Web Forms ::error While Trying To Create A Class Lib Project Name 'HttpContext'?

Jul 17, 2010

I get this error while trying to create a class lib project Name 'HttpContext' is not declared.i included Imports System.Web.

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Using Visual Studio 2005

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For instance if I'm inside the Page_Load method and I want to get query string data I just do this:

public partial class Product_Detail : System.Web.UI.Page
{
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{
[code].....

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HttpContext Class And Response Property?

Feb 21, 2011

I have question about HttpContext class (http://msdn.microsoft.com/en-us/library/system.web.httpcontext.aspx). This class has Responseproperty (http://msdn.microsoft.com/en-us/library/system.web.httpcontext.response.aspx). But I don't understand, why Response property hasHttpResponse return value, not HttpContext (this is HttpContext, not HttpResponse property).So, why there is:

[Code]....

not

[Code]....

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HttpContext.Current.Session Is Throwing Exception In Business Class

Sep 8, 2010

In our application we have to access session objects in business class. We are using HttpContext.Current.Session to get the session value. In some cases it returns the value but mostly its throwing a null reference exception(Object reference not set to an instance of an object). We have the following code Try

If HttpContext.Current.Session("Username") IsNot Nothing then
' Statements to be executed
End If
Catch ex As Exception
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Here HttpContext.Current.Session("Username") is mostly throwing an exception "Object reference not set to an instance of an object" While debugging we found that HttpContext.Current itself is nothing.

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MVC :: Access HTTPContext And Session From Custom Base Controller Class?

Jan 13, 2010

I built a base controller class inherits from Controller class to add some custom behavior to all controllers which will inherit from this base class.

My issue is when I try to access HTTPContext and Session objects in my custom base class, they are always null.

Am I doing something wrong or need missing something?

My custom base class definition:

public class ApplicationControllerBase : Controller

controllers classes definition:

public class HomeController : ApplicationControllerBase

using ASP.NET MVC 1, .NET 3.5.

UPDATE:

It seems the issue is I try to access HTTPContext in the constructor while HTTPContext is not ready yet, I tried it in the OnActionExecuted event handler and it works fine.

My question is what is the best place to access Session object in my custom controller class, that will guarantee executing my code with all controllers.

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HttpContext.Current.Request.UserHostName Is Empty When Called From A Class

Apr 15, 2010

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)?

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HttpHandlers / Modules :: Implement Custom HttpContext For Each Request Under Class That Implements IHTTPHandler?

Aug 10, 2010

I created an application and implemented IHTTPHandler for all incoming request ending with ".aspx" extension.Under "ProcessRequest" module, I am creating an instance of HttpContext (with URL attributes different from my application's URL i.e. if I am working on localhost then speciying Yahoo.com as its URL) and assigning it to "context" which comes as method argument.After redirection, an error is generated. Also, the custom HTTPContext is not passed to the requested page (default.aspx, in my case.)Code is as follows.

[Code]....

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Mar 11, 2010

I'm trying create unit testing for an existing website project (not web application project). I cannot access my under test classes unless I use accessor. However, if I use accessor, I have problem to initiate an object with passing arguments. I only want to create unit tetsing for App_Code. After searching web, and I found that I'd better to create a web application project using my current existing website project. From solution explorer, add new project ->using existing website. My questions is: what impact will have for my current website to create the new project? Should I just convert my current website to web application? If do that, will it cuase problems on my website? I am new on asp.net, still learning..

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I have use Nhibernate in my MVC Project by me known, Nhibernate have cache on Session and Object. now, I want use HttpContext.Current.Cache (system.web) for cache data something in project. my code same that have problem, haven't it. and that's right or wrong.

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Jul 23, 2010

I have an ASP.NET web site project where I am using both VB.Net and C# class files. I have included separate sub folders in the App_Code directory for classes of each language.However, while I can successfully make use of a C# class in a VB class, I cannot do the opposite: use a a VB class in a C# class.

So, to illustrate, I might have two classes such as this:

Public Class VBTestClass
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I get an error that "the type or namespace "VBTestClass" could not be found". What am I missing here?

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C# - Workaround For HttpContext.HideRequestResponse Being Internal? Detect If HttpContext.Request Is Really Available?

Apr 9, 2010

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.

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is possible to create another property like 'userid' as i can access like

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i created a web project and add some class and user controls (ASCX files). then i build it and from the generated DLL file.

i add it (DLL file) to my actual web application and called the classes that i have made everthing works fine.

so the problem is the web user control, i don't know how can i use it. i know that it must be place to the aspx file but how?

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To be able to implement paging i need to create a helper class (as mentioned on one example in the net ); so i have created a class that encapsulate the paging logic

public class PagingList<T> : List<T>
.
..

but when i reference this class in my view using the code below:-

Models.PagingList<Article>

The following error occurred. Server Error in '/' Application. Compilation Error Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS0246: The type or namespace name 'Article' could not be found (are you missing a using directive or an assembly reference?) Source Error:

[Code]....

Source File: c:UsersMohannadAppDataLocalTempTemporary ASP.NET Files
oot1f3f505f568b8e69App_Web_index.aspx.82d38c66.ffjpt45i.0.cs Line: 172
Show Detailed Compiler Output:

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I have downloaded a project from the internet called the SMS Source example. I wanted to open this project in VS2010, so a conversion wizard has popped up prompting for the conversion. But it has errors in converting.

Error msg:

Conversion Report - SMSSend.csproj:
Error converting project file. MSB0001: Internal MSBuild Error: Missing resource 'MissingAttribute'

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I recently updated my VS2010 website project from .NET 3.5 to 4.0. Everything was working fine in the website project. Today I decided to migrate the website to a web application project as I have learned this is the best way to work in .NET. I split out all my class files into a separate class library and copied all my other content into my new project. Then I updated all the references and web.config.

When I build the class library, everything works great. The problem is happening when I try to build/debug the web application project. It is acting like all the controls are missing and it is also throwing a bunch of compile errors about the public properties I have in my master pages.

Control errors: "The name 'INSERT CONTROL NAME HERE' does not exist in the current context"

Master page errors:'System.Web.UI.MasterPage' does not contain a definition....

It is giving these errors for every single control and master page property in my entire solution.I notice when I add a new web.form to this project, it also adds a filename.aspx.designer.cs file in addition to the .aspx and .aspx.cs file. My existing files do not have these extra files since they were created in a different .NET version.

UPDATE: It seems I was missing the step where I need to right click on the new application folder and select "Convert to web application". I just did that and it seems to be a little bit better...

Now it is choking on Literals that are inside single quotes:

<div class='<asp:Literal ID="CssClassLiteral" runat="server"></asp:Literal>'>

It doesn't see this literal when it does the conversion... Is the above valid code or should I implement that functionality another way?

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How to have the basepage class outside the project?

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i'm having a serious problem when i' trying to use "HttpContext.Current".

What i' trying to do is to get a querystring value by:

"HttpContext.Current.Request.QueryString["..."]" (in my page base class)

But i got this error:

"Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack"

What could be causing this problem?

[code]....

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