Web Forms :: How To Activate Javascript Function From Page_Load And Updatepanel
Feb 13, 2011
In the first Page_Load, I am activating a javascript function to make an ImageButton change between 2 images with an interval.
This works fine.
Now when pressing this imagebutton, the Page_Load event will fire the second time and all this is happening in an updatepanel which means a partial postback.
The question is how to execute the javascript function stopbk() in the Page_Load event in this scenario as I cant just put it in the "Onload". How can I make that work?
I am using a Timer with a 3 minutes interval. I am exeuting the Page_Load event every 3 minutes. I am doing that this way as I have all this code inside an UpdatePanel1 which causes
a partial unnoticed postback to the server. I have a lot of code in the Page_Load event that I haven´t put here.
But what does not work is the code I have in the Page_Load event now.
I am trying to execute the javascript function with this line: body1.Attributes.Add("Onload", "startbk()");
This function should start an imageButton to change image between 2 images. This function do works if I refresh the page so the function itself do works.
But it seems this function does not execute when the Timer executes the Page_Load event, so this is my problem how I can solve this?
function SetScrollEvent() {Â window.scrollTo(0, document.body.scrollHeight);}
I update update panel from server side like below.
protected void rptList_ItemCommand(object source, RepeaterCommandEventArgs e){ //HiddenField hiddenId = e.Item.FindControl("hiddenId") as HiddenField;Label lb1 = e.Item.FindControl("Label2") as Label; //Button bt = e.Item.FindControl("Button2") as Button;if (e.CommandName == "myclickevent"){ // your codes here...SqlConnection conn = new SqlConnection(constr);SqlCommand
[CODE] .....
I use repeater and repeater have button on button click i update the update panel. now where i have to call the javascript function so that it execute after update panel fully loaded. I want to call javascript function after page fully loaded.
I wanna assign a JavaScript CallBack function to an UpdatePanel which will be gets called when the UpdatePanel finishes its tasks. After, the UpdatePanel will be sending a string as a result. This JavaScript CallBack function will have to process this resulting string.
I have a asp.net listbox server control that is connected to a jquery plugin that can handle a client side click event for each of the checkboxes it renders.
Whenever I click on a checkbox the click event gets triggered and I make a call to
__doPostBack("UpdatePanel1", ""); so that i can update the updatepanel and rebind the checkboxlist inside it.
is it possible to do the rebind first, and then update the updatepanel? how do i do that? because now, the rebind happens on the second time i click on the checkbox.
I have a button that is inside of an updatepanel, I want it so that whenever the user clicks on the button it would update items in the updatepanel and after that it would activate the animationextender but I can't do that as of now because on the button I have OnClientClick="return false;".
I'm using a .js file to bind events to controls. I'm also using UpdatePanel to do async postbacks; however, when they postback,the controls lose the events that were initially bound to them. Is it possible to rebind the events in the Page_Load function by using the .js file?
I want to activate sub tab panel from main tab panel. The tab order is in following . So I want to Activate sub panel2 in tab container 2 from main panel 1 in tab container 1 using java script.
Tab container Main Panel1 Main Panel 2 Tab container 2 Sub panel1 Sub panel 2
I am using a javascript to zoom an image on my asp.net web page. I want to put 2 buttons on it like "Zoom" "Cancel Zoom" and accordingly activate/deactivate the javascript functionality. Right now I have a css class on which the javascript operated to produces the zoom effect. The image is like:
<a id="big" href="source of image" class"classforzoom"> <img id="small" src="some small image on page" /> </a>
For example, I have master page MyMasterPage.aspx and content page MyDefault.aspx. I have many UpdatePanels at MyMaterPage.aspx, and also I have many UpdatePanels at MyDefault.aspx.
[code]....
I want JavaScript functionClickMenu(this) at input button [id="ButtonMaster1" @ MyMasterPage.aspx] pass its value ["Menu-1"] into text box [id="TextBoxDefault1" @ MyDefault.aspx], and then performing update / doing post-back to server ONLY FOR UpdatePanelDefault1.
I am looking forward an example code for JavaScript functionClickMenu(this).
In a.aspx i have a textbox with ID="Textbox1".In b.aspx, i have a label with ID="Label1"I want when i open b.aspx, Label1.text = Textbox1.Text..but when i write in b.aspx Page_Load function, intellisense don't know Textbox1.
I've tried to wrap up my problem with a complete example below - the original problem is part of a jQuery plug-in that I'm writing to extend the behaviour of an ASP.NET ajax application I already have.
The aspx page below has one drop down list which is marked for auto post back. I've also bound a change event using jquery (which ultimately I will swap for a .live() event to maintain the binding after the update panel refresh.) The problem is, when the jQuery event is bound I see two ajax begin requests and page_loads fire but only one ddlTest_OnselectedIndexChanged event. One of the page loads is malformed too - the content-length states it's about 300 bytes long whilst the totalBytes is 0 and form data empty. This does not happen if I bind to the click event of a button.
So, in the above on the Master Page onload I am calling the javascript to get the screen resolution Then in my default page....which is being used first. My master page is loading and then my default page is loading. I have this is my Page Load event
[Code]....
However, what is happening is that I am getting the MessageBox.Show from the default page saying the screen is <null> by <null> and then I start getting the alert boxes from the javascript saying what the screen width and screen height is. In my page Load event of default. how can I wait until the java script in Master is done? Or is the a better place to put these events?
I have noticed that window.onunload event fires off AFTER page_load event which makes no sense.
This behaviour is creating an issue for me - in my unonload I clear the session, so if the Page_Load first BEFORE onunload, there are errors on the page displayed.
I would expect the javascript onunload to fire BEFORE Page_Load....is that the correct assumption?
TO CLARIFY: Let's assume I am on page test.aspx, then I click on the link that goes to the same page (say I click on a menu), what I observe is that Page_Load fires first, then onunload fires off. Makes no sense at all.
<asp:LinkButton CssClass="button" ID="btnApply" runat="server" OnClick="btnApply_Click()" OnClientClick="Apply1('btnApply')" > hi ihave this functin in .vb file Protected Sub btnApply_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnApply.Click end sub
I am reimplementing an ASP.NET application with a main page (Call it "MyMainPage") which contains a user control. (Call it "MyNavControl") Within that user control is a menu control provided by a third party. Items added to this third party control have an "Href" property that is passed a URL. The code to create a menu subitem, contained within the codebehind of the .ascx for MyNavControl, goes something like this:
ThirdParty.MenuItem subitem = new ThirdParty.MenuItem(); subitem.Href="MyMainPage.aspx?_page=PremiumCustomer&_title=Premium";
MyMainPage also contains a user control representing the bulk of the page body. Let's call that MainBodyControl.ascx. The Page_Load() for the main page sets up some session values which are used in the Page_Load() for MainBodyControl.When the menu item on the main page is clicked, the main page's Page_Load() will be passed the arguments specified in the menu item control's "Href" value. So:
Here's my question: I'm replacing the third party controls with standard ASP.NET controls, so the current "Href" property mechanism can no longer be used. What would be the best way, in some JavaScript assigned to a menu item's click event, to set a new value for "_page" or "_title" above.
I am trying to replace the JavaScript onclick event handler in ASP.NET that is added to a button control when using validation controls. This is what is output into the HTML from ASP.NET in this scenario:
I have looked pretty estensively, and unfortunately there doesn't seem to be a way to modify the function server side before it is injected into the page.
Since I am developing a control and desire it to be non-invasive and self contained, and I am interested in obtaining the validationGroup parameter of the WebForm_PostBackOptions object, it seems that the easiest solution would be to use JavaScript to replace the WebForm_DoPostBackWithOptions function name with my custom wrapper function and leave all of the rest of the parameter information intact - then I can extract the information I am interested in, call my custom functions, and then forward the call on to WebForm_DoPostBackWithOptions.
NOTE: I am using jQuery to build my custom function, so if there is an easier way to do this with jQuery it is an option I will consider.
Here is the code I tried to replace the onclick event handler (not working):
Using alert(), I verified that the text is being changed correctly, however whether or not I use the eval() function, the onclick handler doesn't seem to recognize it as JavaScript.
I thought of using a regular expression to get the validationGroup value, but this seems like it will be far more elegant and flexible if I can get it working...
Note: If there is a way for my control to interrogate the page it is on to find all of the buttons that will post back (regardless of what type of buttons they are) so I can retrieve the property server-side, this is also something I will consider.
In asp.net page, How can i call the javascript methods for form processing-submitting if the user browser supports javascript and use code behind events if the browser does not support javascript.I have the javascript code to send the form data to an ajax server page using jquery. Don't know how to invoke the needed one based on the browsers javascript availability
The script are put in the following and the block is in the .ascx page.
<script type="text/javascript"> </script>
However, the function UserControlNameInit() does not run when the page loads. It is showing in the page source. I can still call this function through FireBug console by manually typing the name of the function.
I did the same way with other user controls, and it works. Just 1-3 user controls are not working...
If I put ValidateGroupComplaint in a standalone js file (linked from the master page), then the alert line will always display nothing and always return false.
If I put ValidateGroupComplaint in a script block inside my web control, then it will work IF the web control is not in a UpdatePanel. If it is inside a UpdatePanel then it simply can't find the validator function (JS Error: object expected).
