The source of your error may be that you do not have a reference to the MVC framework library. A simple solution is to add this reference trough Nuget. The MVC library will be installed in your `bin` directory and, if needed, all the references will be added to your project.

Either browse for the MVC package (_Tools -&gt; Nuget Package Manager -&gt; Manage Nuget Packages for Solution_) or install it using the Nuget console (_Tools -&gt; Nuget Package Manager -&gt; Package Manager Console_) by entering `Install-Package Microsoft.AspNet.Mvc`. You can find additional information on the [official Nuget page for AspNet.Mvc][1].


  [1]: https://www.nuget.org/packages/Microsoft.AspNet.Mvc/

My solution was to simply open up the nuget package manager console and run the command &lt;code&gt;update-package -reinstall Microsoft.AspNet.Mvc&lt;/code&gt;

Sometimes the package version conflict becomes an issue where if you have the MVC package installed then it shows the namespace error.

Here is how I solved it:

 - Open Package Manager Console (Tools &gt; NuGet Package Manager &gt; Package Manager Console)
 - Type uninstall-package Microsoft.AspNet.Mvc
 - Type install-package Microsoft.AspNet.Mvc

So this will give your package a fresh start, you will have all new MVC references and no errors.

Including MVC controller and Model in the project resolved the issue.

I was googling about how to create a user and grant all privileges to him.

I found these two methods :

The first method :

    create user userName identified by password;
    grant connect to userName;
    grant all privileges to userName;

The second method :

    grant connect , resource to userName identified by password;

So what&#39;s the difference between those two methods ?

Create a user with all privileges in Oracle

How do I pull a reference out of an `Option` and pass it back with the specific lifespan of the caller? 

Specifically, I want to borrow a reference to a `Box&lt;Foo&gt;` from a `Bar` that has an `Option&lt;Box&lt;Foo&gt;&gt;` in it. I thought I would be able to do:

    impl Bar {
        fn borrow(&amp;mut self) -&gt; Result&lt;&amp;Box&lt;Foo&gt;, BarErr&gt; {
            match self.data {
                Some(e) =&gt; Ok(&amp;e),
                None =&gt; Err(BarErr::Nope),
            }
        }
    }


...but that results in:

&lt;!-- language: none --&gt;

    error: `e` does not live long enough
      --&gt; src/main.rs:17:28
       |
    17 |             Some(e) =&gt; Ok(&amp;e),
       |                            ^ does not live long enough
    18 |             None =&gt; Err(BarErr::Nope),
    19 |         }
       |         - borrowed value only lives until here
       |
    note: borrowed value must be valid for the anonymous lifetime #1 defined on the body at 15:54...
      --&gt; src/main.rs:15:55
       |
    15 |       fn borrow(&amp;mut self) -&gt; Result&lt;&amp;Box&lt;Foo&gt;, BarErr&gt; {
       |  _______________________________________________________^ starting here...
    16 | |         match self.data {
    17 | |             Some(e) =&gt; Ok(&amp;e),
    18 | |             None =&gt; Err(BarErr::Nope),
    19 | |         }
    20 | |     }
       | |_____^ ...ending here
    
    error[E0507]: cannot move out of borrowed content
      --&gt; src/main.rs:16:15
       |
    16 |         match self.data {
       |               ^^^^ cannot move out of borrowed content
    17 |             Some(e) =&gt; Ok(&amp;e),
       |                  - hint: to prevent move, use `ref e` or `ref mut e`

Hm, ok. Maybe not. It looks vaguely like what I want to do is related to [`Option::as_ref`](https://doc.rust-lang.org/std/option/enum.Option.html#method.as_ref), like maybe I could do:

    impl Bar {
        fn borrow(&amp;mut self) -&gt; Result&lt;&amp;Box&lt;Foo&gt;, BarErr&gt; {
            match self.data {
                Some(e) =&gt; Ok(self.data.as_ref()),
                None =&gt; Err(BarErr::Nope),
            }
        }
    }

...but, that doesn&#39;t work either. 

Full code I&#39;m having trouble with:

    #[derive(Debug)]
    struct Foo;
    
    #[derive(Debug)]
    struct Bar {
        data: Option&lt;Box&lt;Foo&gt;&gt;,
    }
    
    #[derive(Debug)]
    enum BarErr {
        Nope,
    }
    
    impl Bar {
        fn borrow(&amp;mut self) -&gt; Result&lt;&amp;Box&lt;Foo&gt;, BarErr&gt; {
            match self.data {
                Some(e) =&gt; Ok(&amp;e),
                None =&gt; Err(BarErr::Nope),
            }
        }
    }
    
    #[test]
    fn test_create_indirect() {
        let mut x = Bar { data: Some(Box::new(Foo)) };
        let mut x2 = Bar { data: None };
        {
            let y = x.borrow();
            println!(&quot;{:?}&quot;, y);
        }
        {
            let z = x2.borrow();
            println!(&quot;{:?}&quot;, z);
        }
    }

I&#39;m reasonably sure what I&#39;ve trying to do is valid here.


How do I borrow a reference to what is inside an Option&lt;T&gt;?

I have recently installed visual studio 2013. After downloaded a sample project from web, while i run it, it gives me the following errors-

    The type or namespace name &#39;Mvc&#39; does not exist in the namespace &#39;System.Web&#39; (are you missing an assembly reference?)	


How to overcome this error?


The type or namespace name &#39;Mvc&#39; does not exist

I have recently installed visual studio 2013. After downloaded a sample project from web, while i run it, it gives me the following errors-
<pre><code class="hljs language-arduino">The type or namespace name 'Mvc' does not exist in the namespace 'System.Web' (are you missing an assembly reference?)	
</code></pre>
How to overcome this error?

*There&#39;s a great question here:* [https://stackoverflow.com/questions/11990036/how-to-add-web-api-to-an-existing-asp-net-mvc-4-web-application-project][1]

Unfortunately, it wasn&#39;t enough to solve my problem. I&#39;ve tried twice to be sure I haven&#39;t done anything wrong. I right clicked on &quot;Controllers&quot; and added the item &quot;Web API 2 Controller with actions, using Entity Framework&quot; where I selected my model class and db context. Everything went fine... but still... everytime I&#39;ve tried to access /api/Rest I was getting a 404 error (The name of my Controller is RestController).

  [1]: https://stackoverflow.com/questions/11990036/how-to-add-web-api-to-an-existing-asp-net-mvc-4-web-application-project

404 error after adding Web API to an existing MVC Web Application

First of all, I have not seen this error anywhere else and I guess it&#39;s not a replicate so please read the whole situation first.
------------------------------------------------------------------------

Everything was working just fine then I tried to *update one of my model classes* ( the **App class** and the update is now left commented ) which I will be listing below; and boom I had this ugly error. 


----------


&gt; The model backing the &#39;ApplicationDbContext&#39; context has changed since the database was created. Consider using Code First Migrations to update the database (http://go.microsoft.com/fwlink/?LinkId=238269). at System.Data.Entity.CreateDatabaseIfNotExists`1.InitializeDatabase(TContext context) at System.Data.Entity.Internal.InternalContext.&lt;&gt;c__DisplayClassf`1.b__e() at System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) at System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() at System.Data.Entity.Internal.LazyInternalContext.b__4(InternalContext c) at System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input) at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action) at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase() at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() at System.Data.Entity.Internal.Linq.InternalSet`1.Include(String path) at System.Data.Entity.Infrastructure.DbQuery`1.Include(String path) at System.Data.Entity.QueryableExtensions.Include[T](IQueryable`1 source, String path) at System.Data.Entity.QueryableExtensions.Include[T,TProperty](IQueryable`1 source, Expression`1 path) at Microsoft.AspNet.Identity.EntityFramework.UserStore`6.GetUserAggregateAsync(Expression`1 filter) at Microsoft.AspNet.Identity.EntityFramework.UserStore`6.FindByNameAsync(String userName) at Microsoft.AspNet.Identity.UserManager`2.FindByNameAsync(String userName) at Microsoft.AspNet.Identity.UserManager`2.d__12.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at ControlPanel.Web.Controllers.AccountController.d__2.MoveNext() in d:\Projects\FULL\Control Panel\ControlPanel.Web\Controllers\AccountController.cs:line 56

**At first** I thought it might be a migrations problem, so I dropped the database entirely, re-enabled the migrations, and added an Init migration and updated the database using 


    update-database -force -verbose

Everything goes well with no complaints, however, whenever I try to log in to my site I get the previous error. I did the migration thing about ten times without being able to solve the problem.

Here are my domain classes ( models ):

    public class App
    {
        [Key]
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public virtual int AppId { get; set; }
        //[Required]
        public virtual string FacebookId { get; set; }
        //[Required]
        public virtual string Secret { get; set; }      
        public virtual List&lt;User&gt; Users { get; set; }
        public virtual List&lt;Post&gt; Posts { get; set; }      
        //public virtual ApplicationUser Admin { get; set; }
    }

    public class Post
    {
        [Key]
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public virtual int PostId { get; set; }
        public virtual string Content { get; set; }
        public virtual string Link { get; set; }
        public virtual string Image { get; set; }
        public virtual bool IsSpecial { get; set; }
        //[Required]
        public virtual App App { get; set; }
        //[Required]
        public virtual DateTime? PublishDate { get; set; }
    }

    public class User
    {
        [Key]
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public virtual int UserId { get; set; }

        [MaxLength(500)]
        public virtual string FacebookId { get; set; }

        [MaxLength(500)]
        public virtual string Token { get; set; }

        //[Required]
        public virtual App App { get; set; }
    }

Here are my IdentityModels:

    public class ApplicationUser : IdentityUser
    {
        public virtual List&lt;App&gt; Apps { get; set; }
        public bool? IsPremium { get; set; }
        [DataType(DataType.Date)]
        public DateTime? LastPublishDateTime { get; set; }
    }

    public class ApplicationDbContext : IdentityDbContext&lt;ApplicationUser&gt;
    {
        public ApplicationDbContext()
            : base(&quot;dCon&quot;)
        {
        }
        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
            modelBuilder.Entity&lt;IdentityUser&gt;().ToTable(&quot;Admins&quot;);
            modelBuilder.Entity&lt;ApplicationUser&gt;().ToTable(&quot;Admins&quot;);
            modelBuilder.Entity&lt;IdentityUserRole&gt;().ToTable(&quot;AdminRoles&quot;);
            modelBuilder.Entity&lt;IdentityUserLogin&gt;().ToTable(&quot;Logins&quot;);
            modelBuilder.Entity&lt;IdentityUserClaim&gt;().ToTable(&quot;Claims&quot;);
            modelBuilder.Entity&lt;IdentityRole&gt;().ToTable(&quot;Roles&quot;);
        }
    }

The model backing the &#39;ApplicationDbContext&#39; context has changed since the database was created

I am making a CORS POST request and setting the Content-Type header to json. This triggers a Preflight OPTIONS request to fire (this is good and expected)

This OPTIONS request is responded to with a 200 OK but this isn&#39;t coming from my WebAPI application. 

I have a custom Message Handler in place and it never get&#39;s hit so the request is getting responded to by IIS prior to hitting ASP.NET it seems.

I have found several posts on the subject and they say the following

1. Make sure WebDav is uninstalled / removed / disabled - **DONE**

2. Make sure the OPTIONSVerbHandler is removed / changed to use aspnet_isapi.dll - **TRIED BOTH**

3. Make sure the extensionlessURLHandler includes the OPTIONS verb - **DONE**

However, my options request is still getting hijacked. By that I mean, IIS responds with at 200 OK but isn&#39;t including an Access-Control-Allow-Origin header in the response. It isn&#39;t including this header because it is never getting to my WebAPI CORS code that would set this header.

The two best posts I could find that sound like my issue are 

here: https://stackoverflow.com/questions/14897247/jquery-stuck-at-cors-preflight-and-iis-ghost-response

and here: http://brockallen.com/2012/10/18/cors-iis-and-webdav/

I have tried turning on Failed Request tracing (FERB) in IIS and set it to trace all 200 status codes. I don&#39;t ever see the options request being logged... Not sure if this means FERB doesn&#39;t track OPTIONS requests or if I need to change something in the FERB settings to make it track OPTIONS requests, Or if this is a clue to what my problem is? 


This is ASP.NET WebAPI 2.0 running on IIS 7.5 (Also tested on IIS 8 and IISExpress with same results)
Doesn&#39;t matter what browser (Chrome, FF, and IE all fail the same way) 


I have tried everything I can find on the subject and still can&#39;t fix my problem.

Help me StackOverflow, you&#39;re my only hope.



IIS hijacks CORS Preflight OPTIONS request

I want to know, there is any technique so we can pass `Model` as a parameter in `RedirectToAction`

For Example:

	public class Student{
		public int Id{get;set;}
		public string Name{get;set;}
	}

Controller

	public class StudentController : Controller
	{
		public ActionResult FillStudent()
		{
			return View();
		}
		[HttpPost]
		public ActionResult FillStudent(Student student1)
		{
			return RedirectToAction(&quot;GetStudent&quot;,&quot;Student&quot;,new{student=student1});
		}
		public ActionResult GetStudent(Student student)
		{
			return View();
		}
	}

**My Question - Can I pass student model in RedirectToAction?**

Can we pass model as a parameter in RedirectToAction?

I am new to **ASP.NET MVC** and **Web API** and trying to get the basics. AFAIK, we have project templates in VS 2013, named as `MVC`, `Web API` and `Both of them together`.

I have gone through the tutorials and learned that we can make an API by using MVC alone as well as with Web API Template.

So, What are the differences between these, based on **Architecture** and **Usage**?



Difference between MVC 5 Project and Web Api Project

I am currently trying to install the XNA Game Studio for Visual Studio Express 2013. And I accidentally ran the .vsix program BEFORE actually installing the XNA framework.

After installing it and re-running the .vsix, I get a message error saying that the extension has already been installed. Which is not false.

I have tried a lot of things to &quot;delete&quot; the empty extension : going in %LocalAppData%\Microsoft\VisualStudio and trying to find the extension, but finding myself with nothing, for example.

I would like to know how I can properly uninstall and reinstall the framework.

How to uninstall .vsix Visual Studio Extensions?

We know a random port number is assigned to a web application in Visual Studio. It works fine in my office desktop. But when I pull the code onto my laptop (from VisualStudio.com) and run the web app. I got a message, saying,

# The specified port is in use 

Port 10360 is already being used by another application.

## Recommendations

 1. Try switching to port other than 10360 and higher than 1024.
 2. Stop the application that is using port 10360.

----------

I can fix it using `Recommendation #1` by changing the port into something else like 13333. But I am very curious what happened to port 10360. How can I check what application is using port 10360? How can I stop that application?



Why and how to fix? IIS Express &quot;The specified port is in use&quot;

How do I open .rptproj in Visual Studio 2013 Pro? When I try to open SSRS projects originally created in VS2008, in VS2013 I get:

    Unsupported
    This version of Visual Studio is unable to open the following projects. The project types may not be installed or this version of Visual Studio may not support them. 
    For more information on enabling these project types or otherwise migrating your assets, please see the details in the &quot;Migration Report&quot; displayed after clicking OK.



How do I open SSRS (.rptproj) files in Visual Studio 2013?

My company is upgrading our Visual Studio 2012 to 2013 Premium. In the midst of this, we are also looking to start automating our tests using [Visual Studio Team Services][1]

I have read a couple of MSTest vs nUnit posts and articles in the past but most of it compares the older version of MSTest. Also, nUnit had a lot of favourable reviews as compared to MSTest.

My question is, considering Microsoft&#39;s commitment towards the ALM, Agile practices and all the new stuff they&#39;ve added into VS2013 Premium and Visual Studio Team Services to facilitate and encourage automated testing, how does MSTest compare to nUnit? 

What other considerations should I take before making a decision on a testing framework to use?


  [1]: https://www.visualstudio.com/products/tfs-overview-vs

Visual Studio 2013 MSTest vs NUnit

While in debug mode, the solution explorer has a Script Documents section.  It is expanded by default.  As the debugger runs, new `ScriptDocumentxxx poll.txt` files are added to this section.  As I am navigating the explorer files, the adding of these new line items causes the entire contents of the explorer to shift downward.  This is quite annoying if I am trying to find a file or trying to click something.  I can collapse the section manually, but I&#39;d rather not have to do this all of the time.

![enter image description here][1]


  [1]: http://i.stack.imgur.com/iVRqR.png

Content Type	Original Author	Original Content on Stackoverflow
Question	s.k.paul	View Question on Stackoverflow
Solution 1 - asp.net Mvc	Andrei V	View Answer on Stackoverflow
Solution 2 - asp.net Mvc	Jason Evans	View Answer on Stackoverflow
Solution 3 - asp.net Mvc	noobprogrammer	View Answer on Stackoverflow
Solution 4 - asp.net Mvc	Aashish Malviya	View Answer on Stackoverflow

The type or namespace name 'Mvc' does not exist

asp.net Mvc Problem Overview

asp.net Mvc Solutions

Solution 1 - asp.net Mvc

Solution 2 - asp.net Mvc

Solution 3 - asp.net Mvc

Solution 4 - asp.net Mvc

How do I borrow a reference to what is inside an Option<T>?

Create a user with all privileges in Oracle

Attributions