C# - Determine If A JavaScript File Is Already Included Via User Control?
Jan 20, 2010
I'm building several user controls (ASCX) for my website and several of them are very similar in what they do. (As a side note, I must create unique UC's even if they're similar because I'm creating widgets for the new Telligent Community themeing system). For example, two of them are different but use the same front-end code to create a 2 or 3 tab panel where you can click a tab and it changes the data below. I have a single JS file to handle these tabs and the animations. I'm currently dynamically adding my JS file reference to the <head> from the user controls' code via:
Literal jsFile = new Literal();
jsFile.Text = string.Format("<script src="{0}"></script>", "/community/themes/test/js/tabbedCallout.js");
Page.Header.Controls.Add(jsFile);
If I have both of these controls on a page though, both will add this JS file reference. How can I do a check to see if it is already added from another control?
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Similar Messages:
Feb 17, 2011
So the problem is the following :
i do have own user control. which has some javascript file in script tag included like this
<script type="text/javascript" src="../somefile.js" ></script>
or some javascript code directly on the ascx page. everything works if i place this control somewhere in aspx markup. but if i add this control to the page dynamically to some UpdatePanel place holder on postback (this is logic i can not alter), control renders itself and then i get js error message, which says that functions which are placed in somefile.js are not defined/are null. Why is this happening ? Is there anyway to force js including in this case.
the code amount is huge and i was not able to provide a simplified example with the same error,.
The script is included but somehow the functions are not defined. I'm novice to js, so is it possible that just the script is included but not executed, so the functions are not declared ???
The interesting is that if on some page my custom control is declared in aspx.
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Jul 27, 2010
I am using mixed validation i.e. dot net controls validation and javascript validation. Javascript(js) function is 'hpVali()'. It is working when coding javascript within aspx page's head section. but when i moved it in a js file. It stoped working.
I have used the script to register/add js file in aspx.cs file as:
[Code]....
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Apr 30, 2010
how can i add a javascript file to the page head from a user control?
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Mar 23, 2010
I am developing a user control (ascx) in ASP.NET which uses javascript for manipulating controls. Currently the javascript code is inlined and uses <%= somecontrol.ClientID %> to get the control it needs.
I want to put the javascript file in external file but from external file I cannot use the above syntax for retrieving controls. I have read about possible solutions in this and this answers but the problem is that the user control can be placed multiple times on page. This means that the Controls array (mentioned in the answers) will be rendered several times with different items. As a result the script will not be able to retrieve the id it needs. If I put <%= ClientId %> in the name of array that holds items then I will have the same problem as I am trying to solve.
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Apr 4, 2010
I am tring to send form values to a page from a user control. I included the user control in a master page.When i use page.previouspage it can not get value. is there any way to send form data to a page from a user control included in a master page?
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Mar 7, 2011
I have set up in javascript:
var onBeforeUnloadFired = false;
window.onbeforeunload = function (sender, args)
{
if(window.event){
if(!onBeforeUnloadFired) {
onBeforeUnloadFired = true;
window.event.returnValue = 'You will lose any unsaved changes!'; //IE
}
}
else {
return 'You will lose any unsaved changes!'; //FX
}
windows.setTimeout("ResetOnBeforeUnloadFired()", 1000);
}
function ResetOnBeforeUnloadFired() {
//Need this variable to prevent IE firing twice.
onBeforeUnloadFired = false;
}
I'm trying to achieve an edit screen where the user is warned before navigating away. It works fine except I get the pop up for normal post backs of button clicks. I'm hoping to avoid this so I'm figuring if I could determine which button was pressed it would work. Does anybody know how to determine which button was pressed in the indows.onbeforeunload? Alternatively anyone know a better approach to what I'm trying to achieve?
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Oct 26, 2010
I have a user control which I call like this:
<MyNamespace:MyControl runAt="server" ID="foo" /> Is there any way I can determine the ID parameter at run-time and pass it in?
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Nov 30, 2010
<asp:HyperLink
ID="hyper1"
runat="server"
NavigateUrl='<%#string.Format("~/PLayer.aspx?ID={0}&Type={1}",Eval("arrange_by_id"),Eval("value"))%>'><%# Eval("value")%></asp:HyperLink>
I've implemented this string format in my NavigateUrl to pass a dynamic querystring depending on the clicked item!
but you see the first part in the string format where it says "~/PLayer.aspx" i want the user control to automatically change this part according to where it's placed!
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Jun 17, 2013
I have a tab control on my page and on click of tab user control is loaded dynamically.I need to load the javascript file of that user control dynamically. I don't want to add the reference of my js file on parent page.so in my .ascx page load event i added:
System.Web.UI.HtmlControls.HtmlGenericControl js = new System.Web.UI.HtmlControls.HtmlGenericControl("script");
js.Attributes["type"] = "text/javascript";
js.Attributes["src"] = "../../js/DatesJavaScript.js";
Page.Header.Controls.Add(js);
but it is not working.
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Dec 21, 2010
I have a webpage that allows a user to download a specified file. When the file is ready to be fully downloaded (i.e I call the HttpResponse.End or HTTPRepone.Flush) the user is presented with a File Download dialogue.
Is there any way to determine what option the user has selected?
Have they Opened, Saved or Cancelled the File Download once the Flush or End has been sent?
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Sep 16, 2010
Does anyone know a simple way to determine if a user control is contained in an update panel that was triggered for async postback?
At the moment, the only pseudo logic for this I can think of is?
'Loop through the update panel controls on the page and find the one that is involved in the postback (isInPartialRendering)
'Try to find the user control as a child of the update panel
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Feb 1, 2010
We are working on an ASP.NET CMS project using jQuery as the basis for our client side scripting. The jquery-1.2.6.js file is the only script file that is always included. Other script files are currently included depending on what components the CMS editor is using on a page or page template.A lot of the script combiners produce a static script. If we took that approach we would have to add all possible script files in just in case they were needed. We are not currently using any of the ASP.NET Ajax extensions so have not looked at what that may give us.
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Mar 10, 2011
I took over a rather large C# .NET 2.0 legacy web application from a colleague who is no longer available. This web application consists out of multiple projects in one solution. And I ran into a problem that I simply do not understand and hopefully somebody here will. The application has multiple .sitemap files included in a sitemap subfolder. So far so good. But I found one .sitemap file that was floating around in the root of the web project and is not used anywhere in the application (it's not included in the web.config).
I excluded this file. The web application runs fine without it. All menu's load correctly. Until I hit a method that uses recursion to look for certain controls (NOT the sitemap!). This method runs down through all controls from a given point and then crashes on the fact that the XMLSitemapProvider is missing this one file. This method is called many times without issues, but when the user logs out it somehow runs through a hierachical path of controls that eventually end up at the missing .sitemap file. The file also needs to be at this exact location in the root. Moving it somewhere else will cause the same crash. The file web.sitemap required by XmlSiteMapProvider does not exist.
I have searched for this filename and all ".sitemap" files but can not find it anywhere in the solution. 0 results found. I've ran past all the code leading up to the crash and it seems arbitrary (it has nothing to do with the sitemaps). The crash just happens because it hits the XmlSiteMapProvider looking for another control when it's going through all controls. In short, I can find no references what so ever to this file!
Since this web application is huge I can not manually go past every section of code. There is hundreds of thousands of lines of code. Does anybody know any other way then through the web.config to include a sitemap or how a sitemap file could be registered and where I should look? Final note: this application used localization. The sitemap's are localized and I found resources for this one sitemap. I hoped excluding those would solve the problem. Unfortunately it didn't.
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Jul 13, 2010
Now the weird thing is I have a user control UserControl1 in which I put some JavaScrdipt logic there, and I have another user control UserControl2 and I registered both in the page called Page1.aspx.I would like to call the JavaScript function resided in UserControl1 from UserControl2, however, I got an error saying the function is not defined. I think both user controls are loaded before I use them then I think the JavaScript function can been seen anyway in that page.
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May 17, 2010
Visual Studio (SP1) runs fine until I try and view .aspx source files with the lines
<style type="text/css">
</stlye>
anywhere in them, upon which it freezes (i.e is totally unresponsive) and I have to use the task manager to shut it down.
I have read a lot of questions about Visual Studio 2008 crashing on viewing some source files. However, I still can't fix this problem.
I have systematically deleted and re-included all other code and it comes down to these two lines, which is very confusing. Sometimes it happens as soon as the lines are added, sometimes it doesn't freeze until I build the solution with any of the problem pages open. I can add external style sheets, and it only started recently.
I had Resharper 4.5 installed and have since uninstalled it, and do not have anything else installed.
Also, it happens to other people with the same source code, and re-installing Visual Studio does not fix the problem. So I have several questions:
Is there any way I can find out what's happening? I don't understand how the code (the css tag itself) could crash Visual Studio, and am thinking that this is unlikely and it must be something else within my solution, would this be a safe assumption? Could this have anything to do with installing Office 2010?
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Apr 12, 2010
I think I summed up the question in the title. Here is some further elaboration...I have a web user control that is used in multiple places, sometimes more than once on a given page.The web user control has a specific set of JavaScript functions (mostly jQuery code) that are containted within *.js files and automatically inserted into page headers.However, when I want to use the control more than once on a page, the *.js files are included 'n' number of times and, rightly so, the browser gets confused as to which control it's meant to be executing which function on.What do I need to do in order to resolve this problem? I've been staring at this all day and I'm at a loss.
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Sep 22, 2010
I have the function put here like below:
$(document).ready(function () {
UserControlNameInit();
});
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...
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Apr 16, 2012
I hava a page default.aspx having master page abc.aspx and web user control login.ascx i want to call perform simple alert function on login button but not on client click event. For e.g
Protected Sub BtnMyIpLogin_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnMyIpLig.Click
'Some Validation part here for user login
'then my if condition like
If flag_alert = 0 Then Page.ClientScript.RegisterStartupScript(Me.GetType(), "btnflag", "alert('Your Download / View Limit Exceed More Than 90%');", True) End If
but it is not working.........................
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Mar 22, 2011
is it possible to get the ID assigned to User Control from the control using javascript or jquery.
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Jul 22, 2010
when i am trying to use a repeater to display data in a wizard control, everything seems worked as expected before i change the value of wizard's DisplaySideBar, here is my demo code:Test.aspx:
[Code]....
Test.aspx.cs:
[Code]....
guys who intrest on this you can copy this code and test it on your pc, when we click the link button in repeater's item will do nothing at the first time but it will work when we click it again.i have debug this and found that when the page is not in post back, the linkbutton's id will be "MainWizard_rpMain_ctl01 _lbEdit" in prerender method but after render it will change to "MainWizard_rpMain_ctl04 _lbEdit", but when page have been post back, the clientid will be correct as "MainWizard_rpMain_ctl01_lbEdit" and then event can be fired correctly.i thought this is a bug of .net framework, when i set the value of wizard's DisplaySideBar, it will ask to re-create controls but repeater haven't clean the item's count and then recreate item will use wrong item index, i hope this message can be post to .net framework team and they can find out what's the matter on it.
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Mar 14, 2010
In ASP.NET, when you give a tag an ID it generates a unique HTML id for the element based on the control hierachy, ie.
<asp:Panel ID="test" runat="server">
...
</asp:Panel>
<!-- Becomes... -->
<div id="plc_lt_zoneContent_PagePlaceholder_PagePlaceholder_lt_test_test">
...
</div>
Is there some way of determining the generated id in the codebehind file? I need to generate some Javascript that uses the id.
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Jan 25, 2010
So I've been handed an older website, and been asked to make some modifications. It's been made with ASP, and I'm not really familiar with it. [URL] I've been asked to get rid of that awful scrolling. By looking at the page source, I determined that the scrolling is done using some inline Javascript.
<script type="text/javascript">
function getElementPosition(theElement){
var posX = 0;
var posY = 0;
while(theElement != null){
posX += theElement.offsetLeft;
posY += theElement.offsetTop;
theElement = theElement.offsetParent;
}
return {x:posX, y:posY};
}
var offsetY = 0;
window.onload = function(){............................
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Jul 2, 2010
How can I determine where a user came from when they land on my webpage.Did they come from a google link?Did they user a favorites link?Did they type in the url?
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Feb 20, 2010
I have an application which use some javascript functions,As all javascripts include in Masterpage, most of them which comes withpage are not necessary, and some of those are repeated ( cause used in some different JS file. )So I want to check if there is a way to determine duplicate functions and remove them ?
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