In .NET is it possible to get the HttpContext of the current page from within an external class?
So, for example in my page test1.aspx codebehind I've got:
Dim blah As New FeedWriter()
blah.Run()
But inside FeedWriter.vb, can I get the HttpContext of test1.aspx? Or would I have to pass it in to Run()? (I'm unwilling to do the latter because FeedWriter implements an interface which will need to be re-written if it's to take arguments)
I have 2 separate code-block asp.Net expressions in an aspx markup, with an html content between (span element in the example below). In the first code-block, there is "i" as an increment variable for the for loop.Then the code-block is cut with an html content.And another code-block expression is opened but as I see I can reach the "i" variable which was declared in the previous code-block.
So, how asp.net handles -compiles- the pieces of code-block experrions declared in the mark up? Does it check the semi-colons and generates some anonymous methods which will end up with many calls to Response.Write in the last place? <p> <%for (int i = 0; i < 30; i++) {
I know how to impersonate a user for the entire site but how best to impersonate for a block of code; WindowsImpersonationContext or NetworkCredential?
Basically what i am trying to do is display a list of categories. And if the admin is logged in i want to show some buttons next to each category. For example a button to delete it. The problem is that i dont know how to pass a parameter to the function that does the action.Like i specify that on button click the function 'DeleteCat' must be called but if i cant pass the ID of the category to be deleted this wont work.I know this can be done with commands and a repeater, but its not an option, i cant use a repeater.So apparanly this is what i am aiming for:
I have an extension method which I can use from the .cs codebehind of an aspx page, but if I try to do it in a code block in the aspx, it can't find the extension method. Is there something I need to add to the page?
I have the need to fire off a modal pop-up inline. I have a modal panel defined, and works when I click a test button on the page. Unfortunately I need it to work like this:
1.) A user clicks a 'Save' button
2.) In the code block for that button's Click event, there is a check for a certain constraint.
3.) If that constraint exists, I need to show the modal pop up and determine if the following code in the Click event is executed based off of the return of that modal pop up.
Easily accomplished using a Forms message box. But this is an ASP.net app. What I've tried so far is creating a button that uses a style with "display: none" and programmatically firing off that hidden button's click event. Unfortunately the code does execute but no modal pop up is displayed and the code continues to execute.
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.
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?
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 am trying to call a JavaScript function from my ascx control code behind in the catch blockI have tried the below two ways but they don't seem to work.
l Im downloading Pdfs using WebClient I used below code
try { WebClient wc = new WebClient(); Uri uriadd = new Uri(@"ftp://xxx.yyy..../httpdocs/FH/Foldername/" + clientorder1[i].Cloi_id + ".pdf"); wc.Credentials = new NetworkCredential("xxxx", "zzzz"); }
Its working fine but some times Gives Error like Object synchronization method was called from an unsynchronized block of code.. Why this Error coming ....
I have a windows application that stores a file on the current user's isolated storage, lets call this user Adam. On the same machine I have a Web service (The Web Service's application pool is running with Adam's credentials) that uses the same dll to access the file on the isolated storage but it is trying to access a file on the Default User's profile instead of the real user's profile (in this case Adams Profile)
Why is it trying to look for the file on the Default User's profile Instead of Adam's Profile? How can i make it look for the file in the right profile?. I'm running it on Win 2003, C# and .Net framework 3.5
We have had complaints of users losing data that they entered in textboxes in our ASP.NET 2.0 web application. Users are authenticated using Web Single Sign On method. My boss would like to save the client data in a file on their local disk in case they lose connectivity. I know this is not allowed with the default security of ASP.NET.
Would it be possible to programmatically change the ACL permissions for the NETWORK SERVICE account to access the isolated storage folder on the logged in user's local disk? Is there a better way to achieve this goal of persisting user data to a file?
I have menu item on my master page that has block around the text when the page is first run. I wrote in the css on the link and visited property to change the color to match the image color that it is on. When a menu item is clicked the color changes to the right color. How do I get it to the right color on when the page first opens or is there a way to get rid of the block or make it transperant?
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).
i have users who can logon to my site. I don't use the asp.net provider (i have my own user storage) but do use forms authentication. No i want to block users from log on twice to my app. Now what is the simplest thing to accomplish this? I thought about an extra field in the database in the user record but is there something simpler? is there a sort of 'session' for the entire application where i can remember who is logged on (and which is not flushed at a random time)? maybe in the cache (but the cache is sometimes flushed) i've seen an example where a file with the username was written to disk (and removed when logged out)
EDIT: Good question was: what do you mean with logon twice. I mean when a user logs on on another computer or when another person logs on with the same credentials
I intend to around existing code snippet (updating a Hashtable) with lock() block to prevent multiple threads (launched by ASP.NET web site) from simultaneously updating a Hashtable.
Bc this is first time I do in this measure, I need your advice on
Any performance overhead caution caused by lock() Any other issues you ever experienced similar to this scenarios.
