Try `System.Web.HttpContext.Current`. It should do the trick.

Gets HTTP-specific information about an individual HTTP request.

[MSDN](https://msdn.microsoft.com/en-us/library/system.web.httpcontext.current%28v=vs.110%29.aspx)

    this.HttpContext.ApplicationInstance.Context

Right now I have the following in my `.vimrc`:

    au BufWritePost *.c,*.cpp,*.h !ctags -R

There are a few problems with this:

 1. It&#39;s slow -- regenerates tags for files that haven&#39;t changed since the last tag generation.
 2. I have to push the enter button *again* after writing the file because of an inevitable &quot;press Enter or type command to continue&quot;.

When you combine these two issues I end up pushing the additional enter too soon (before `ctags -R` has finished), then see the annoying error message, and have to push enter again.

I know it doesn&#39;t sound like a big deal, but with the amount of file writes I do on a given day it tends to get really annoying. There&#39;s gotta be a better way to do it!

Vim auto-generate ctags

Is there a way of comparing two bitmasks in Transact-SQL to see if any of the bits match? I&#39;ve got a User table with a bitmask for all the roles the user belongs to, and I&#39;d like to select all the users that have &lt;em&gt;any&lt;/em&gt; of the roles in the supplied bitmask. So using the data below, a roles bitmask of 6 (designer+programmer) should select Dave, Charlie and Susan, but not Nick.

&lt;pre&gt;User Table
----------
ID  Username  Roles
1   Dave      6
2   Charlie   2
3   Susan     4
4   Nick      1

Roles Table
-----------
ID  Role
1   Admin
2   Programmer
4   Designer&lt;/pre&gt;

Any ideas? Thanks.

Comparing two bitmasks in SQL to see if any of the bits match

Unfortunately, I need to do this.  I&#39;m using ELMAH for my error log.  Before I route to my error.aspx view, I have to grab the default ELMAH error log so I can log the exception.  You used to be able to use 

    Elmah.ErrorLog.Default

However, this is now marked as obsolete.  The compiler directs me to use the method

    Elmah.ErrorLog.GetDefault(HttpContext context)

MVC&#39;s context is of type HttpContextBase, which enables us to mock it (YAY!).  How can we deal with MVC-unaware libraries that require the old style HttpContext?

How can you get the &quot;real&quot; HttpContext within an ASP.NET MVC application?

Unfortunately, I need to do this. I'm using ELMAH for my error log. Before I route to my error.aspx view, I have to grab the default ELMAH error log so I can log the exception. You used to be able to use
<pre><code class="hljs language-rust">Elmah.ErrorLog.Default
</code></pre>
However, this is now marked as obsolete. The compiler directs me to use the method
<pre><code class="hljs language-scss">Elmah.ErrorLog.GetDefault(HttpContext context)
</code></pre>
MVC's context is of type HttpContextBase, which enables us to mock it (YAY!). How can we deal with MVC-unaware libraries that require the old style HttpContext?

I have a controller with an action method as follows:

    public class InventoryController : Controller
    {
        public ActionResult ViewStockNext(int firstItem)
        {
            // Do some stuff
        }
    }

And when I run it I get an error stating:

&gt; The parameters dictionary does not contain a valid value of type &#39;System.Int32&#39; for parameter &#39;firstItem&#39;. To make a parameter optional its type should either be a reference type or a Nullable type.

I had it working at one point and I decided to try the function without parameters.  Finding out that the controller was not persistant I put the parameter back in, now it refuses to recognise the parameter when I call the method.

I&#39;m using this url syntax to call the action:

    http://localhost:2316/Inventory/ViewStockNext/11

Any ideas why I would get this error and what I need to do to fix it? 

I&#39;ve tried adding another method that takes an integer to the class it it also fails with the same reason.  I&#39;ve tried adding one that takes a string, and the string is set to null.  I&#39;ve tried adding one without parameters and that works fine, but of course it won&#39;t suit my needs.



ASP.NET MVC -  passing parameters to the controller

How do I go about using HTTPS for some of the pages in my ASP.NET MVC based site?

Steve Sanderson has a pretty good tutorial on how to do this in a DRY way on Preview 4 at:

http://blog.codeville.net/2008/08/05/adding-httpsssl-support-to-aspnet-mvc-routing/

Is there a better / updated way with Preview 5?,

SSL pages under ASP.NET MVC

I know what ViewData is and use it all the time, but in ASP.NET Preview 5 they introduced something new called TempData. 

I normally strongly type my ViewData, instead of using the dictionary of objects approach.

So, when should I use TempData instead of ViewData?

Are there any best practices for this? 

Difference Between ViewData and TempData?

If you are using ASP.NET MVC how are you doing grid display?
Rolled your own?
Got a library from somewhere?



These are some of the known grid display solutions I have found for ASP.NET MVC

 - [ASP.NET MVC Flexgrid ][1]   - Has nice column layout method
 - [Code based ASP.NET MVC GridView][2] - simple, small, clean
 - [MVC Contrib][3] - grid from codePlex
 - [jQueryGrid][4]  - jQuery grid
 - [Datatables][5]  - jQuery plugin - believed to be section 508 compliant ([.NET binding][6])
 - [extJS][7] - cross browser RIA framework - has grid support
 - [Ingrid][8] - jQuery data grid
 - [jqxGrid][9] - jQuery data grid
 - [Telerik MVC][10] - jQuery based grid that is GPL v2 licensed, commercial version also available
 - [MVC Controls Toolkit][11] - Client Site Based Grid
 - [Infragistics igGrid][12] - jQuery based MVC grid
 - [dhtmlxGrid][13] - Ajax-enabled JavaScript grid control 
 - [ASP.net MVC Awesome Ajax List][14] - a different, very flexible approach, can be used as a grid
 - [Syncfusion MVC Grid][15] - Commercial grid
 - [ASP.net MVC Awesome Grid][16] - part of the Awesome library (jQuery based)  
 - [Shield UI Grid for ASP.NET MVC][17]
 - [Grid controls for ASP.NET MVC 5 projects][18]

If you know of anything else that you are using or know to be good, please let me know.


  [1]: http://www.codeproject.com/KB/aspnet/MVCFlexigrid.aspx
  [2]: https://blog.maartenballiauw.be/post/2008/06/04/code-based-aspnet-mvc-gridview.html
  [3]: http://weblogs.asp.net/shijuvarghese/archive/2008/07/23/asp-net-mvc-grid-view-using-mvccontrib.aspx
  [4]: http://www.trirand.com/blog/?page%5Fid=6
  [5]: http://www.datatables.net/
  [6]: https://github.com/mcintyre321/mvc.jquery.datatables
  [7]: http://extjs.com/deploy/dev/examples/samples.html
  [8]: http://www.reconstrukt.com/ingrid/
  [9]: http://jqwidgets.com/
  [10]: http://demos.telerik.com/aspnet-mvc/
  [11]: http://mvccontrolstoolkit.codeplex.com/
  [12]: http://www.infragistics.com/dotnet/netadvantage/jquery-controls/grid.aspx
  [13]: http://www.dhtmlx.com/blog/?p=1349
  [14]: http://demo.aspnetawesome.com/Dinners
  [15]: http://mvc.syncfusion.com/sfmvcsamplebrowser/10.2.0.56/Grid_MVC/Samples/4.0/Razor
  [16]: http://demo.aspnetawesome.com/GridDemo
  [17]: http://demos.shieldui.com/mvc/grid-general/basic-usage
  [18]: http://mvc-grid.azurewebsites.net/

grid controls for ASP.NET MVC?

How do I go about the `[HandleError]` filter in asp.net MVC Preview 5?  
I set the customErrors in my Web.config file

    &lt;customErrors mode=&quot;On&quot; defaultRedirect=&quot;Error.aspx&quot;&gt;
      &lt;error statusCode=&quot;403&quot; redirect=&quot;NoAccess.htm&quot;/&gt;
      &lt;error statusCode=&quot;404&quot; redirect=&quot;FileNotFound.htm&quot;/&gt;
    &lt;/customErrors&gt;


 and put [HandleError] above my Controller Class like this:

    [HandleError]
    public class DSWebsiteController: Controller
    {
        [snip]
        public ActionResult CrashTest()
        {
            throw new Exception(&quot;Oh Noes!&quot;);
        }
    }
Then I let my controllers inherit from this class and call CrashTest() on them.
Visual studio halts at the error and after pressing f5 to continue, I get rerouted to Error.aspx?aspxerrorpath=/sxi.mvc/CrashTest (where sxi is the name of the used controller.
Off course the path cannot be found and I get &quot;Server Error in &#39;/&#39; Application.&quot; 404.

This site was ported from preview 3 to 5.
Everything runs (wasn&#39;t that much work to port) except the error handling.
When I create a complete new project the error handling seems to work.

Ideas?

**--Note--**  
Since this question has over 3K views now, I thought it would be beneficial to put in what I&#39;m currently (ASP.NET MVC 1.0) using.
In the [mvc contrib project][1] there is a brilliant attribute called &quot;RescueAttribute&quot;
You should probably check it out too ;)

  [1]: http://www.codeplex.com/MVCContrib

ASP.NET MVC HandleError

I am trying to use ELMAH to log errors in my ASP.NET MVC application, however when I use the [HandleError] attribute on my controllers ELMAH doesn&#39;t log any errors when they occur.

As I am guessing its because ELMAH only logs unhandled errors and the [HandleError] attribute is handling the error so thus no need to log it.

How do I modify or how would I go about modifying the attribute so ELMAH can know that there was an error and log it..

**Edit:** Let me make sure everyone understands, I know I can modify the attribute thats not the question I&#39;m asking... ELMAH gets bypassed when using the handleerror attribute meaning it won&#39;t see that there was an error because it was handled already by the attribute... What I am asking is there a way to make ELMAH see the error and log it even though the attribute handled it...I searched around and don&#39;t see any methods to call to force it to log the error....

How to get ELMAH to work with ASP.NET MVC [HandleError] attribute?

I just started using ELMAH and am a fan. My team supports a large number of web applications and I&#39;m particularly excited that ELMAH lets us save exceptions from each application to the same MS SQL database table.

We also support a few console, DLL and desktop applications.  Is it possible to use the ELMAH DLL to log exceptions in these apps to that same location?

Using ELMAH in a console application

We are using the excellent [ELMAH][1] to deal with unhandled exceptions in an ASP.NET 3.5 web application. This works extremely well for all of the site apart from WCF services which are being consumed using the REST features. When an exception occurs within the operation methods that is not handled by the application code, WCF handles it in various ways depending on the service contracts and configuration settings. This means that the exception does not end up firing the ASP.NET HttpApplication.Error event that [ELMAH][2] uses. The two solutions I am aware of to deal with this are:

 - Wrap all method calls in a try { } catch(Exception ex) { Elmah.ErrorSignal.FromCurrentContext().Raise(ex); throw; } to explicitly call Elmah within the catch block.
 - Use [IErrorHandler][3] as described in [Will Hughes&#39;][4] blog post [Making WCF and ELMAH play nice together][5] to factor out the call to ELMAH to a separate ErrorHandler.

The first option is extremely simple but is not exactly [DRY][6]. The second option only requires you to decorate each service with the custom attribute after implementing the attribute and the ErrorHandler. I have done this based on [Will&#39;s][4] work but I want to verify that this is the **correct approach** before posting the code.

**Is there a better way that I have missed?**

The MSDN documenation for [IErrorHandler][3] says that the **HandleError** method is the place to do the logging but [ELMAH][1] accesses the HttpContext.Current.**ApplicationInstance**, which is null within this method even though HttpContext.Current is available. Making the call to Elmah within the ProvideFault method is a workaround as ApplicationInstance is set but this does not match the intent described in the API documentation. **Am I missing something here?** The documentation does state that you should not rely on the HandleError method being called on the operation thread which may be why ApplicationInstance is null in this scope.

  [1]: http://code.google.com/p/elmah
  [2]: http://code.google.com/p/elmah
  [3]: http://msdn.microsoft.com/en-us/library/system.servicemodel.dispatcher.ierrorhandler.aspx
  [4]: http://will.hughesfamily.net.au/about/
  [5]: http://will.hughesfamily.net.au/20090505/making-wcf-and-elmah-play-nice-together/
  [6]: http://en.wikipedia.org/wiki/Don&#39;t_repeat_yourself

Exception Logging for WCF Services using ELMAH

I&#39;ve tried to use elmah with my asp.net site but whenever I try to go to http://localhost:port/elmah.axd I get resource not found exception. My web.config is given below.

        &lt;?xml version=&quot;1.0&quot;?&gt;
        &lt;configuration&gt;
          &lt;configSections&gt;
            &lt;sectionGroup name=&quot;elmah&quot;&gt;
              &lt;section name=&quot;security&quot; requirePermission=&quot;false&quot; 
                      type=&quot;Elmah.SecuritySectionHandler, Elmah&quot;/&gt;
              &lt;section name=&quot;errorLog&quot; requirePermission=&quot;false&quot; 
                      type=&quot;Elmah.ErrorLogSectionHandler, Elmah&quot; /&gt;
              &lt;section name=&quot;errorMail&quot; requirePermission=&quot;false&quot; 
                      type=&quot;Elmah.ErrorMailSectionHandler, Elmah&quot; /&gt;
              &lt;section name=&quot;errorFilter&quot; requirePermission=&quot;false&quot; 
                      type=&quot;Elmah.ErrorFilterSectionHandler, Elmah&quot;/&gt;
            &lt;/sectionGroup&gt;
          &lt;/configSections&gt;
          &lt;elmah&gt;
            &lt;security allowRemoteAccess=&quot;0&quot; /&gt;
            &lt;errorLog type=&quot;Elmah.SqlErrorLog, Elmah&quot; 
                     connectionStringName=&quot;elmah-sql&quot; /&gt;
            &lt;errorMail
                    from=&quot;my@account&quot;
                    to=&quot;myself&quot;
                    subject=&quot;ERROR From Elmah:&quot;
                    async=&quot;true&quot;
                    smtpPort=&quot;587&quot;
                    smtpServer=&quot;smtp.gmail.com&quot;
                    userName=&quot;my@account&quot;
                    password=&quot;mypassword&quot; /&gt;
          &lt;/elmah&gt;

          &lt;connectionStrings&gt;
            &lt;add name=&quot;elmah-sql&quot; connectionString=&quot;data source=(sqlserver); 
                   database=elmahdb;
                 integrated security=false;User ID=user;Password=password&quot;/&gt;
          &lt;/connectionStrings&gt;
          &lt;system.web&gt;
            &lt;compilation debug=&quot;true&quot;&gt;
              &lt;assemblies&gt;
                &lt;add assembly=&quot;Elmah, Version=1.0.10617.0, Culture=neutral, 
                   PublicKeyToken=null&quot;/&gt;
              &lt;/assemblies&gt;
            &lt;/compilation&gt;
            &lt;authentication mode=&quot;Windows&quot;/&gt;

            &lt;httpHandlers&gt;
              &lt;remove verb=&quot;*&quot; path=&quot;*.asmx&quot;/&gt;
              &lt;add verb=&quot;*&quot; path=&quot;*.asmx&quot; validate=&quot;false&quot; 
                type=&quot;System.Web.Script.Services.ScriptHandlerFactory, 
                   System.Web.Extensions, Version=3.5.0.0, Culture=neutral, 
                      PublicKeyToken=31BF3856AD364E35&quot;/&gt;
              &lt;add verb=&quot;*&quot; path=&quot;*_AppService.axd&quot; validate=&quot;false&quot; 
                   type=&quot;System.Web.Script.Services.ScriptHandlerFactory, 
                   System.Web.Extensions, Version=3.5.0.0, Culture=neutral, 
                       PublicKeyToken=31BF3856AD364E35&quot;/&gt;
              &lt;add verb=&quot;GET,HEAD&quot; path=&quot;ScriptResource.axd&quot; 
                     type=&quot;System.Web.Handlers.ScriptResourceHandler, 
                   System.Web.Extensions, Version=3.5.0.0, Culture=neutral, 
                        PublicKeyToken=31BF3856AD364E35&quot; validate=&quot;false&quot;/&gt;
            &lt;/httpHandlers&gt;
            &lt;httpModules&gt;
              &lt;add name=&quot;ScriptModule&quot; type=&quot;System.Web.Handlers.ScriptModule, 
                    System.Web.Extensions, Version=3.5.0.0, Culture=neutral, 
                    PublicKeyToken=31BF3856AD364E35&quot;/&gt;
            &lt;/httpModules&gt;
          &lt;/system.web&gt;

          &lt;system.webServer&gt;
            &lt;validation validateIntegratedModeConfiguration=&quot;false&quot;/&gt;
            &lt;modules runAllManagedModulesForAllRequests=&quot;true&quot;&gt;
              &lt;remove name=&quot;ScriptModule&quot;/&gt;
              &lt;add name=&quot;ScriptModule&quot; preCondition=&quot;managedHandler&quot; 
                    type=&quot;System.Web.Handlers.ScriptModule, 
                   System.Web.Extensions, Version=3.5.0.0, Culture=neutral, 
                     PublicKeyToken=31BF3856AD364E35&quot;/&gt;
              &lt;add name=&quot;ErrorMail&quot; type=&quot;Elmah.ErrorMailModule, Elmah&quot;/&gt;
              &lt;add name=&quot;ErrorLog&quot; type=&quot;Elmah.ErrorLogModule, Elmah&quot;/&gt;
              &lt;add name=&quot;ErrorFilter&quot; type=&quot;Elmah.ErrorFilterModule, Elmah&quot;/&gt;
            &lt;/modules&gt;

            &lt;handlers&gt;
              &lt;remove name=&quot;WebServiceHandlerFactory-Integrated&quot;/&gt;
              &lt;remove name=&quot;ScriptHandlerFactory&quot;/&gt;
              &lt;remove name=&quot;ScriptHandlerFactoryAppServices&quot;/&gt;
              &lt;remove name=&quot;ScriptResource&quot;/&gt;
              &lt;add name=&quot;ScriptHandlerFactory&quot; verb=&quot;*&quot; path=&quot;*.asmx&quot; 
                    preCondition=&quot;integratedMode&quot; 
                   type=&quot;System.Web.Script.Services.ScriptHandlerFactory, 
                        System.Web.Extensions, Version=3.5.0.0, 
                   Culture=neutral, PublicKeyToken=31BF3856AD364E35&quot;/&gt;
              &lt;add name=&quot;ScriptHandlerFactoryAppServices&quot; verb=&quot;*&quot; 
                path=&quot;*_AppService.axd&quot; preCondition=&quot;integratedMode&quot; 
                   type=&quot;System.Web.Script.Services.ScriptHandlerFactory, 
                     System.Web.Extensions, Version=3.5.0.0, 
                   Culture=neutral, PublicKeyToken=31BF3856AD364E35&quot;/&gt;
              &lt;add name=&quot;ScriptResource&quot; preCondition=&quot;integratedMode&quot; 
                verb=&quot;GET,HEAD&quot; path=&quot;ScriptResource.axd&quot; 
                   type=&quot;System.Web.Handlers.ScriptResourceHandler, 
                System.Web.Extensions, Version=3.5.0.0, 
                   Culture=neutral, PublicKeyToken=31BF3856AD364E35&quot;/&gt;
              &lt;add name=&quot;Elmah&quot; verb=&quot;POST,GET,HEAD&quot; path=&quot;elmah.axd&quot; 
                           preCondition=&quot;integratedMode&quot; 
                   type=&quot;Elmah.ErrorLogPageFactory, Elmah&quot;/&gt;
            &lt;/handlers&gt;
          &lt;/system.webServer&gt;
        &lt;/configuration&gt;

EDIT: Elmah = (Error Logging Modules and Handlers)  
http://code.google.com/p/elmah/

Elmah not working with asp.net site

I am having trouble trying to secure ELMAH.  I have followed Phil Haacked&#39;s [tutorial][1], with the only difference being the demo project is a web application and my project is a website.

       &lt;add verb=&quot;POST,GET,HEAD&quot; path=&quot;/admin/elmah.axd&quot; type=&quot;Elmah.ErrorLogPageFactory, Elmah&quot; /&gt;

       &lt;location path=&quot;admin&quot;&gt;
            &lt;system.web&gt;  
    	        &lt;authorization&gt;  
    		        &lt;deny users=&quot;?&quot;/&gt;  
    	        &lt;/authorization&gt;  
    	    &lt;/system.web&gt; 
        &lt;/location&gt;

With the leading &quot;/&quot; I receive the response that &quot;The resource cannot be found.&quot;, if I remove the leading &quot;/&quot; everything works fine except authentication can be bypassed by appending a directory name in front of /admin/elmah.axd.

For example without the leading &quot;/&quot;

www.mysite.com/admin/elmah.axd - triggers the authentication  
www.mysite.com/asdasdasd/admin/elmah.axd - does not trigger the authentication and displays ELMAH

How can I ensure that ELMAH is secure while maintaining the ability to remotely view the log?

Thanks.

Note to others:  
Following Alan&#39;s answer below results in the following.  

www.mysite.com/admin/elmah.axd - triggers the authentication    
www.mysite.com/admin/asdasdasd/elmah.axd - triggers the authentication     
www.mysite.com/asdasdasd/admin/elmah.axd - The resource cannot be found. (exactly what we wanted) 




  [1]: http://haacked.com/archive/2007/07/24/securely-implement-elmah-for-plug-and-play-error-logging.aspx

Content Type	Original Author	Original Content on Stackoverflow
Question	user1228	View Question on Stackoverflow
Solution 1 - asp.net Mvc	SHODAN	View Answer on Stackoverflow
Solution 2 - asp.net Mvc	rodrigo caballero	View Answer on Stackoverflow

How can you get the "real" HttpContext within an ASP.NET MVC application?

asp.net Mvc Problem Overview

asp.net Mvc Solutions

Solution 1 - asp.net Mvc

Solution 2 - asp.net Mvc

Comparing two bitmasks in SQL to see if any of the bits match

Vim auto-generate ctags

Attributions