Web Forms :: TreeView CheckedNodes Collection Empty On Button Click And Postback To Server
Mar 22, 2010
I have an ASP .Net TreeView control that I am dynamically adding tree nodes to from my codebehind on Page_PreRender. The TreeView is populated nicely and the appropriate checkboxes are where they are expected to be. For each of these nodes the SelectAction=TreeNodeSelectAction.None. However, when accessing the TreeView CheckedNodes() collection in my codebehind after selecting a few nodes (checkboxes are selected) and clicking a submit button to post back to the server in the button click event, my CheckedNodes.count() = 0. I can not figure out why my CheckedNodes collection in the codebehind does not contain the nodes that I have checked from the GUI.
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Jul 15, 2010
I'm coding an Webpage in VS.NET 2010[C#] that scans the Serial Number of Product into a Treeview in a Work Order > Box > Product hierarchy.
What I wanted to do was to use the following to Remove the ChildNodes:
//Use the GetEnumerator method to create an enumerator that contains the root node data.
IEnumerator nodeEnumerator = myTreeView.CheckedNodes.GetEnumerator();
// Iterate through the enumerator to display the root nodes.
while (nodeEnumerator.MoveNext())
{
/In here I would like to Remove the TreeNode
//MessageBox(((TreeNode)(nodeEnumerator.Current)).Text);
}
}
else
{
MessageBox("The TreeView control does not have any nodes.");
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May 7, 2015
I add this code but textbox value show in empty in database .. On Button Click the GridView TextBox loose all data ..
public partial class keyexam2 : System.Web.UI.Page {
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[CODE]..
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Nov 18, 2010
I have a MyLinkButton : LinkButton.
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Mar 28, 2011
I'm using a custom ashx handler to handle a file upload. When run locally, the file uploads fine.When I use the same setup on the web server I get a "Index out of range" error.In firebug I see the binary contents of the file in the post data and the file name is also passed in the query string.Any one seen this before?I`m sure its something minor, but its driving me up the wall.
Request header:
Key Value
Request POST /Secured/UploadHandler.ashx? HTTP/1.1
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[code]...
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Apr 29, 2010
I find a special circumstances as follows:
My web form contains a postback button. The button will postback and call a server-side method. The method will process something that may spend about 20 seconds. However, user may try to click the button several times within the waiting period. The sequential clicking may cause the first running method incomplete and stop, since the second click postback will dominate the method and start again. How can I solve it?
PS: It can not use client side script to disable the button, because it requires to use some server-side validation within the method.
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Aug 18, 2010
I have two text box and one button with asp.net Validation control on button click i have this below code..
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Sep 4, 2010
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May 4, 2010
Background: I am customizing an existing ASP .NET / C# application. It has it's own little "framework" and conventions for developers to follow when extending/customizing its functionality. I am currently extending some of it's administrative functionality, to which the framework provides a contract to enforce implementation of the GetAdministrationInterface() method, which returns System.Web.UI.Control. This method is called during the Page_Load() method of the page hosting the GUI interface.
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I placed breakpoints at the beginning of each event handler method and stepped through my code. On the first click, none of the event handlers were triggered. On the second click, they fired.
Example of Button Definition (within GetAdministrationInterface)
[Code]....
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Nov 12, 2010
when i click on button then postback happen but i stopped the postback. my code is follows.
[Code]....
here ShowDiv() function return false. another thing i notice that when i comment all the line in function ShowDiv() then postback is not happening. i just do not understand if i generate a div and add to page from javascript then why postback happening. tell me the solution to avoid postback when i will generate div from any function.
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May 7, 2015
radiobuttonlist Value is not saved when saving on where the problem is?
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[CODE]...
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Mar 24, 2010
I dont know what happened but none of my buttons or linkbuttons causes a postback anymore. I have dragged a few updatepannels on the page but the linkbutton concerned is not enclosed within an update pannel. when I click it there is just no postback happening anymore. I set the debugger at Page_load but...its not reached. I used firebug to analyse the http requests. there is none. its like those are not considered buttons anymore.
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Nov 11, 2010
I have created a user control which has a form and 2 buttons; Save and Submit. Both buttons are created at design time. Users can enter details in the form (e.g. title and description of an item) and click Save which does some server-side processing to create an 'Item' then clears the form.
The buttons:
[Code]....
[Code]....
And a placeholder to add dynamically created controls:
[Code]....
I am saving the Items in ViewState and dynamically creating a LinkButton control for each Item which allows the user to edit the item:
[Code]....
[Code]....
Now, when I test this in Visual Studio 2010, it works fine;
1. Enter Item title and description in form
2. Click Save
3. Save button triggers postback and onClick event code is run
4. ViewState list is displayed below the form
When I create a local IIS web site for testing, the postback on the Save button only works the first time I click it. Postback is false on the second click and the page reloads without running the onClick event code.
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Jul 15, 2010
I have page on which I've a login control in which I've a subnit button. The problem is this that when I refresh the that page the submit button or any button that was clicked last before page refresh gets its click event automatically fired.
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Aug 6, 2010
I'm reading an invoice dataset and building a html table with checkboxes and textboxes in it, and I put that code in a postback = false block, then i got a button and a literal. The button click will loop through the html table checkboxes to calculate a total and assign it to the literal and display it. I got everything working except one thing, every time i click the button, the html table refreshes and lost all the value in textboxes....even though I put the html building block in the postback = false block,it seems like it still won't preserve the values in the textboxes once there's a button click...Anybody knows a solution to that? I want the textboxes keep what values are there.
Here is the code part:
[code]....
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Feb 9, 2010
I have a GridView within an UpdatePanel - <asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="true">
Without listing any Triggers, I get a full postback when I visit a particular row within the GridView and click the 'Edit' button for that row.
However, if I enter the following trigger...
<Triggers>
<asp:AsyncPostBackTrigger ControlID="GridView1" EventName="RowEditing" />
</Triggers>
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I can find to add to the <Triggers></Triggers> section to get a click of the 'Update' button to result in an async postback, but with no luck.
What EventName should I use in the <Triggers></Triggers> section to get a GridView to do an async postback when clicking the 'Update' button for a particular row?
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Mar 22, 2011
Server Click event is not being triggered when I click on the "LookupButton". The weird part is that this code works on our Dev server, but not QA. If I get rid of "LookupValidationGroup", from the Lookup Button ValidationGroup property, the page does postback, but then my validators do not work. I could explicitly do the validation on the Server Side, but dont think I should need to.
No errors are being displayed. I also reinstalled .net 3.5 using aspnet_regiis -i command.
[Code]....
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Jan 5, 2011
Any code related to modal popup to stablise is necessary and if the values are enter correctly then modal popup should get post back.
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Dec 29, 2010
i am working on a project.but i have a problem.basically,i am using ajaxtoolkit tabcontainer.assume that i have 2 tabs which i created.let's call them tab1,tab2.in tab1 there is a button and textbox.when i click the button,i am writing some text into the textbox. then i am creating a tab dynamically. assume that it is called "tab3".the problem is when i click the button in the tab1,tab3 is diappearing.how can i prevent this?
<asp:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="0" AutoPostBack="true"
Height="273px" Width="1050px">
<asp:TabPanel runat="server" HeaderText="tab1" ID="tab1">
<ContentTemplate>
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tp.ContentTemplate = Page.LoadTemplate("WebUserControl1.ascx");
tp.ID = "tab3";
TabContainer1.Tabs.Add(tp);
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Mar 25, 2010
how we can access the Remove button event of the Collection Editor dialogue box?
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Jan 28, 2010
I am creating a button dynamically in my code and attaching a click event to it. However I have to prevent people to click it while there is a process going on. So when it is clicked once, it should be disabled and when the process ends it should be enabled. How can I do that?
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May 24, 2010
I have an ASP.NET file upload control which sits as part of a form. The file upload control is on the content page while the form definition is on a master page across the site. I've added multipart/form-enc to the form on the master page.I'm using jQuery to submit the form as I show a dialog box from jQuery UI.When I post, no file is returned to the server. The file upload control has no file and HttpFileCollection is empty.
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Feb 24, 2010
I have an ASP page with the following repeater:
[code]....
Why is the collection empty, when there are controls drawn on the screen?
(BTW: I tried adding/removing the EnableViewState="true" tag)
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Mar 22, 2010
In my project when i click any button or linkbutton, it doesnt fire any event or doesnt postback.
It was working fine but now it hv problem like this.
I think i have changed some settings by mistake.
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Mar 2, 2011
Here is my requirement -
1. I need to load a user control on link click event of a link button during postback of aspx page.
2. On button click event of a save button on that aspx page, I need to read the selected values from that user control on further postback.
If I write the loadcontrol code in link_click event, the control is not recognized at all in the button_click event. When I shift it to page_init and execute only during not postback, the user control loads with default values.
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