Web Forms :: Attributes.Add() Onclick Event Disappearing After Postback?
Mar 29, 2010
- I've created a Survey with multiple sections in it
- The answer types are variable and, thus, the controls are created dynamically
- I have a Repeater where each RepeaterItem corresponds to a Category. (I have 5 categories in my current test, so I have 5 DataItems in the Repeater) Each RepeaterItem contains another Repeater which will hold the Question / Answer values
- After I data bind the Category Repeater, I loop through each RepeaterItem, find the Repeater contained in each RepeaterItem, and DataBind() this second Repeater to a list of Questions
- After DataBinding the Repeater containing the Questions, I sent that Repeater object to another routine, which is where the Answer controls are dynamically created and added to a Panel inside each of this Repeater's RepeaterItems.
I am able to navigate back-and-forth among Categories, save / delete answers, and fill in answers for Surveys that were left incomplete when a user logs back in.
One of the the potential control types for an answer is a ComboBoxList.
Each Question has an option for answers that require a ComboBoxList called "MaxAnswers." When this value > 0, I inject a little javascript that prevents the user from selecting more boxes than the "MaxAnswers" value. This is done during the last step described above like so:
[Code]....
This appears to always be added regardless of how many questions I answer or don't answer or how many times or directions I navigate around inside the survey. (I can push "Back" and "Previous" buttons as well as jump directly to any individual category by clicking a LinkButton)
Another option for Questions requiring a CheckBoxList is to specify if the selection of a specific ListItem within the CheckBoxList should display a TextBox. (e.g. a selection of "Other" will display a TextBox for the user to write-in an answer) I want to prevent a post-back just to show/hide a TextBox, so I inject an onclick event attached to the specific ListItem to accomplish this. The following code appears as the very next routine following the code pasted above:
[Code]....
This also works the first time the page is loaded but not after any PostBacks...
The lblMessage.Text lines are written to the page after ever PostBack, the MaxAnswers routine correctly adds the onclick event to the necessary CheckBoxList controls, but the "fncShowFTB" event is not added. Viewing the HTML with Firebug does show the onclick the first time the page is loaded, but it's missing after every subsequent postback.
Can anyone see what I am doing wrong that causes me to lose this event?
I am using the following code to load user control on to ASPX Page, which under a Master Page:
[Code]....
The user control name is passed as a parameter on the URL.
Inside the user, there is a LinkButton. The link button has a simple server side code for OnClick event.
Everything is working fine on the production machine, but, on the Development machine, I can see incorrect behaviour. I have started making some development changes on the Development Machine since several months back, and it will be very difficult to find out what caused the problem.
When I click the LinkButton inside the user control, the user control is removed from the parent page, and the OnClick event of the LinkButton is not firing.
I did debug, and found out that after I click on the LinkButton inside the user control, then the Page Load events for the master page and the ASPX page are working fine, and the IsPostBack is set to true, but the OnClick event of the LinkButton is not firing.
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.
I have an odd error with an ASP.NET web page (ASP.NET 2.0, C#). For several users at one customer location, on one part of one page, HTML content and attributes are being stripped out. So, something that should look like this:
<p class="adminmainlink"> <a href="ad_resourcewizard.aspx">Add or edit resources</a> <script type="text/javascript">
I know this topic has been posted before but I'm stuck on it still.I've placed creating of dynamic control on Page_Load but the event isn't firing.On my asp page, i have <asp:PlaceHolder ID="test" runat="server/>On my code behind, I have private display method.
private void DisplayButton() { LinkButton btn = new LinkButton(); btn.ID="unit_1";
I have used jQuery to invoke an AJAX webmethod in c#. This webmethod runs a query and stores the resulting information in a session variable. I have a gridview that has an objectdatasource that uses the session variable with the selectmethod to then populate the gridview with data from a query. I need the final piece to get the gridview to databind() again with the new value.
So click map, update gridview. However, maybe I'm going about this all wrong. In essence, take javascript variable, push to ASP.NET in C# and refresh gridview on page with new data from query.
How do I setup a default setting so that if I do not set an OnClick (i.e the asp.net OnClick attribute) explicitly for an asp:LinkButton tag, it will not render an onclick(html attribute for javascript) attribute client side? By default, asp.net adds an onclick='doPostBack....' for the LinkButton.
Case for use:
There is a LinkButton tag on the page. For this page, if the user has one friend, I only want to run client side code if the button is clicked and would not for any reason want to make a post back. If the user has more than one friend I would want a click to trigger a postback.
Using any asp.net Ajaxtoolkit
Dynamically switching the control type (i.e. if friends == 1 use a asp:Hyperlink)
-I want to avoid this because it is not scalable. There might be many cases where I want an asp:Link tag to do a postback or to not do a postback depending on the user context or user attributes Using OnClientClick (I am using jQuery would like to avoid this)
I have a site that show infomation that are contained in div blocks. The info is taken from a database so the user can change the info or delete it. When the user deletes a div block i want to use jQuery to animate that its disappearing and also that its deleted from the database. How can i do this without doing a postback, i dont want the site to reload, i just want the Div block to disappear visually and be gone from the database at the same time. Would i use Ajax update panel to achieve this ?
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?
well i have already created the rows and cells dynamically using asp.net table control ...but how to add an onclick event on that ...so that i could retrieve the corresponding cell when a particular row is clicked ...if it was a html control ,i could have used javascript but in this particular case m unable to find any solution..
i need 2 disable a link button click.. when i give btn.Attributes["OnClick"] = "return false;"; it will work but when i take the mouse over the button its style is maintained as tat of the link, but the link wont work. ijust want to make it apperar as a label.
have a user control that has a data repeater. When the ItemDataBound even is raised I create a html table which contains a button on each row. The button is created in a seperate class, not in the code behind, so when I attach the button click event I have to put the click method in the class that creates the control. However, when the button is clicked I need to open a modal form in the page that contains the button. How can I move the event back to the web user control with the sender object? I suspect I need to do something with a delegate or something, but I am having a hard time putting how to do that together. Can someone tell me how to do this?
I am having a treeview with nodes of products populated on first time through xmlresponse.Onselectednodechanged event, I have performed xmlseriaization to build a request to get list of subproducts. Now, my issue is how do I handle the next On_click event requesting for items under subproducts which will inturn calls the same onselectednodechanged method and how do I write condition to skip above steps to occur, since I need to build a different request on click of subproducts asking for items.
I am trying to define an event on a listbox to allow users to click on a specific item and do processing on the event. I've tried the obvious OnClick and OnSelectedIndexChange events which are not part of the listbox collection of events.
I have an XML file that contains a list of training videos that our site offers. I'm using a DevExpress control called DataView and within the ItemTemplate I bind all the appropriate information. However, I have an ImageButton that I bind a downloadVideo(string fileName) function to the OnClick event. When I click on the image the function does not fire though. Can anyone see what I'm doing wrong?
[Code]....
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When I view the source of the page the OnClick event reads OnClick=downloadVideo(fileName.mp4) .
what i have is a form and when i click on a icon then in javascript it pops up a window with data bound to a grid. Now on that form if i hit tab in a particular text box how can i call that same window ( ie just call the javascript onclick event and pass the text in the text box) ?
I have a user control that displays a list of records. Users have the ability to open an embedded user control with a FormView to either add a new record or to edit an existing one. The UserControl with the FormView has a button that closes and hides the user control.
If the user control with the FormView is opened to edit a record, the code works fine. But if the UserControl is opened directly into Insert mode, the code craps out
I am having trouble with two buttons on a page. I dragged them on to the page and then double- clicked each of them in order to create the OnClick events.
I added my code to the events, but when I click the buttons, their respective events aren't being called.
i have a problem with some part of an applcation am developing, i have a button that works the first time its clicked and then does not work after that. There is a visible page post back, but the code is not executed. I want the a label on a page get a new value whenever the button is clicked.
Sub Button_Next_Click(ByVal sender As Object, ByVal e As System.EventArgs) x = Integer.Parse(Label_previous.Text) x = x + 1 Label_previous.Text = x End Sub <asp:Button ID="Button_Next" runat="server" Text="1" Width="65px" onclick="Button_Next_Click" />
I have a button that I cannot see or click in design view in VS but I can locate it in my source. The reason I cannot see it is because it is overshadowed by a panel that has a repeater in it. I am trying to create an onclick event for it. The way I normally do this is just double click on the button or click on it and click the small lightning bolt in properties and double click the Click event for the button. This time I cannot do that.
So, I tried to create an on click event by doing this:
However my button does not work... Its a very simple objective for my button, just adding a textbox value to a lstBox and I know its correct, so I know my code isnt broken. I just cannot get that button to fire correctly.
