EF Database models (.edmx) files are not opening in special VS EF data model designer. Just standard XML editor is working. All happening in VS2017 at win 10 (64).
Here is the declaration of the EDMX file
<Edmx Version="3.0" xmlns="http://schemas.microsoft.com/ado/2009/11/edmx">
This is the line where I have the issue
<Schema Namespace="CodeFirstDatabaseSchema" Provider="System.Data.SqlServerCe.4.0" ProviderManifestToken="4.0" Alias="Self" xmlns:customannotation="http://schemas.microsoft.com/ado/2013/11/edm/customannotation" xmlns="http://schemas.microsoft.com/ado/2009/11/edm/ssdl"`>
I have this problem:
"Severity Code Description Project File Line Suppression State Error Error 175: The ADO.NET provider with invariant name 'System.Data.SqlServerCe.4.0' is either not registered in the machine or application config file, or could not be loaded. See the inner exception for details. SmartStore.Web D:\Dev\HMZ\RC5.0\builds\SmartStoreNET-3.x\src\Presentation\SmartStore.Web\App_Data\EfCache\SmartStore.Data.SmartObjectContext.edmx 5552"
most of the solutions found on the web won't work.
Please, people, help me with this. So terrible, experience. I'm trying to solve this problem 3-4 days.
I tried most of those answers I could find over the web: like updating/re-installing the SQL Compact, editing web.config provider factories, and etc.
Web Config (MVC 5/.NET 4.7.2)
<DbProviderFactories>
<remove invariant="System.Data.SqlServerCe.4.0" />
<add name="Microsoft SQL Server Compact Data Provider 4.0" invariant="System.Data.SqlServerCe.4.0" description=".NET Framework Data Provider for Microsoft SQL Server Compact" type="System.Data.SqlServerCe.SqlCeProviderFactory, System.Data.SqlServerCe, Version=4.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" />
<remove invariant="System.Data.SQLite" />
<add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".NET Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite, Version=1.0.111.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139" />
</DbProviderFactories>
<!-- Add the attribute 'codeConfigurationType' to the 'entityFramework' root element to overwrite the global DbConfiguration -->
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlCeConnectionFactory, EntityFramework">
<parameters>
<parameter value="System.Data.SqlServerCe.4.0" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="System.Data.SqlServerCe.4.0" type="System.Data.Entity.SqlServerCompact.SqlCeProviderServices, EntityFramework.SqlServerCompact" />
</providers>
</entityFramework>
According to the Error you edited above:
'System.Data.SqlServerCe.4.0' is either not registered in the machine or application config file, or could not be loaded.
it can be a good idea to remove the dll for System.Data.SqlServerCe and add it again:
install Microsoft SQL Server Compact 4.0
Right click the References folder and select Add Reference... option.
Go to the Assemblies | Extensions option on the left pane, then scroll to System.Data.SqlServerCe in the right pane. (or through the Browse button go to the installation directory and select the dll)
You might try these 3 solutions:
Firstly, you can use one of the online XML parsers (eg. https://onlinexmltools.com/validate-xml) to make sure the XML is correct. If any errors exist, removing that section will fix the issue and the model will be shown after Clean and Rebuild.
right-click the edmx file-> choose Open with->choose ADO.NET Entity Data Model Designer
You can also fix it by deleting the file and regenerating it again.
On the Visual Studio Installer, Click Modify, Select Individual Components tab, and make sure Entity Framework Under SDKs, libraries, and framework check-box is selected. Make sure you re-start visual studio.
Related
I am trying to connect to Oracle using the Oracle Data Provider.NET (ODP.NET) using Entity Framework v6 in an MVC application.
I have installed ODP.NET from here:
https://www.nuget.org/packages/odp.net.entityframework/6.121.1-beta
I have configured my web.config file as follows:
<connectionStrings>
<add name="MyDB" connectionString="User ID=MyUser;Password=MyPassword;Data Source=MyDatabase; Persist Security Info=False" providerName="Oracle.ManagedDataAccess" />
</connectionStrings>
<entityFramework>
<providers>
<provider invariantName="Oracle.ManagedDataAccess.Client" type="Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices, Oracle.ManagedDataAccess.EntityFramework, Version=6.121.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
</providers>
</entityFramework>
However, when I try to call my EF Context, I get the following error:
The Entity Framework provider type 'Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices, Oracle.ManagedDataAccess.EntityFramework, Version=6.121.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342' registered in the application config file for the ADO.NET provider with invariant name 'Oracle.ManagedDataAccess.EntityFramework' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application
I have spent a lot of time searching for help with this. Would be very grateful for any help!
Thanks!
Martin
Adding this section to the web.config, along with the steps above, seems to have fixed this:
<system.data>
<DbProviderFactories>
<add name="ODP.NET, Managed Driver"
invariant="Oracle.ManagedDataAccess.Client"
description="Oracle Data Provider for .NET, Managed Driver"
type="Oracle.ManagedDataAccess.Client.OracleClientFactory, Oracle.ManagedDataAccess, Version=4.121.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
</DbProviderFactories>
</system.data>
There can be your framework problem. Please check your framework by right clicking on project--> properties check it is 4.5 version.
And then right click on Refrences--> Manage NuGet Package.. go to the nuget.org and type "Official Oracle ODP.NET" in search box. and install Official Oracle ODP.NET, Managed Entity Framework.
Official Oracle ODP.NET, Managed Driver.
Oracle Data Provider for .Net x84/x64.
Thanking you
Is there a way to programmatically create the "ida" keys in
below?
<add key="ida:FederationMetadataLocation" value="http://xxxxx/FederationMetadata" />
<add key="ida:Issuer" value="http://xxxxxx/Issuer" />
<add key="ida:ProviderSelection" value="productionSTS" />
Configuration.AppSettings is a writable collection so you can certainly do this . These keys, however are only needed for the "identity and access" visual studio plugin. AFAIK they are never used at runtime so there is little use in creating them.
I'm trying a 90 day free trial of azure. It is super easy to deploy/publish the website and create the database, but for some reason my tables are not being created in the database. I'm using entity framework 4.4(i believe) and code first migrations. I've read that azure uses its own connection string, but I went ahead and changed my connection strings as well. I Spent hours on this and I can't figure out what is wrong and why my tables are not being created. I deploy website, enable-migrations, add-migration, update-database, then publish with checking the checkbox for code-first. Maybe my connection string is wrong? Any help is greatly appreciated.
In 'MyProject.Web' web.config:
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
<connectionStrings>
<add name="DefaultConnection" connectionString="Data Source=tcp:n98my***.database.windows.net,1433;Initial Catalog=slutips_db;User Id=****;Password=****;" />
</connectionStrings>
Then in 'MyProject.Data' app.config, where my datacontext.cs is held:
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<contexts>
<context type="SeluCmpsTutorials.Data.DataContext">
<databaseInitializer type="System.Data.Entity.MigrateDatabaseToLatestVersion">
<parameters>
<parameter value="slutips_db"/>
</parameters>
</databaseInitializer>
</context>
</contexts>
</entityFramework>
Also I noticed even though all my connection strings are changed, when I add-migration and update-database, it still using the ./sqlexpress local database, how is that possible?
key gotcha to be aware of regarding sql azure connections: for userid it actually usually needs to be user id # server name - do would read youruserid#n98my*** in the connectionstring.
Also, not sure if you need the "tcp:" (not using it) and you may also want to add providerName="System.Data.SqlClient"
Does your db user have necessary permissions for database modification ?
How did you set up your user ?
Initially you should create login for Azure sql server, sometihing like this:
(execute following sql on your server master database, replace angle-brackets values with actual values)
CREATE LOGIN [<SomeServerLogin>] WITH PASSWORD=N'<somepassword>'
Then connect to your slutips_db database as admin and execute following sql
CREATE USER [<slutips_db_user>] FROM LOGIN [<SomeServerLogin>];
GO;
EXEC sp_addrolemember 'dbmanager', '<slutips_db_user>';
GO;
EXEC sp_addrolemember 'loginmanager', '<slutips_db_user>';
GO;
'dbmanager' role allows table creation\management.
'loginmanager' role enables creation of another users in current database (your slutips_db_user will be allowed to execute CREATE USER <slutips_db_user1> FROM LOGIN <SomeServerLogin1> clause
Edit1: Also - ensure that your connection string user have user#n98my*** (user#server) format.
If you follow this tutorial: https://www.windowsazure.com/en-us/develop/net/tutorials/web-site-with-sql-database/ It'll show you how to connect Visual Studio (2012 in the example, not sure if works for any others) with Azure - basically you want to log into the portal, and download the publishing credentials. This will contain your database connection string, which you can then use to push code first migrations up to Azure.
What it looks like you've done is manually added in properties to the app.config yourself. The way the publish works, it defines a local version in your .config file like thus:
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="v11.0" />
</parameters>
</defaultConnectionFactory>
Then, when you publish, VS will auto-magically insert the required stuff into your .config - if I go and FTP to my web site and look at the generated .config file, you see this:
<contexts>
<context type="Web_App.Models.TrackSafeDb, Web App">
<databaseInitializer type="System.Data.Entity.MigrateDatabaseToLatestVersion`2[[Web_App.Models.TrackSafeDb, Web App], [Web_App.Migrations.Configuration, Web App]], EntityFramework, PublicKeyToken=*******************">
<parameters>
<parameter value="Web_App.Models.TrackSafeDb_DatabasePublish" />
</parameters>
</databaseInitializer>
</context>
</contexts>
So I'd try removing the extraneous stuff from your local app.config and re-publishing
Try adding encryption to your connection string...
<connectionStrings>
<add name="DefaultConnection" connectionString="Data Source=tcp:n98my***.database.windows.net,1433;Initial Catalog=slutips_db;User Id=****;Password=****;Integrated Security=False;Persist Security Info=True;Encrypt=True" />
</connectionStrings>
what i did was go to my azure management portal.
clicked on databases.
went view connection strings and then copied those directly into my relevant config.
in my case its "release" config.
make sure that the web config transformations are enabled and working correctly.
also make sure you've enabled firewall access to each of the db's...
you have to click "enable connection through firewall" or something similar.
its in the db options on the portal.
After seeing this question for a few days, a couple of thoughts. First, is the name of your context is infact DefaultConnection. Entity Framework (in order to be used with the parameterless constructor) likes the connection string name to match the name of the context.
For instance, if your declare a new context variable as such:
var context = new MyEntities();
Then your connection string should be called MyEntities
<connectionStrings>
<add name="MyEntities" connectionString="Data Source=tcp:n98my***.database.windows.net,1433;Initial Catalog=slutips_db;User Id=****;Password=****;" />
</connectionStrings>
Second, are you 100% sure that there are no web.config transformation files and/or that you also properly updated the connection strings in those files?
Third, remember that upon deployment, any configuration file other than the web.config is essentially ignored. The executing assembly is the web application, not the data project or any others. Any configurations relating to EF setup and deployment should be located in the web.config file (like the snippet that you have in your data app.config)
I had the exact same problem and it was linked to my password containing '%' character.
I checked the resulting web.config on Azure connecting with ftp and the part of my password containing '95%a' turned to '95ยช' ... automagically. That might be a bug in the web deployment feature of azure, because the password was correct in my publish profile locally.
If indeed the resulting password to the DB is corrupted in the resulting connection string, you have to reset it :
From Windows Azure Management, in the SQL DATABASES tab, select the SERVERS list (not the DATABASE list) and click on your server
In the Dashboard, there is a link to reset the admin password
In visual studio, update the password in your publish profile's connectionString (Settings, Databases)
Make a change to the web.config (a real one, not a comment), or it won't be re-published
Publish, and on first use of the database, the migrations will be applied
I'm trying to put together FederatedAuthentication with .NET 4.5, MVC 4, and active redirect using a custom server-side login page, using code from this tutorial, and from this code sample.
Redirecting to the LogOn method of my AccountController works fine, and the method looks like this:
public ActionResult LogOn()
{
HrdClient hrdClient = new HrdClient();
WSFederationAuthenticationModule fam = FederatedAuthentication.WSFederationAuthenticationModule; /*** Fails here because this is null **/
HrdRequest request = new HrdRequest(fam.Issuer, fam.Realm, context: Request.QueryString["ReturnUrl"]);
IEnumerable<HrdIdentityProvider> hrdIdentityProviders = hrdClient.GetHrdResponse(request);
ViewData["Providers"] = hrdIdentityProviders;
return View();
}
This fails because FederatedAuthentication.WSFederationAuthenticationModule is null.
Using VS 2012, I've run the new Identity and Access wizard (which seems to replace the old STS dialog). This has given me a folder of FederationMetadata, which appears correct, and several modifications to my Web.Config. In particular, the modules section looks like this:
<system.webServer>
<validation validateIntegratedModeConfiguration="false" />
<modules runAllManagedModulesForAllRequests="true">
<add name="WSFederationAuthenticationModule" type="System.IdentityModel.Services.WSFederationAuthenticationModule, System.IdentityModel.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" preCondition="managedHandler" />
<add name="SessionAuthenticationModule" type="System.IdentityModel.Services.SessionAuthenticationModule, System.IdentityModel.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" preCondition="managedHandler" />
</modules>
And having seen SO answers 8937123 and 8926099, I've added the following as well:
<httpModules>
<add name="WSFederationAuthenticationModule" type="Microsoft.IdentityModel.Web.WSFederationAuthenticationModule, Microsoft.IdentityModel, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
</httpModules>
And finally my nuget packages config shows Microsoft.IdentityModel, which is correctly referenced by the MVC app:
<packages>
<package id="Microsoft.IdentityModel" version="6.1.7600.16394" targetFramework="net45" />
</packages>
I've also seen this question on social.msdn, which just seems to suggest that the STS dialog does need to be run.
Can anybody explain why FederatedAuthentication.WSFederationAuthenticationModule would be null, and what I can do to stop this happening?
I managed to fix this myself, and since there are a few unanswered questions similar to this on SO, I'll leave the question up and post my own answer.
The issue is to do with upgrading the MVC application to .NET 4.5. Much of the WIF functionality remains the same (at least on the surface), but the classes have all moved to different assemblies. I fixed my problem following the migration guidelines here: http://msdn.microsoft.com/en-us/library/jj157089.aspx
The most important thing is to remove old references to the Microsoft.IdentityModel package (v 3.5.0) and make sure they are replaced by similar references to the System.IdentityModel and System.IdentityModel.Services dlls, which should be version 4.0, and come from the GAC rather than an external package.
My steps to fix were:
Clean out all the junk I'd added to Web.Config and start again with a default MVC Config file.
Remove the Microsoft.IdentityModel package and de-reference the dll
Run the Access and Identity wizard in VS 2012
Duplicate the System.IdentityModel.Services.WSFederationAuthenticationModule reference from <system.webServer><modules> in <system.web><httpModules>
Add <authentication mode="Forms"><forms loginUrl="~/Account/LogOn" /></authentication>
Compile, test, dance little jig of delight...
And this got the original WIF3.5 / MVC3 Code Sample working under.NET 4.5
I have just created an ASP.NET MVC 4 project and used Visual Studio 2012 RC to create a Controller and Razor Views for Index and Create Actions.
When I came to run the application, and browsed to the Create view, the following error was shown:
Compiler Error Message: CS0103: The name 'Scripts' does not exist in
the current context
The problem is the following code which was added automatically to the bottom of the View:
#section Scripts {
#Scripts.Render("~/bundles/jqueryval")
}
Why does Scripts not exist?
I looked at the base Web Page class in Assembly System.Web.Mvc.dll, v4.0.0.0
I can see the following helper properties available:
Ajax
Html
Url
But nothing named Scripts.
Any ideas?
EDIT:
My Web.config file looks like this (untouched from the one that Visual Studio created):
<system.web.webPages.razor>
<host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="System.Web.Mvc.WebViewPage">
<namespaces>
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Routing" />
</namespaces>
</pages>
</system.web.webPages.razor>
EDIT #2:
People are blogging about using the #Scripts helper:
SCOTT HANSELMAN Blog
Codebetter.com
Yet having just installed Visual Studio 2012 RC onto a fresh Windows 8 install I am still unable to use #Scripts even though Visual Studio adds it to the generated View!
Solutions are presented below.
I am not sure how to close this, because in the end an update seemed to resolve the issue. I double checked I had performed a clean install, using a new project. But the same failing project I had made works fine now after various updates and no manual obvious intervention. Thanks for all of the thoughts but there was definitely an issue at the time ;)
The key here is to add
<add namespace="System.Web.Optimization" />
to BOTH web.config files. My scenario was that I had System.Web.Optimization reference in both project and the main/root web.config but #Scripts still didn't work properly. You need to add the namespace reference to the Views web.config file to make it work.
UPDATE:
Since the release of MVC 4 System.Web.Optimization is now obsolete. If you're starting with a blank solution you will need to install the following nuget package:
Install-Package Microsoft.AspNet.Web.Optimization
You will still need to reference System.Web.Optimization in your web.config files. For more information see this topic:
How to add reference to System.Web.Optimization for MVC-3-converted-to-4 app
As many pointed out, restart of VS could be required after the above steps to make this work.
#Styles and #Scripts are 2 new helpers provided by System.Web.Optimization library. As the name suggests, they bundle and minify CSS and JavaScript files or resources respectively.
Try including the namespace System.Web.Optimization either by #using directive or through web.config
http://ofps.oreilly.com/titles/9781449320317/ch_ClientOptimization.html#BundlingAndMinification
UPDATE
Microsoft has moved the bundling/minification to a separate package called Microsoft.AspNet.Web.Optimization. You can download the assembly from nuget.
This post will be useful to you.
There was one small step missing from the above, which I found on another post. After adding
<add namespace="System.Web.Optimization" />
to your ~/Views/web.config namespaces, close and re-open Visual Studio. This is what I had to do to get this working.
I am using areas, and have just come up against this issue, I just copied the namespaces from the root web.config to the areas web. config and it now works!!
<add namespace="System.Web.Helpers" />
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Optimization" />
<add namespace="System.Web.Routing" />
<add namespace="System.Web.WebPages" />
I had the same problem and I used WinMerge to help me track this down. But as I researched it more, I found that Rick has the perfect blog post for it.
Summary:
Add <add namespace="System.Web.Optimization"/> to both web.config files
Run Install-Package -IncludePrerelease Microsoft.AspNet.Web.Optimization
Update Bundling code
Update Layout file
The last step is to update 10 other libraries. I didn't and it worked fine. So looks like you can procrastinate this one (unless I already updated 1 or more of them). :)
I had the same issue:
The System.Web.Optimization version I was using was outdated for MVC4 RC.
I updated my packages using the package manager in VS 2010.
In this MSDN blog, Mr. Andy talks about how to update your MVC 4 Beta project to MVC 4 RC. Updating my packages got the Scripts (particularly the web optimization one) to resolve for me:
To install the latest System.Web.Optimization package, use Package Manager Console (Tools -> Library Package Manager -> Package Manager Console) and run the below command:
Install-Package -IncludePrerelease Microsoft.AspNet.Web.Optimization
Use the System.Web.Optimization file included in the package in your references.
To update other packages:
Tools menu -> Library Package Manager -> Manage NuGet Packages for Solution.
Create a new MVC 4 RC internet application and run it. Navigate to Login which uses the same code
#section Scripts {
#Scripts.Render("~/bundles/jqueryval")
}
What allows Login.cshtml to work is the the Views\Web.config file (not the app root version) contains
<namespaces>
<add namespace="System.Web.Optimization"/>
</namespaces>
Why is your Create view not working and Login is?
Import System.Web.Optimization on top of your razor view as follows:
#using System.Web.Optimization
I ran into this problem, however while running the command:
Install-Package -IncludePrerelease Microsoft.AspNet.Web.Optimization
I received the cryptic message (gotta love a great pun before the first cup of coffee):
Install-Package : The specified cryptographic algorithm is not
supported on this platform.
I am running this on Windows XP SP3 (not by choice) and what I found was that I had to follow the instructions posted by the user artsnob on the ASP.NET Forum
Please uninstall the Nuget and try re-installing it. If you are unable to do this, login as an Administrator.
Go to Tools=> Extension Manager => Select "Nuget Package Manager" => UnInstall
Install it again, by searching "Nuget" => Install.
If it did not work, please try installing, 1.7.x version as I mentioned in the previous post (It doesn't mean, you have to use the previous version, if it works fine, we can report this bug, and get the patches for the latest version).
Once I ran this I could then run the command line to update the Web.Optimization.
Hope this saves someone some digging.
Just write
#section Scripts{
<script src="#System.Web.Optimization.BundleTable.Bundles.ResolveBundleUrl("~/bundles/jqueryval")"></script>
}
I upgraded from Beta to RC and faced 'Scripts' does not exist issue. Surfed all over the web and the final solution is what N40JPJ said plus another workaroudn:
Copy the following in View\Web.config :
<namespaces>
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Routing" />
<add namespace="System.Web.Optimization"/>
<add namespace="System.Web.Helpers"/>
</namespaces>
and the following inside View\Shared_Layout.cshtml
#if (IsSectionDefined("scripts"))
{
#RenderSection("scripts", required: false)
}
Hope it helps.
Apparently you have created an 'Empty' project type without 'Scripts' folder.
My advice
-create a 'Basic' project type with full 'Scripts' folder.
With respect to all developers.
just remove/ hide the code from create & Edit razor view of your controller.
#section Scripts {
#Scripts.Render("~/bundles/jqueryval")
}
: remove view page.
: add namespace webconfig (in view directory)
: create view an try!
good luck...
One more for the pot - spent ages trying to work out the same problem - even though it was defined in the web.config for root and the root of Views. Turns out I'd mistakenly added it to the <system.web><pages><namespaces>, and not <system.web**.webPages.razor**><pages><namespaces> element.
Really easy to miss that!
When I enter on a page that haves this code:
#section Scripts {
#Scripts.Render("~/bundles/jqueryval")
}
This error occurs: Error. An error occurred while processing your request.
And this exception are recorded on my logs:
System.Web.HttpException (0x80004005): The controller for path '/bundles/jqueryval' was not found or does not implement IController.
em System.Web.Mvc.DefaultControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType)
...
I have tried all tips on this page and none of them solved for me. So I have looked on my Packages folder and noticed that I have two versions for System.Web.Optmization.dll:
Microsoft.AspNet.Web.Optimization.1.1.0 (v1.1.30515.0 - 68,7KB)
Microsoft.Web.Optimization.1.0.0-beta
(v1.0.0.0 - 304KB)
My project was referencing to the older beta version. I only changed the reference to the newer version (69KB) and eveything worked fine.
I think it might help someone.
That has an obvious solution. I had the same problem later. Not related to Assembly References or ... .It'll occur In hierarchy calling of MVC Partial views, when you have complicated page structures. So calling/rendering each part separately on each page (maybe a master page or partial) will cause to not see required parts of page like the bellow code :
#RenderSection("Scripts", required: false)
That simply forces page to find and render related section and in case of failure shows you an error message like you.
So I suggest you to trace your pages (like program trace) from master to all of its partials to Detect Dependencies. Maybe it be a terrible work, but no other choices available here.
Not that according to my experience, some conditional situations in programming causes not to show you the right error causes the problem.
I had this issue after I added an Area to a project that didn't have any.
To get rid of it just copied the web.config withing root Views folder to the Views folder of the area and it started working.
For me this solved the problem, in NuGet package manager console write following:
update-package microsoft.aspnet.mvc -reinstall
When i started using MVC4 recently i faced the above issue while creating a project with the empty templates.
Steps to fix the issue.
Goto TOOLS --> Library Package Manager --> Packager Manager Console
Paste the below command and press enter
Install-Package Microsoft.AspNet.Web.Optimization
Note: wait for successful installation.
Goto Web.Config file in root level and add below namespace in pages namespace section.
add <namespace="System.Web.Optimization" />
Goto Web.Config in Views folder and follow the step 2.
Build the solution and run.
The Package mentioned in step 1 will add few system libraries into the solution references like System.Web.Optimization is not a default reference for empty templates in MVC4.
I hope this helps.
Thank you
I had a very similar error when upgrading a project from MVC3 to MVC4.
Compiler Error Message: CS0103: The name [blah] does not exist in the
current context
In my case, I had outdated version numbers in several of my Web.Configs.
I needed to update the System.Web.Mvc version number from "3.0.0.0" to "4.0.0.0" in every Web.Config in my project.
I needed to update all of my System.Web.WebPages, System.Web.Helpers, and System.Web.Razor version numbers from "1.0.0.0" to "2.0.0.0" in every Web.Config in my project.
Ex:
<configSections>
<sectionGroup name="system.web.webPages.razor" type="System.Web.WebPages.Razor.Configuration.RazorWebSectionGroup, System.Web.WebPages.Razor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<section name="host" type="System.Web.WebPages.Razor.Configuration.HostSection, System.Web.WebPages.Razor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
<section name="pages" type="System.Web.WebPages.Razor.Configuration.RazorPagesSection, System.Web.WebPages.Razor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
</sectionGroup>
</configSections>
...
<compilation debug="true" targetFramework="4.0">
<assemblies>
<add assembly="System.Web.Helpers, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.WebPages, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</assemblies>
</compilation>
Be sure to review the Web.Configs in each of your Views directories.
You can read more about Upgrading an ASP.NET MVC 3 Project to ASP.NET MVC 4.
If you added to your web.config and it still shows message, then you need to close your project and reopen it, now it will exist and #Styles.Render("") and #Scripts.Render() will work fine.
I solve this problem in MvcMusicStore by add this part of code in _Layout.cshtml
#if (IsSectionDefined("scripts"))
{
#RenderSection("scripts", required: false)
}
and remove this code from Edit.cshtml
#section Scripts {
#Scripts.Render("~/bundles/jqueryval")
}
Try this:
#section Scripts
{
Scripts.Render("~/bundles/jqueryval") // <- without ampersand at the begin
}