Controller Method Not Always Called From $.getJSON Request?
Mar 9, 2010
I have a controller method that returns a jSON object and in one calling situation, it works and in another calling situation, it does not work. When the URL in my browser is this:
http://localhost:65247/Client -- it works.
But, when my url looks like this:
http://localhost:65247/Client/UserAdmin?id=6 -- it DOES NOT work
In a nutshell, clients have users. From within the client, I wish to work on a specific user (this is the UserAdmin view). In this case, the client id is 6. From within the UserAdmin view that was launched with Id=6, I then wish to select a user from a dropdown. The idea was to use javascript and $.getJSON to fetch data for the specific user so as not to have to refresh the entire page. I use this approach in other parts of the app. The only difference I can see is with the URL in the browser. It would appear the presence of parameters via the '?' is futzing things up a bit.
I am trying to make my ASP.NET MVC 2 application working from a test server.
Since I am using IIS 6 in my test server, I have to define in the Global.asax.cs file:
routes.MapRoute( "Default", // Route name ===> "{controller}.aspx/{action}/{id}", // URL with parameters new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults );
This complicates the correct definition of the URL in my getJson() calls for my site production version.
When running my site from the test server, I found using Fiddler that the URL reguested by the browser
for getJson() calls is:
/Controller.aspx/Controller Method
which is correct, but probably, not the complete necessary path for getJson() to work.
I think that this is the reason for getJson() calls to give "Page Not Found(404)" in Fiddler and a syntax error in FireBug and to be skipped completely when trying to execute. Of my understanding the complete path should be:
I am having trouble finding any information on this but basically in MVC how do I set up a controller method do read a GET request? For example I have the following url,
I am creating an Asp.net web site which will support dynamic data. When I am creating a dynamic web site from Scratch (from template in VS) all is working fine. But when I am trying to add dynamic entity (.edmx) file and running the application I am getting following error
"The method 'Skip' is only supported for sorted input in LINQ to Entities. The method 'OrderBy' must be called before the method 'Skip'. "
How can i transfer control to a controller's method from a controller's method..I am having two Controllers Home and User.. After username and password are verified inHome Controllers method , i want to show the User Controllers index page , so i have to callindex method of Home controller..How can i do it.
I am new to MVC2 and have hit a wall. When I use an action link to jump back to a previous page that I have already been on, my controller is not called but the page is rendered correctly. Is this some sort of caching that I am not aware of? This also happens with a RedirectToAction call from another Controller. rfm is the Model...
I have a controller method "SaveFile" that attempts to download a binary stream to client's PC using the FileContentResult. If I make the call as a post from the controller corresponding view everything works OK. I want to call the same controller method "SaveFile" from a jquery function via an .ajax call, when I do the function returns an error and the responseText is the contents of the file to be written. What would I have to do to get the same behavior from a jQuery function as if the MVC framework handled the call via the submit button? Or an alternate solution would be to determine how can I catch the browser's download dialog close event.
I'm calling an action from another controller using this code
[Code]....
But inside "ApproveOperation" action, I needed the Session variables. It seems when I called it from another controller (not the owning controller), the Session variables can not be accessed (null value).How can I get the same Session variables just like it was called from the owning controller?
I'm using a simple base class for my controller that sets a piece of ViewData and makes use of the HttpContext. My understanding is that I need to put this code in Initialize() or OnActionExecuting(). I tried both, but believe Initialize() is what I want.
This works when running the app in VS just fine.
I wrote a unit test that calls the action and checks the ViewData for the expected value. When unit testing, neither method is called.
I have a .NET 3.5 web application that uses SQL Server for its session state store. To improve scalability I wrote a class that implements IPartitionResolver that figures out which instance of SQL Server to use for a users session. All of this works great and just as expected.
However, when I was debugging one day I set a breakpoint at the bottom of the ResolvePartition method to make sure the correct connection string was being returned. To my surprise this breakpoint was hit many (~5-10) times per request! The same is true about breakpoints in the IPartitionResolver.Initialize method.
Does anyone know why this is? It seems to me that you would only need to call these methods once per request. It's not like the users session is going to move to a different instance of SQL Server mid request.
I have various web pages that need to build up a URL to display or place it in an emitted email message. The code I inherited had this value for the name of the webserver in a Public Const in a Public Class called FixedConstants. For example:
Public Const cdServerName As String = "WEBSERVERNAME"
Trying to improve on this, I wrote this:
Public Class UIFunction Public Shared myhttpcontext As HttpContext Public Shared Function cdWebServer() As String Dim s As New StringBuilder("http://") Dim h As String h = String.Empty Try h = Current.Request.ServerVariables("REMOTE_HOST").ToString() Catch ex As Exception Dim m As String m = ex.Message.ToString() 'Ignore this should-not-occur thingy End Try If h = String.Empty Then h = "SomeWebServer" End If s.Append(h) s.Append("/") Return s.ToString() End Function
I've tried different things while debugging such as HttpContext.Current.Request.UserHostName and I always get an empty string which pumps out my default string "SomeWebServer". I know Request.UserHostName or Request.ServerVariables("REMOTE_HOST") works when invoked from a page but why does this return empty when invoked from a called method of a class file (i.e. UIFunction.vb)?
I am having a problem with getting a listbox to update after the add method is called. I am using an AsyncFileUpload control and as part of the AsyncFileUpload1_UploadedComplete I am creating a listItem and then adding that to the listbox. The item will not appear in the listbox. I have tried putting the listbox in an update panel and then calling the Update method on the panel from within the AsyncFileUpload1_UploadedComplete procedure and that too fails to update the listbox. I can call the Update method on the panel from a separate procedure and still the listbox will not update with the item added in the AsyncFileUpload1_UploadedComplete method.
I can't understand why the method LoadViewState() is not called after the postback in my code below.After label1 cahnges its text the "__VIEWSTATE" hidden field is modified, but LoadViewState() is not called.
I'm overriding the Controller.Initialize method to set some stuff before each ActionResult is executed, however I'm finding that the method is being called multiple times for each request (anywhere between 2 - 10 times). I'm running in Cassini.
My hunch is that it is running for all static files (images, css etc) as well as the requested action - although I may be wrong? I thought maybe something was wrong in my web.config but it all looks right to me.
In one view (view1) there is a text box and a button beside it. i click on that button, i am popping another view (Create view) as a seperate window. in create view i am entering some values and creating a record in db. out of these values one value i have to send back to "View1". how can i send this value? i am opening view2 from view1 like
View2 contains some fields like Name,Email etc... and I click "Create" to call HTTPPOST. there i add the values to db including a generated guid. i want to send this ID to view1.
I'm rewriting a Web Forms application as an exercise to learn some MVC skills.I have a number of LinkButtons on the original application which postback and raise a serverside event that rebinds data to a datagrid.
<%= Html.ActionLink("CurrentYr", "Index", 0)%> <%= Html.ActionLink("1", "Index", 1)%> and
public ActionResult Index() { return View(MietController.GetMietByYearOffset(0);
[code]... As the ActionLink renders an tag it doesn't postback so my overloaded Index() method isn't called. What are my options for doing this in MVC?
I want to use a function in the code file of ASP.NET such that everytime the function is called, its value increases by 1.I thought of a way but it didn't fully work out. I created a class for this and used a static variable in that but the lifetime of static variable in asp.net is till the time the app does not close.
How code a time delay before the next method is called? I have the following but I don't think it's waiting 10 seconds before calling CallMethod(). Thread.Sleep(10000); CallMethod();
As we know when IIS receives the first request for a particular Asp.net application resource, IIS creates an instance of a HttpApplication (defined in global.asax codebehind).When this new instance is created it's initialization happens that also checks all configured HTTP modules.All modules are then instantiated and put in the application's Modules collection (of type HttpModuleCollection)modules are looped through and their Init() method is called (when they register for request events)
As far as I understand it the above scenario happens when a web application is started/initialized (hence application start event).What happens with modules?
Are they (re)instatiated on each request or reused from the Modules property on each consecutive request while the web application is alive? As I understand IIS and Asp.net they are reused through the whole life of a web application.
If they are reused, can we assume that their Init() method is actually a pseudo event handler for application start event? The thing is we can't attach to application level events within http modules. But if they are being reused we could use Init() as application start event and do whatever we'd put in global.asax instead.
Question,Can we assume that module's Init() method is called only on application start event? Could we use this assumption to i.e. register routes for applications whose global.asax codebehind we can't change? web.config is usually accessible and we can change it the way we want.Would this actually work?
Additional info,We can check HttpApplication code and check its InitModulesCommon() method. This one actually calls Init() of each registered HTTP module. What is more interesting is that this method is only used by InitIntegratedModules() and InitModules() methods. Which are both used only in HttpApplication.InitInternal() method. This is the basis of my assumptions, but I would like to know whether someone has abused IHttpModule.Init() for application start event.
