Debugging Javascript Code That Comes As Part Of Ajax Response
Jan 17, 2011
So in my website, I use jquery to fetch data through ajax. AS part of the ajax response, some of the javascript code comes as well which is executed. The problem is how to debug this javascript in firebug or other tools. This is my experience so far: putting debugger; doesn't work For some javascript, can't set the breakpoint as that script is not yet loaded. even if this new javascript calls some other function thats already loaded (i.e. i can see it in firebug and set a breakpoint), that breakpoint on that function is still not triggered
However, the javascript does executes normally and even things like console.log works but cant seem to debug it.
I have an ASCX component that has a lot of javascript declared in a script tag in the ascx itself. I can set breakpoints, and the debugger stops as it should, but the text that is highlighted in the debugger as the "current line" is nowhere near the actual javascript (it is much higher in the rendered file than it should be). I can "wing it" for one or two lines with the real code side-by-side with the "false" line of execution, but I lose all the hover abilities and everything else that makes javascript debugging useful.
I have tried putting the script at the top of my ascx file, but to no avail. I've tried not setting a breakpoint until the entire page is rendered, so that I have to scroll all the way to where the actual lines of code are, and the debugger still stops somewhere way above it.
I'm trying to debug some problems I have with Javascript code in the Ajax Control Toolkit. I tried setting debug=true in Web.config and adding ScriptMode=Debug in the script manager; but when the error occurs I still get the compressed JS files. Is there any way to get the uncompressed JS files to the browser? Does anyone have a simple self contained example of this working?
I have an MVC controller that returns a file via the Response.TransmitFile
I works splendidly with small files. I noticed with larger files that after the client app receives the file, everything in the file from offset 10000 (hex) to the end of the file is zeroes. The resulting file is the correct length, its just that everything from 1000 on is zeroed out. BTW, WriteFile does the same exact thing.
The problem is when I send AJAX (XmlHttpRequest) request from other page to this page, that response does not get cached on any browser but IE. (On IE, it gets cached even if I don't specify). How do I make it cache?
i'm just getting started with asp.net and ajax. My question is : is it possible to make an ajax request and simulate the server response in the code behind. in other words can the request be sent to the code behind of the same page? if it's possible haw can i perform this ?
I did a break points on the Tools.JS , but while debugging I didn't found my JS in Script Documents (Run Time mode) , and i remarked the exclamation message on my BP saying that this break point willn't be take in mind cause the JS document isn't charged.
My question is : Is there another way to load a JS to be available in the debugging mode? and how could i debug my JS in this case ?
I declared global variable in js file which is filled after jquery.ajax call. Everything works fine when I put breakpoint to see if the global variable has its value with Firebug, I can see it, no problem. But when I remove breakpoint and try again, error with variable 'undefined' shows.I also tried to put result into hidden field and then retreive its value later. Same error.
I don't know what is happening? With breakpoint set in Firebug it works fine, without it, shows 'undefined' error.
I have trawled the internet - to no avail. Woe is me.I have a .Net website running under a .Net framework 4.0 App Pool.The website references various assemblies that have been compiled for .Net 3.5.I have ensured that identical versions of the dll's and pdb's are in the bin folder of the the 3.5 code that I am trying to debug, and the reference path of the 4.0 web site. I.e. the code that I am trying to debug matched the assemblies that are loaded into the app pool's process.
When I attach the debugger using VS2008 with the solution for the .Net 3.5 code open, the breakpoints that I have set are marked as invalid (i.e. marked with an exclamation mark). When I hit refresh on a browser page that invokes the code that I am trying to debug, VS2008 raises an unmanaged code exception.I have researched In-Process Side-by-Side code execution, which is what is occurring in this instance, and is working very well; but for the life of me I cannot find any information on debugging in this scenario.It is not an option to convert the .Net 3.5 projects to use .Net 4.0, nor is it possible to convert them to use VS2010 and leave them targeting .Net framework 3.5
I am converting an old asp project to a new .NET project. Now, all vb code are inside aspx files, and we are on the process of moving all vb script from aspx files to .vb files. My problem is, I can't debug the vb script inside most of the aspx files. All my friends don't have this problem. I think the problem is with vb text editor.
I am using Visual Studio 2008.
Is there anyway, I can make visual studio understand that aspx files have vb script inside them.
have an update panel that encapsulates a radiobuttonlist which does not update, in certain browsers, without manual page refresh. i am able to make this work using <asp:postbacktrigger controlid="aControl"/>, but only want to refresh the page if browser is Firefox or Flock (two browsers having the issue). i am not sure how to do this, but am open to either javascript or code behind. any suggestions? [code]...
Basically i have two asp.net buttons on my asp.net page as follow:
[Code]....
and this is the code behand fo btnSave onclick event:
[Code]....
and this is the code behand of btnPreviwe onclick event:
[Code]....
as you can see, when the btnSave is clicked, it is programmatically clikced the btnPrevew first, and btnPreview registers and fires the required JavaScript. But actually once the btnSave clicked, it does go to the btnPreview_OnClick event, but for some unknow reasons, the javascript in btnPreview_OnClick doesnt work, however, when i just put cstext2.Append("alert('hi')" instead of cstext2.Append("'SaveSignature()'", the javascript does executed, and also if i modifed the asp.net code for btnPreview to this, it works too.
I'm fairly inexperienced with JavaScript and jQuery,but I need both for the ASP.Net website I'm working on. I am slowly figuring it out, but I've been relying heavily on StackOverFlow.Does anyone know of any tool (preferably free) that makes debugging JavaScript and jQuery easier?I've been using Firebug which has been helpful,but I guess I'm just spoiled by Visual Studio's debugger and intellisense.Is there anything like that for JavaScript and jQuery?It would sure make my life easier if there were?
but there is no component which wraps this code like Repeater, DataList or something like that. How can set the set a DataItem to this code to show the values of an object of a class.
I know you can copy a Website intact to the server and have it run normally (security and compilation time aside). What about the projects that are in the solution? [whose dll's are copied to the bin when built]. Is there a way to copy the projects' code files to the server as well?
My goal is to be able to debug [by modifying code in the project if needed] directly on the server without having to install an IDE [or keep building on dev machine and copying over dlls]. I can debug/modify the website files, but not the projects.
I am working on an ASP.NET project. When I am debugging, I often want to switch back from my browser to Visual Studio (2008) and edit some code. Visual Studio then won't let me edit the code, unless I explicitly quit debugging first.
Is there any way to configure Visual Studio such that is automatically stops debugging and allow me to edit the code, or do I have to stop it manually each and every time?
Disabling Edit and Continue does allow me to edit the code, but this does not force VS to stop debugging...
I have been using visual studio 2005 Prof. Edition to debug stored procedure using this tool. However I cannot use the comment field as it is grayed out.
Is it possible to comment code in transact sql using visual studio 2005.
I need to access a custom property of web part(that wraps an ASP.NET user control) from JavaScript. Is it possible ? I need that property value so that I could pass that to an AJAX web service then.
I am using the javascript alert in code behind but after click the Button i trigers the javascript,it's working fine with the update panel but if i using update panel now action work on my program
I have and web application and there are two dropdowns. I want to use Javascipt to populate the the second dropdown on basis of the selection of the first dropdown.
A have a web page that does an AJAX callback. When the CallBack event is handled, my ASP.NET code generates some JavaScript that is then returned to the browser. The idea is that this JavaScript will then immediately be executed. The reality is that it isn't....
Here is an example of my server code that handles the callback (the JavaScript has been simplified to a single alert):
[Code]....
I've tried using some of the browser DevTools in IE, Firefox and Chrome, but I can't get them to spot changes after an Ajax event...]
