="camDL" runat="server" visible="false">
                  CONTENT GOES HERE
                    <asp:AsyncPostBackTrigger ControlID="rblEnableCamDL" EventName="SelectedIndexChanged" />

        protected void rblEnableCamDL_SelectedIndexChanged(object sender, EventArgs e)
            if (rblEnableCamDL.SelectedValue == "1")
                camDL.Visible = true;
            if (rblEnableCamDL.SelectedValue == &qu

UpdatePanel is not a known element - message when upgrading to 1.0 ajax


It worked on one of my old pages.  I change the web.config, renamed all the <asp.

On some aspx page it doesn't recognize the updatepanel.  It only does on one page.  If I create a new aspx page with a different name - then it works.

Should I just create a new web project ajax - then copy all my code into there?  Or is there a way to get those old pages to recognize the new ajax controls?

Gridview inside updatepanel


I am displaying large amount of data in gridview,the gridview placed within updatepanel,every 1sec i am refreshing updatepanel using ajax timer.my problem is while displaying large data the cpu performance is low,pls give idea to increase cpu performance..

JQuery Treeview plugin is not working with Ajax page load in ie8


Hi there,

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.

Any idea?

Thanks in advance.

Wicked Code: UpdatePanel Tips and Tricks


Jeff Prosise explains when it's better to use UpdatePanel and when it's better to use asynchronous calls to WebMethods or page methods instead.

Jeff Prosise

MSDN Magazine June 2007

Data Points: Disabling Constraints and Triggers


What to do when you need to disable triggers and constraints to perform data synchronization and other tasks with an offline database.

John Papa

MSDN Magazine April 2007

How do you insert a google map into an ajax updatepanel?


I have built a site that I am using google maps on.  The default page has a google map with info windows containing links and all works great... until a user clicks on the link in the info window.  Doing so takes them to a community page that I have built.  On this community page, I have an ajax update panel that has 2 panels nested inside of it with the visibility set for one to be on and the other off.  The default panel shows community photos, and the second panel I want to show the google map and common directions to the community.  In testing, my buttons to switch the visibility of the panels works great as it should without postback, but when I try to add the map to its panel, it does not show up.  I am new to ajax as well as google maps and I'm not sure why the same code would work fine on my default page but not the community page.  The only obvious thing I can assume is because the community page map is in an update panel.  

How do you insert a google map into and ajax updatepanel and have it work correctly?  Many thanks in advance. 

TreeView Help


Why the label.text is not showing the correct result after clicking three time on treeview.

I have TreeView1 and TreeView2 on my webpage and a label1
TreeView1 a list of items and TreeView2 contains another list of items

Now the first time I click on TreeView1 on the first item which is "Hello" label1.text show me Hello
the second time when I click on TreeView2 on the first item which is "World" label1.text show me World
the third time I clicked on TreeView1 on the first item again which is "Hello" label1.text show me World.  label1.text suppose to show me Hello, right?

What could be the problem what am I missing?

protected void TreeView1_SelectedNodeChanged1(object sender, EventArgs e)
Label1.Text = TreeView1.SelectedValue;
protected void TreeView2_SelectedNodeChanged(object sender, EventArgs e)
Label1.Text = TreeView2.SelectedValue;

Treeview: Select all children if Parent is selected etc...



I'm using a Treeview with  ShowCheckBoxes="All" , so basically I have a tree with all CheckBox Nodes. I'm using the TreeView inside an update panel, and populate the Tree code behind dynamically.

My requrements are the following:

1) Select all the children if parent is selected,

2) When parent is selected, and if we de-select a child, set parent unselected

3) Track if new nodes were selected and previously selected nodes were de-selected (becasue I need to update the database according to the selections in the Tree)

For above 1, I do the following:

protected void TreeView1_TreeNodeCheckChanged(object sender, TreeNodeEventArgs e)
        foreach (TreeNode node in TreeView1.Nodes)
            TreeNodeCollection col = node.ChildNodes;
            //select all children when the parent is checked
            if (col != null && node.Checked)

ModalPopup/UpdatePanel from codebehind, inconsistent behavior onClick


First post bear with me please:

I have a simple form with a list of linkbuttons, each fires the same onclick event which sets an indicator image.  I have a dummy button with style="display:none" which I have set as the TargetControlID of the modal.

onClick event from the imagebutton, the modal is shown via modal.Show().  The cancel button inside the modalpopup fires an event which turns off the indicator image and hides the modal via modal.Hide(). 

The events fire perfectly, it's very simple!  Although after doing some testing I noticed the modalpopup is not presented after the 6-10th cycle of clicking the open event, then clicking cancel.  The grey background appears but it is behind the main panel and the modal is either presented behind this or is just simply not displaying. 

I spent hours researching various methods, implemented the CancelControlID to see if it was somehow tied to my call of modal.Hide() that fails.

This occurs with an updatepanel only.  The behaviour is much cleaner this way, so I would hope to be able to implement this.  I have basically eliminated everything but these two events!  Please help

Treeview problems in Update panel



I tried using this code, on a Treeview inside an update panel, which is populated dynamically in code behind. 

However, it doesnt give me the required functionality.

Following is my aspx code for the TreeView and the TreeView populating logic:


<div id="treelist">
<asp:UpdatePanel ID="UpdatePanel1&quo

UpdateProgress with a dummy updatepanel not working


I have a Submit button and some functionality like updating DB and fetching next page in the button click event. This process takes a long time and I want to display a message saying "Progress...." right after clicking the botton. I want to do the same in 20 other pages. So, best way to do it wd be to put the modalpopup MPE or an Updateprogress in a usercontrol or in master page. I first tried putting both of these on the page itself to test and see and neither worked.

I tried using Update progress control with a dummy updatepanel and giving the Submit button as Asyntrigger to the dummy updatepanel. I have also tried using MPE but it didnt work either. Below is an example of what i did..

<asp:UpdatePanel ID="UpdatePanel1" runat=server><contenttemplate><triggers><asyntrigger ID= "Submit"> /> /> />

<asp:updateprogress ID="Progress1" unat=server AssociatedUpdatePanelID="UpdatePanel1"><Progresstemplate>Progress.... />/>

<asp:button ID= "Submit" runat=server >

I have nothing for updateprogress in code behind. Am i missing or doing somethign wrong here? Any help would be appreciated.

UpdatePanel in a Webpart


I'm exploring the usage of UpdatePanels in WebParts for MOSS 2007. The code I have so far for adding a test update panel is this:

                LinkButton goButton;
                goButton = new LinkButton();
                goButton.ID = "butGo";
                goButton.Text = "Go";
                goButton.Command += new CommandEventHandler(goButton_Command);
                goButton.Click += new EventHandler(goButton_Click);

file upload in Create User Wizard Created User event with UpdatePanel Tag wont work?



In my Create User Wizard1 Created User Wizard Event, I am collecting extra information from text boxes and allowing

the user to uplad a file.



I have put the Submit button within an Update Panel Tag but since I have done this it does not work.

Is there a way round it. In this situation would you use a trigger.?


<br />

  <asp:UpdatePanel ID="UpdatePanel2" runat="server">

  <asp:Button ID="StepNextButton" runat="server"  CommandName="MoveNext"  align="middle"
                                            Text="Submit my Profile" />

ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend