We are getting a lot of hits from Googlebot and BingBot and it appears that none of these requests have an HttpContext.
I originally thought that every http request will get a context which obviously is not the case so I'm trying to understand how does an HttpContext gets constructed, is it part of the negotiation between client and server?
We're migrating an application to use IIS7 integrated mode. In library code that is designed to work either within the context of an HTTP request or not, we commonly have code like this:
if (HttpContext.Current != null &&
HttpContext.Current.Request != null) {
// do something with HttpContext.Current.Request
} else {
// do equivalent thing without HttpContext..
}
But in IIS7 integrated mode the check for HttpContext.Current.Request throws an exception whenever this code is called from Application_Start.
protected void Application_Start(object sender, EventArgs e)
{
SomeLibrary.DoSomethingWithHttpContextCurrentDetection();
}
Results in:
System.Web.HttpException: Request is not available in this context
How can I detect whether the request is really available without wrapping these calls in an exception handler and taking action based on whether an exception is generated or not.
Looking at HttpContext in Reflector I see it has an internal bool HideRequestResponse field but it's internal so I can only get to it with reflection and that's fragile. Is there a more official/approved way to determine if it's ok to call HttpContext.Request?
This blog post about the subject says not to use HttpContext, but how, in generic library code, can you determine if it's ok to use HttpContext?
http://mvolo.com/blogs/serverside/archive/2007/11/10/Integrated-mode-Request-is-not-available-in-this-context-in-Application_5F00_Start.aspx
I'm using the work-around mentioned there which is to use Application_BeginRequest and an initialized field to only initialize once as part of BeginRequest, but that has to be done in every calling application whereas I'd prefer to make the library code more robust and handle this situation regardless of where it's called from.
I'm converting a bunch of FOXPRO / FOXWEB apps to ASP.NET.
The underlying DB is still foxpro (for the moment).
I am passing a table to some VB.NET code that I want to have converted to a CSV file and sent back to the client for download. And it works! Sort of ... It works sometimes, but at other times, instead of asking me if I want to download the CSV file, it just spews the file to the browser window.
On the asp side, I am passing the response object, the table and the csv file name.
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After a user has finished registration, i want to show an info message and redirect the user to the site's main page after 5 seconds. I can do a delayed redirect easily:
[Code]....
How can i call this method only when the user was succesfully created?
I've tried creating checkboxes, literalcontrols and textboxes. I need to generate checkboxes dynamically, depending on how many types of <whatever> the user has put in. I know how to do this (I think), but the problem is the controls don't work as they should.
If I create server controls, then for some reason I can't change the value with javascript. If I create client controls, then something appears to happen with the id so the server can't fetch the value (it doesn't recognize the id, allthough it's there in the html)
I can't use a regular checkbox with autopostback because there is to much happening at page load. On other pages on the site, this works, but on those pages the controls are not created dynamically.
I have been experimenting with code that will clear all of the cookies in an HttpContext.Response.Initially, I used this:
DateTime cookieExpires = DateTime.Now.AddDays(-1);
for (int i = 0; i < HttpContext.Request.Cookies.Count; i++)
{
HttpContext.Response.Cookies.Add(
new HttpCookie(HttpContext.Request.Cookies[i].Name, null) { Expires = cookieExpires });
}
this will error with an OutOfMemoryException because the for loop never exits - each time you add a cookie to the Response, it also gets added to the `Request.
i'm using an example in which i can fake the session.It's for use in a unittest of a mvc controller.In the test i create a controller and then i do this:
FakeHttpContext httpctx = new FakeHttpContext(null,null,null,null,mSessionItems );
ControllerContext ctx2 = new ControllerContext(httpctx,new RouteData(), target);
here mSessionItems is my session and target is my instance of a controller,and indeed, when i'm in a controller reading this.ControllerContext.HttpContext.Session, i have a session, great!but.... i also read the session outside the controller, and there i use HttpContext.Current.Session, and that is null (or actualy, the HttpContext.Current is null).
In a project when user click a button, some data is gotten and written to an excel instance by interop library.
Now, I want that: When excel instance get all data, a save as dialog box muste be open and save this excel instance to user specified path.
Is there a way to do it?
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I have been using LINQ to SQL for quite a while (about two years). Every thing was fine until now. As usual, I created LINQ to SQL classes and built the project, then created an aspx page. However, I cannot see the DataClassesDataContext in the code behind file. It is not listed in the intellisense list.
View 5 RepliesFor some reason I have noticed that at run time when looking at my source of my ASP.NET page there are tags being created.
<input type="hidden" name="_VIEWSTATE" id="_viewstate" value="..lots of text.." />
and
<input type="hidden" name="_EVENTVALIDATION" id="_EVENTVALIDATION" value="..lots of text.." />
Why is this and what is it for?
How can I make sure that these are not created?
onething is not clear to me that in asp.net 1.1 there was asp.net project type but from 2.0 there is no asp.net project type option rather
there is option called website. in website type project no solution is created and no link is created with IIS.
why microsoft design in this way from 2.0. i think there must be soldin reason & advantage behind it.
I'm creating a static helper class for web services I'm writing. I'm tapping into the API of Telligent and therefore creating these Telligent "service" objects that allow me to do things with the platform. For example, I'm creating a MembershipSerice object in my helper class so I can do membership stuff with the same object. In my helper class I have a property with a getter that creates a new one of these objects:
private static MembershipService _MembershipService {
get return new MembershipService(path, usr, pwd);
[code]...
My web page has two ways of displaying a particular content. 1. When the page is loaded, the items ( images with anchor tag) are generated using ASP Repeater. 2. When user perform some Ajax action, the images are returned as JSON and I use jQuery for creating the a & img tags.In both these methods, the anchor tags with images are displayed with width 60px. There is no CSS class applied. But strangely the display is not consistent. Here is the both displays:I wonder why this difference occur. I check this with all browsers ( IE,FF& chrome) and all behave the same. Here is my jQuery code:
$('<a>').attr({ href: '/Detail.aspx?id=' + result.it[i].pid, title: result.it[i].nam }) .html("<img src='" + result.it[i].url + "' title='" + result.it[i].nam + "' alt='" + result.it[i].nam + "' width='60px' />").appendTo("#SummaryDiv");
Any idea why this behaviour occurs? I also checked the css applied to these elements in chrome and FF.. they seems to have all the same CSS attributes.
I am new in ASP.Net and C#.
I have used HttpContext.Current.Response.Redirect in a class file.
Is it right? or if any problem occur by using this?
I'm wondering how HttpContext.Current gets assigned a unique instance for every request considering it's a static object?
View 2 RepliesI have an ASP.NET site and I've been doing some work refactoring code to try to remove some long running processes (in the order of an hour) from the actual http Request by creating a BackgroundWorker and sending the work off to that to process. This was running fine on cutdown tests but when I applied the logic to the real code I found problems accessing Session variables from the code running in the Background Worker. It seems that the HttpContext object that was passed has a null session and if I ask for HttpContext.Current I get null back.
I'm assuming that this is because they are in a different thread and that the session and HttpContext.Current are both reliant on being in the same thread. Is there any way I can get access to the Session from the background worker or am I stuck with finding all the variables I need from session and putting them in an usable data structure and then putting them back in session (if appropriate) afterwards? It obviously complicates the refactor massively if I need to do this so I'd rather not.how I might do this other than BackgroundWorker processes
I'm trying to create a SessionManager class which I can use to manage sessions in my MVC applications. For that I'm thinking the best way of doing so is by creating a wrapper class for HttpContext which would then allow me to access HttpContext.Current.Session.
To be honest, I'm not really sure about the whole thing, I just feel it's the logical way of doing so. I also want to create an ISessionManager and ISession interfaces, and then implement them according to my application's needs. For my current project, and for now, I need a InProc session management, but I might need to store session data in MSSQL Server when we decide to expand and use a web farm or a garden. That's why I'm trying to build a sort of an extensible framework right from the start.
Final note, I will be using Microsoft Unity to inject the concrete SessionManager of choice. I believe that's a good way to maintain a certain level of abstraction.
I'm digging around with HttpContext and the OnInit event for a custom control, after realizing that a few checks are not responding in the desired manner.
Within the current context's items collection, I store an object (serialized) that I would like to interrogate once on every post back. The first time the control is rendered, will the items[] be null, it then gets populated somewhere down the line and the user clicks a button to post back data.
Now, within the button submit event, I set the items[key] to null to ensure that on the post back I don't have anything stored, but it always contains a value.
I'm assuming that the OnInit handler has a reference to the previous state, thus 'falsely' assuming that the items[] should contain a value. Is this something to do with the way OnInit works, or am I missing the bigger picture?
What is httpContext.Response.SubStatusCode for? this value is part of the IIS integration mode pipeline.
View 2 RepliesI spawn a thread on Application_Start and would like to log exceptions. There is not Context/HttpContext/HttpContext.Current, so how might i get it to log?ATM it does not catch any exception in my threads and if i write ErrorSignal.FromCurrentContext().Raise(ex); i get an error about context cannot be null.Maybe i can create a dummy HttpContext but somehow i dont think that will work well.-edit- i tried ErrorSignal.Get(new HttpApplication()).Raise(ex); and it doesnt seem to pick up that exception.
View 2 RepliesWhat's the correct way to get the controller name and action from an httpContext object? I can see the values in the debug, but I don't seem to be able to get to them in the object code?
View 13 RepliesI have declared a form input in my ASP.NET ascx file:
<input type="hidden" id="hidServiceType" name="hidServiceType" value="somevalue" />
And in the web service / web method, I am trying to get the value of this
HttpContext postedContext = HttpContext.Current;
serviceType = postedContext.Request.Form["hidServiceType"];
I can dig down into postedContext.Request.Form and see 2 keys one being "hidServiceType" but "serviceType" variable = "";
I need to fake HttpContext.Current.Application table to access it from my unit tests.I need to store my data somewhere. I thought that I can just pass instance of NameValueCollectionBase but as I descover this base type has no indexer so it's too complicated to use. So what about faking this part of HttpContext? Is it possible? How can I make it? Will be NUnit.
View 2 RepliesI'm considering using the HttpContext.Items HashTable to store reuseable user data (per user) instead of in the Session,
I'm hoping that this data is stored on the client and not on the server, but I did not see anywhere that this is the case...
Also, is there any drawback or loss of data that can happen when using web farm or clustered web servers ?
Is it safe to always assume that HttpContext.Current will be non-null in Application_PreRequestHandlerExecute?
EDIT: Assuming ASP.NET webforms (not MVC).