Try this:

    var manager = ((IObjectContextAdapter)dbContext).ObjectContext.ObjectStateManager;

Try this:
    
    dbContext.Entry(entity).State = EntityState.Modified;


I have 

    LinkedHashMap&lt;String, List&lt;String&gt;&gt; hMap;

I want to get `List&lt;String&gt;` by **position** not on key.

I don&#39;t want to use iterate.

Is there any other way to get Value based on index ?


How get value from LinkedHashMap based on index not on key?

Here is how I check whether `mystring` begins with some string:

    &gt;&gt;&gt; mystring.lower().startswith(&quot;he&quot;)
    True

The problem is that `mystring` is very long (thousands of characters), so the `lower()` operation takes a lot of time.

**QUESTION:** Is there a more efficient way?

My unsuccessful attempt:

    &gt;&gt;&gt; import re;
    &gt;&gt;&gt; mystring.startswith(&quot;he&quot;, re.I)
    False


Case-insensitive string startswith in Python

I need to return a list of newly added objects from my database context. 

I have read that i have to use `ObjectStateManager` for this purpos. The problem is, that my database context does not have the `ObjectStateManager` property. 

The context works fine for retrivieing, adding and updating objects though.

I am using EF 5.0

    &lt;section name=&quot;entityFramework&quot; type=&quot;System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089&quot; requirePermission=&quot;false&quot; /&gt;

What can i do?

Why does the ObjectStateManager property not exist in my db context?

I need to return a list of newly added objects from my database context.
I have read that i have to use <code>ObjectStateManager</code> for this purpos. The problem is, that my database context does not have the <code>ObjectStateManager</code> property.
The context works fine for retrivieing, adding and updating objects though.
I am using EF 5.0
<pre><code class="hljs language-ini">&#x3C;section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</code></pre>
What can i do?

I need to be able to control how/whether certain properties on a class are serialized. The simplest case is `[ScriptIgnore]`. However, I only want these attributes to be honored for this one specific serialization situation I am working on - if other modules downstream in the application also want to serialize these objects, none of these attributes should get in the way.

So my thought is to use a custom attribute `MyAttribute` on the properties, and initialize the specific instance of JsonSerializer with a hook that knows to look for that attribute.

At first glance, I don&#39;t see any of the available hook points in JSON.NET will provide the `PropertyInfo` for the current property to do such an inspection - only the property&#39;s value. Am I missing something? Or a better way to approach this?

Exclude property from serialization via custom attribute (json.net)

I am confused about the difference between sending items through Post() or SendAsync(). My understanding is that in all cases once an item reached the input buffer of a data block, control is returned to the calling context, correct? Then why would I ever need SendAsync? If my assumption is incorrect then I wonder, on the contrary, why anyone would ever use Post() if the whole idea of using data blocks is to establish a concurrent and async environment. 

I understand of course the difference technically in that Post() returns a bool whereas SendAsync returns an awaitable Task of bool. But what implications does that have? When would the return of a bool (which I understand is a confirmation whether the item was placed in the queue of the data block or not) ever be delayed? I understand the general idea of the async/await concurrency framework but here it does not make a whole lot sense because other than a bool the results of whatever is done to the passed-in item is never returned to the caller but instead placed in an &quot;out-queue&quot; and either forwarded to linked data blocks or discarded.

And is there any performance difference between the two methods when sending items? 



TPL Dataflow, whats the functional difference between Post() and SendAsync()?

I am getting following error in my C# visual studio project:

&gt;The type or namespace name &#39;VisualStudio&#39; does not exist in the namespace &#39;Microsoft&#39; (are you missing an assembly reference?)

I also tried to find the microsoft.dll file but couldn&#39;t get any reference. 
Am I searching the wrong DLL?

    using Microsoft.VisualStudio.TestTools.UnitTesting;  
    using Kya.MsFx.Services.Swiper;

    namespace Kya.MsFx.Devices.Swiper.Test
    {
    [TestClass]
    public class SwiperWindowTest
    {

        private SwiperWebServiceHost m_SwiperWS = null;
        /// &lt;summary&gt;
        ///     start web service on a separate thread, so tests 
        ///     can be executed withut blocking the application thread
        /// &lt;/summary&gt;
        [ClassInitialize]
        public void SetupSwiperTests() {

            m_SwiperWS = SwiperWebServiceHost.StartService();

        }

        /// &lt;summary&gt;
        /// Stop service started during class initialize and kill the thread
        /// &lt;/summary&gt;
        [ClassCleanup]
        public void CleanupSwiperTests() {
            m_SwiperWS.Stop();
        }

        
        /// &lt;summary&gt;
        ///   simulate init, swipe, clear operations
        /// &lt;/summary&gt;
        [TestMethod]
        public void TestSwiperService()
        {
            MessageBox.Show(&quot;test&quot;);
        }
    }
    }


Where to find &quot;Microsoft.VisualStudio.TestTools.UnitTesting&quot; missing dll?

In C# language and .NET framework, could you help me with understanding delegates?
I was trying to check some code, and found that the results I received were unexpected for me. Here it is:

    class Program
    {
        public static int I = 0;
        
        static Func&lt;string&gt; del = new Func&lt;string&gt;(I.ToString);
       
        static void Main(string[] args)
        {
            I = 10;
            Console.WriteLine(&quot;{0}&quot;, del());
        }
    }

The answer was 0, but not 10. Why? 


Using delegates in C#

Could you explain [ValidateAntiForgeryToken][1] purpose and show me example about `ValidateAntiForgeryToken` in MVC 4?

I could not find any examples which explain this attribute?


  [1]: http://msdn.microsoft.com/en-us/library/system.web.mvc.validateantiforgerytokenattribute%28v=vs.100%29.aspx

ValidateAntiForgeryToken purpose, explanation and example

I want to disable cascade deletes for a link table with entity framework code-first.  For example, if many users have many roles, and I try to delete a role, I want that delete to be blocked *unless* there are no users currently associated with that role.  I already remove the cascade delete convention in my `OnModelCreating`:

	protected override void OnModelCreating(DbModelBuilder modelBuilder) {
		...
		modelBuilder.Conventions.Remove&lt;OneToManyCascadeDeleteConvention&gt;();

And then I set up the user-role link table:

	modelBuilder.Entity&lt;User&gt;()
		.HasMany(usr =&gt; usr.Roles)
		.WithMany(role =&gt; role.Users)
		.Map(m =&gt; {
			m.ToTable(&quot;UsersRoles&quot;);
			m.MapLeftKey(&quot;UserId&quot;);
			m.MapRightKey(&quot;RoleId&quot;);
		});

Yet when EF creates the database, it creates a delete cascade for the foreign key relationships, eg.

	ALTER TABLE [dbo].[UsersRoles]  WITH CHECK ADD  CONSTRAINT [FK_dbo.UsersRoles_dbo.User_UserId] FOREIGN KEY([UserId])
	REFERENCES [dbo].[User] ([UserId])
	ON DELETE CASCADE
	GO
	
	ALTER TABLE [dbo].[UsersRoles]  WITH CHECK ADD  CONSTRAINT [FK_dbo.UsersRoles_dbo.Role_RoleId] FOREIGN KEY([RoleId])
	REFERENCES [dbo].[Role] ([RoleId])
	ON DELETE CASCADE
	GO

How can I stop EF generating this delete cascade?

How to disable cascade delete for link tables in EF code-first?

I have a controller action that works fine on Firefox both locally and in production, and IE locally, but not IE in production.  Here is my controller action:

    public ActionResult MNPurchase()
    {
        CalculationViewModel calculationViewModel = (CalculationViewModel)TempData[&quot;calculationViewModel&quot;];
    
        decimal OP = landTitleUnitOfWork.Sales.Find()
            .Where(x =&gt; x.Min &gt;= calculationViewModel.SalesPrice)
            .FirstOrDefault()
            .OP;
    
        decimal MP = landTitleUnitOfWork.Sales.Find()
            .Where(x =&gt; x.Min &gt;= calculationViewModel.MortgageAmount)
            .FirstOrDefault()
            .MP;
    
        calculationViewModel.LoanAmount = (OP + 100) - MP;
        calculationViewModel.LendersTitleInsurance = (calculationViewModel.LoanAmount + 850);
    
        return View(calculationViewModel);
    }


Here is the stack trace I get in IE:

&gt;   Error.
    An error occurred while processing your request.
    System.Reflection.TargetException: Non-static method requires a target. at 
System.Reflection.RuntimeMethodInfo.CheckConsistency(Object target) at 
System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck(Object obj, BindingFlags 
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at 
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder 
binder, Object[] parameters, CultureInfo culture) at 
System.Reflection.RuntimePropertyInfo.GetValue(Object obj, Object[] index) at 
System.Data.Objects.ELinq.QueryParameterExpression.TryGetFieldOrPropertyValue(MemberExpression me, Object instance, Object&amp; memberValue) at 
System.Data.Objects.ELinq.QueryParameterExpression.TryEvaluatePath(Expression expression, ConstantExpression&amp; constantExpression) at 
System.Data.Objects.ELinq.QueryParameterExpression.EvaluateParameter(Object[] arguments) 
at System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan(Nullable``1 forMergeOption) 
at System.Data.Objects.ObjectQuery``1.GetResults(Nullable``1 forMergeOption) at 
System.Data.Objects.ObjectQuery``1.System.Collections.Generic.IEnumerable&lt;T&gt;.GetEnumerator()
 at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable``1 source) at 
System.Linq.Queryable.FirstOrDefault[TSource](IQueryable``1 source) at 
LandTitle.Controllers.HomeController.MNRefi() at lambda_method(Closure , ControllerBase ,
 Object[] ) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext 
controllerContext, IDictionary``2 parameters) at 
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext 
controllerContext, ActionDescriptor actionDescriptor, IDictionary``2 parameters) at 
Castle.Proxies.Invocations.ControllerActionInvoker_InvokeActionMethod.InvokeMethodOnTarget() at Castle.DynamicProxy.AbstractInvocation.Proceed() at 
Glimpse.Mvc3.Interceptor.InvokeActionMethodInterceptor.Intercept(IInvocation invocation) at Castle.DynamicProxy.AbstractInvocation.Proceed() at 
Castle.Proxies.AsyncControllerActionInvokerProxy.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary``2 parameters) at 
System.Web.Mvc.Async.AsyncControllerActionInvoker.&lt;&gt;c__DisplayClass37.&lt;&gt;c__DisplayClass39.&lt;BeginInvokeActionMethodWithFilters&gt;b__33() at 
System.Web.Mvc.Async.AsyncControllerActionInvoker.&lt;&gt;c__DisplayClass4f.&lt;InvokeActionMethodFilterAsynchronously&gt;b__49() at 
System.Web.Mvc.Async.AsyncControllerActionInvoker.&lt;&gt;c__DisplayClass37.&lt;BeginInvokeActionMethodWithFilters&gt;b__36(IAsyncResult asyncResult) at 
System.Web.Mvc.Async.AsyncControllerActionInvoker.&lt;&gt;c__DisplayClass25.&lt;&gt;c__DisplayClass2a.&lt;BeginInvokeAction&gt;b__20() at System.Web.Mvc.Async.AsyncControllerActionInvoker.&lt;&gt;c__DisplayClass25.&lt;BeginInvokeAction&gt;b__22(IAsyncResult asyncResult)

Non-static method requires a target

How do I use Entity Framework 5 Code First Migrations to create a full database script from the initial (empty) state to the latest migration?

The blog post at [MSDN Blog][1] suggests to do this, but it seems to create an empty script:

    Update-Database -Script -SourceMigration: $InitialDatabase

  [1]: http://msdn.microsoft.com/en-us/data/jj591621.aspx

Generate full SQL script from EF 5 Code First Migrations

I am trying to run my tests on TeamCity which is currently installed on my machine.

&gt; `System.InvalidOperationException`: 
&gt; 
&gt; The Entity Framework provider type
&gt; &#39;`System.Data.Entity.SqlServer.SqlProviderServices,
&gt; EntityFramework.SqlServer`, `Version=6.0.0.0, Culture=neutral,
&gt; PublicKeyToken=b77a5c561934e089&#39;` for the &#39;`System.Data.SqlClient`&#39;
&gt; ADO.NET provider could not be loaded. Make sure the provider assembly
&gt; is available to the running application. 
&gt; 
&gt; See http://go.microsoft.com/fwlink/?LinkId=260882 for more
&gt; information..

I have no reference to `System.Data.Entity` in any of my projects as was suggested on codeplex for upgrading to EF6.

So, I am not sure why am I getting this exception.
I do not get any such exception when I run the tests from VS.

I did try to set CopyLocal to false then again to true.. but that does not seem to work either.

Update 

My app.config has the following . Does this cause some behavior that I don&#39;t understand ?

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;configuration&gt;
      &lt;configSections&gt;
        &lt;section name=&quot;entityFramework&quot; type=&quot;System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089&quot; requirePermission=&quot;false&quot; /&gt;
        &lt;!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --&gt;
      &lt;/configSections&gt;
      &lt;entityFramework&gt;
        &lt;defaultConnectionFactory type=&quot;System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework&quot; /&gt;
      &lt;/entityFramework&gt;
    &lt;/configuration&gt;


I get the following stacktrace in teamcity .


    [MSTest] IntegrationTests.CrudTest+QuestionTest.Create
    [03:59:11][IntegrationTests.CrudTest+QuestionTest.Create] Initialization method IntegrationTests.CrudTest+QuestionTest.Initialize threw exception. System.InvalidOperationException: System.InvalidOperationException: The Entity Framework provider type &#39;System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089&#39; for the &#39;System.Data.SqlClient&#39; ADO.NET provider could not be loaded. Make sure the provider assembly is available to the running application. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information..
    [03:59:11]
    [IntegrationTests.CrudTest+QuestionTest.Create]     at System.Data.Entity.Config.ProviderServicesFactory.GetInstance(String providerTypeName, String providerInvariantName)
       at System.Data.Entity.Config.ProviderServicesFactory.GetInstanceByConvention(String providerInvariantName)
       at System.Data.Entity.Config.DefaultProviderServicesResolver.GetService(Type type, Object key)
       at System.Data.Entity.Config.CachingDependencyResolver.&lt;&gt;c__DisplayClass1.&lt;GetService&gt;b__0(Tuple`2 k)
       at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
       at System.Data.Entity.Config.CachingDependencyResolver.GetService(Type type, Object key)
       at System.Data.Entity.Config.ResolverChain.&lt;&gt;c__DisplayClass3.&lt;GetService&gt;b__0(IDbDependencyResolver r)
       at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
       at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
       at System.Data.Entity.Config.ResolverChain.GetService(Type type, Object key)
       at System.Data.Entity.Config.RootDependencyResolver.GetService(Type type, Object key)
       at System.Data.Entity.Config.ResolverChain.&lt;&gt;c__DisplayClass3.&lt;GetService&gt;b__0(IDbDependencyResolver r)
       at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
       at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
       at System.Data.Entity.Config.ResolverChain.GetService(Type type, Object key)
       at System.Data.Entity.Config.CompositeResolver`2.GetService(Type type, Object key)
       at System.Data.Entity.Config.IDbDependencyResolverExtensions.GetService[T](IDbDependencyResolver resolver, Object key)
       at System.Data.Entity.Config.InternalConfiguration.GetService[TService](Object key)
       at System.Data.Entity.Config.DbConfiguration.GetService[TService](Object key)
       at System.Data.Entity.Utilities.DbProviderFactoryExtensions.GetProviderServices(DbProviderFactory factory)
       at System.Data.Entity.Infrastructure.DefaultManifestTokenService.GetProviderManifestToken(DbConnection connection)
       at System.Data.Entity.Utilities.DbConnectionExtensions.GetProviderInfo(DbConnection connection, DbProviderManifest&amp; providerManifest)
       at System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection)
       at System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext)
       at System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input)
       at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
       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.get_InternalContext()
       at System.Data.Entity.Internal.Linq.InternalSet`1.ActOnSet(Action action, EntityState newState, Object entity, String methodName)
       at System.Data.Entity.Internal.Linq.InternalSet`1.Add(Object entity)
       at System.Data.Entity.DbSet`1.Add(TEntity entity)
       at EFRepository.Infrastructure.EFRepository`1.Add(T item) in c:\TeamCity\buildAgent\work\da2ea4e72c0e77f0\Repository\Infrastructure\EFRepository.cs:line 22
       at IntegrationTests.CrudTest.Initialize() in c:\TeamCity\buildAgent\work\da2ea4e72c0e77f0\IntegrationTests\CrudTest.cs:line 34

Entity Framework Provider type could not be loaded?

I always used Repository pattern but for my latest project I wanted to see if I could perfect the use of it and my implementation of “Unit Of Work”. The more I started digging I started asking myself the question: **&quot;Do I really need it?&quot;**

Now this all starts with a couple of comments on Stackoverflow with a trace to Ayende Rahien&#39;s post on his blog, with 2 specific,

* &lt;a href=&quot;http://ayende.com/blog/3955/repository-is-the-new-singleton&quot;&gt;repository-is-the-new-singleton&lt;/a&gt;
* &lt;a href=&quot;http://ayende.com/blog/153701/ask-ayende-life-without-repositories-are-they-worth-living&quot;&gt;ask-ayende-life-without-repositories-are-they-worth-living&lt;/a&gt;

This could probably be talked about forever and ever and it depends on different applications. Whats I like to know,

1. would this approach be suited for a Entity Framework project?
2. using this approach is the business logic still going in a service layer, or extension methods (as explained below, I know, the extension method is using NHib session)?



**That&#39;s easily done using extension methods. Clean, simple and reusable.**


    public static IEnumerable GetAll(
        this ISession instance, Expression&lt;Func&lt;T, bool&gt;&gt; where) where T : class
    {
        return instance.QueryOver().Where(where).List();
    }

Using this approach and `Ninject` as DI, do I need to make the `Context` a interface and inject that in my controllers?

Content Type	Original Author	Original Content on Stackoverflow
Question	Kenci	View Question on Stackoverflow
Solution 1 - C#	Hamlet Hakobyan	View Answer on Stackoverflow
Solution 2 - C#	Yared T G	View Answer on Stackoverflow

Why does the ObjectStateManager property not exist in my db context?

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Case-insensitive string startswith in Python

How get value from LinkedHashMap based on index not on key?

Attributions