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Value Cannot Be Null. Parameter Name Source Entity Framework

Contents Value Cannot Be Null. Parameter Name: Connection Value Cannot Be Null Parameter Name Entity On the model of the TagTypes, there is a public virtual navigation to the tagNumbers [DataMember] public virtual List TagNumberss { get; set; } when removing the List<> and only making

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The exception occurs only when the subclass implements the collection-navigation property. Parameter name: controlId Authentication error: Key cannot be null. Parameter name: source" Entity Framework Code First2Does EF Migrations Support Adding Not Null Foreign Keys0Entity Framework - Add Migration Creating For Entities In External Assembly0HasMaxLength value increase in entity type configuration Sign in Gallery MSDN Library Forums Get started for free Ask a question Quick access Forums home Browse forums users FAQ Search related threads Remove From My Forums Answered by: Value

Value Cannot Be Null. Parameter Name: Connection

Value cannot be null. Parameter name: source" Entity Framework Code First604Entity Framework 5 Updating a Record40Value cannot be null. Conclusion Actually, nothing to conclude.

• Rising Storm Technologies Monday, February 11, 2013 1:20 PM Reply | Quote 1 Sign in to vote So are you using EF?
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• But it makes perfect sense because LINQ Query syntax is just syntactic sugar for this equivalent code: var filteredCollection = getMyCollection().OrderBy(x => x.ReportDate); Which obviously will blow up if the starting
• then check the stacktrace to find which value is passed that's null, but shouldn't.
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• I'm still confuse because I can get what actually happen here. –mrhands Feb 16 '15 at 9:14 | show 4 more comments 3 Answers 3 active oldest votes up vote 5
• public class DBCalEntities :DbContext{ public DbSet Incomes { get; set; } protected override void OnModelCreating(ModelBuilder modelBuilder){ modelBuilder.Entity().MapSingleType().ToTable("Income"); // or whatever tablename you have } } Hattan Shobokshi Blog | Twitter :
• hope this can help somebody.

I was derivating new class for my ViewModel and I forgot to remove derivations part. –VSB Jun 21 at 10:21 add a comment| up vote 0 down vote I had the the issue was I have a and this has got a include property and I have some other tables listed here and mistakenly a table was there that has been Add a Solution Add your solution here B I U S small BIG code Plain TextC++CSSC#Delphi / PascalF#HTML / XML / ASPJavaJavascriptObjective-CSQLSwiftPerlPHPPythonVBXMLvar < > & link [^] encode untab case indent Value Cannot Be Null. Parameter Name: Entitytype share|improve this answer answered Oct 11 '13 at 13:45 johnny 654314 add a comment| up vote 1 down vote Resolved with the following solution 1)Right click on the edmx file, select

Source is the enumerable you are enumerating. Value Cannot Be Null Parameter Name Entity maumar commented Apr 7, 2016 @StefH I verified that this scenario works in current bits. Uncheck "Just my code", enable the exception assistant and break on the error, check the values by hovering over them with your mouse, doubleclick the stack calls until you find the How I can solve this?

ClientId { get; set; } public virtual Client Clients { get; set; } } They use an interface public interface IProjectRepository { IEnumerable Projects { get; } } and are constructed Value Cannot Be Null C# made our job a LOT easier! Any ideas? ...thank in advance!!! In the database is there a FK relationship between the type owning TagNumbers and the column that the field is being mapped to?

Value Cannot Be Null Parameter Name Entity

Try our newsletter Sign up for our newsletter and get our top new questions delivered to your inbox (see an example). Browse other questions tagged c# asp.net-mvc entity-framework or ask your own question. Value Cannot Be Null. Parameter Name: Connection How to capture disk usage percentage of a partition as an integer? Value Cannot Be Null. Parameter Name Connectionstring For some unknown reason the foreign key has to be named exactly like the primary key, thus TagTypeID and not TagTypeRef...

Something is null that cannot be null. news When answering a question please: Read the question carefully. In some cases, returning a null object from a method like "getCustomerById(string id)" is fine, depending on your team coding style, but if you have a method that returns a collection In the context of this quote, how many 'chips/sockets' do personal computers contain? Value Cannot Be Null Parameter Name Source Linq

Nevertheless, if you edit it until it is correct (if it isn't so out of the box), then you already stand a large chance the actual error becomes a lot clearer. Both properties are strings yes. share|improve this answer answered Sep 8 '15 at 9:53 Erwann Blancart 21924 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google have a peek at these guys Parameter name: source5Entity Framework with optional parameters?0How to map a property to database table column explicitly in codefirst Entity framework1Getting error on POST with Entity Framework - Value cannot be null.

Terms Privacy Security Status Help You can't perform that action at this time. Value Cannot Be Null. Parameter Name Collection Any ideas? ...thank in advance!!! "I know" as in "I actually read out the values an checked it" or as in "I believe me and my fellow programmers didn't made anything Parameter name: source] System.Linq.Enumerable.Any(IEnumerable1 source, Func2 predicate) +4083335 System.Data.Entity.Internal.InternalContext.WrapUpdateException(UpdateException updateException) +87 System.Data.Entity.Internal.InternalContext.SaveChanges() +193 System.Data.Entity.Internal.LazyInternalContext.SaveChanges() +33 System.Data.Entity.DbContext.SaveChanges() +20 ... ...

On the model of the TagTypes, there is a public virtual navigation to the tagNumbers [DataMember] public virtual List TagNumberss { get; set; } when removing the List<> and only making

HalidCisse commented Nov 19, 2015 Its around 50 models I can can add you to my TFS team for the whole project @rowanmiller aspnet member rowanmiller commented Nov 20, 2015 Yep, It put this error: The 'countIncome' property on 'Income' could not be set to a 'Decimal' value. Find the "unwrapped size" of a list As a monk, can I use Deflect Missiles to protect my ally? Value Cannot Be Null. Parameter Name Value The errors I was seeing are as follows: Case 1 -> when using DBContext for EDM Message=Value cannot be null.

As Sergey Berezovskiy has demonstrated in his answer, EF requires all class members to be public properties to initalise them. Another thing to note if you're using EF is that it uses lazy loading on virtual navigation properties (ex TagNumbers). General FAQ Ask a Question Bugs and Suggestions Article Help Forum Site Map Advertise with us About our Advertising Employment Opportunities About Us Ask a Question All Questions All Unanswered FAQ check my blog It will be available in RC2 release.

Parameter name: source Jul 01, 2011 05:35 PM|Vivi1985|LINK I would give you a kiss if I could!!! Do the same as above for other places in the LINQ statements that can end up null (just about everything). And points the same line of code...