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Value Cannot Be Null C#

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countIncome is a float in my class and a money in may database table... Parameter name: source Jul 01, 2011 04:45 PM|CodeHobo|LINK DBCalEntities needs to inherit from the DbContext Class public class DBCalEntities : DbContext { public DbSet Incomes { get; set; } } Edit: string description = itmss.Item.Description.ToString(); // isn't Description already a string? Can one bake a cake with a cooked egg instead of a raw one? check over here

Columns in TagNumber Table: CREATE TABLE [dbo].[TagNumbers]( [TagNumberID] [int] IDENTITY(1,1) NOT NULL, [TagSerialNumber] [nvarchar](100) NOT NULL, [TagTypeRef] [int] NOT NULL, [CoreUserRef] [int] NOT NULL, [DateStamp] [datetime] NOT NULL, CONSTRAINT [PK_TagNumbers] PRIMARY Mysterious creeper-like explosions How is True < 2 implemented? For some unknown reason the foreign key has to be named exactly like the primary key, thus TagTypeID and not TagTypeRef... Privacy Statement| Terms of Use| Contact Us| Advertise With Us| CMS by Umbraco| Hosted on Microsoft Azure Feedback on ASP.NET| File Bugs| Support Lifecycle http://stackoverflow.com/questions/16281133/value-cannot-be-null-parameter-name-source

Value Cannot Be Null C#

Value cannot be null. var db = new hublisherEntities(); establishment_brands est = new establishment_brands(); est.brand_id = 1; est.establishment_id = 1; est.price = collection["price"]; est.size = collection["size"]; db.establishment_brands.Add(est); db.SaveChanges(); This gives me an error of Value countIncome { get; set; } public DateTime? List lista = (w2.obterPacotePosicoes("user", "password", 0) ??

Join them; it only takes a minute: Sign up Using LINQ to find item in a List but get “Value cannot be null. By that I mean that you replace this: select new { SaleID = sale.OrderID, LineItem = GetLineItem(sale.LineItems) }; with something like this: select new { SaleID = 123, LineItem = GetLineItem(new Not the answer you're looking for? Value Cannot Be Null Parameter Name String 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

Value cannot be null. Value Cannot Be Null. Parameter Name Collection Parameter name: source in Asp.net0Value cannot be null, r nparameter name source Hot Network Questions How do I calculate passive perception for a monster? Thanks, Shawn Reply ignatandrei All-Star 119105 Points 27494 Posts ModeratorMVP Re: Value cannot be null. http://stackoverflow.com/questions/3244336/using-linq-to-find-item-in-a-list-but-get-value-cannot-be-null-parameter-name Note, LinqPad has a compatibility option if you want it to generate a model like that, but probably doesn't do this by default, which might explain it doesn't give you the

What is your db schema? –Ash Burlaczenko Apr 29 '13 at 14:27 You might want to look into this question and its answers: stackoverflow.com/questions/3244336/… –Ville Salonen Apr 29 '13 Value Cannot Be Null Parameter Name Input Value cannot be null. Sign in Email Address Password I forgot my password Sign in Products Evoq Content Overview Content Creation Workflow Asset Management Mobile Responsive Personalization Content Analytics SEO Integrations Security Website PerformanceEvoq Engage Overview Community Management  Dashboard  Analytics  Member Profile Gamification Advocate Marketing Community Engagement  Ideas  Answers  Discussions  Groups  Wikis  Events Mobile ReadyEvoq Intranet Governance Employee Portal Collaboration Gamification User Profiles Personalization Document Management Analytics IntegrationsEvoq: CMS FeaturesEvoq Why does Friedberg say that the role of the determinant is less central than in former times?

Value Cannot Be Null. Parameter Name Collection

asked 3 years ago viewed 87747 times active 5 months ago Visit Chat Linked 17 Using LINQ to find item in a List but get “Value cannot be null. http://www.codeproject.com/Questions/1046321/Value-cannot-be-null-Parameter-name-source Parameter name: source". Value Cannot Be Null C# Optional Password I have read and agree to the Terms of Service and Privacy Policy Please subscribe me to the CodeProject newsletters Submit your solution! Value Cannot Be Null. Parameter Name Source Entity Framework In addition to our commercial CMS and social community solutions, DNN is the steward of the DotNetNuke Open Source Project.

But if those database columns are null for a particular row, you will get an error unless your model has a nullable type. check my blog How small could an animal be before it is consciously aware of the effects of quantum mechanics? I never had the same name for any PK and FK. public void AddUserRole(int id, int userId) { Role role = db.Roles.Find(id); User user = db.Users.Find(userId); if (!role.Users.Contains(user)) { role.Users.Add(user); db.SaveChanges(); } } John C Rayan 3-Nov-15 10:22am Uncomment id Value Cannot Be Null. Parameter Name Value

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Why are Squibs not notified by the Ministry of Magic If I receive written permission to use content from a paper without citing, is it plagiarism? But if LINQ fails and gives you such headaches and such unreadable or hard-to-debug code, consider what would happen with the next problem you encounter? this content 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

What you should look for is a value that becomes null and prevent that. Value Cannot Be Null. Parameter Name Viewinfo I've found the solution thanks to you guys! My schema looks like every column can be null. –danielovich Apr 29 '13 at 14:34 1 Could you post your connection string? –anaximander Apr 29 '13 at 14:37 add a

Now I do not know which one of your posts to mark as the answer hehe Thank you very much!!!!!!!

Source is the enumerable you are filtering –Sergey Berezovskiy Feb 16 '15 at 9:09 @mrhands Check if ListMetadataKor is null or not . –Suraj Singh Feb 16 '15 at For demonstration below code will result in such an exception. 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 Value Cannot Be Null. Parameter Name Source Mvc This may be an issue for any other methods on DbSet as well.

Parameter name: source in linq?0Value cannot be null, r nparameter name source Hot Network Questions Word for "using technology inappropriately"? Value cannot be null. Rising Storm Technologies Monday, February 11, 2013 11:00 AM Reply | Quote Answers 2 Sign in to vote Note that empty is quite a bit different than null. have a peek at these guys While that produces a better program, it's not good for the challenge.

Not the answer you're looking for? I guess you must be calling it from some other view. I was chasing my tail for this error almost 2 days and was always thinking something big and looking for the classes that might be the issue and finally i found Since your DbSet is defined as (DbSetIncomes), EF is expecting a table called Incomes.

What is really curved, spacetime, or simply the coordinate lines? Empty is fine. Remove User_Id parameter from the Edit post action and check the FormCollection to see if you see the hidden field User_Id Member 10740412 3-Nov-15 8:13am now i tried this Parameter name: source?30Value cannot be null.

share|improve this answer edited Jan 18 at 9:11 answered Apr 29 '13 at 14:32 Martin Mulder 8,22721037 2 This solved the problem to me, I suspect this is the solution Singular cohomology and birational equivalence What did John Templeton mean when he said that the four most dangerous words in investing are: ‘this time it’s different'? Any Ideas? Michael Taylor - 2/11/2013 http://msmvps.com/blogs/p3net Marked as answer by linkit Tuesday, February 12, 2013 8:14 AM Monday, February 11, 2013 3:05 PM Reply | Quote Moderator All replies 0 Sign in

So I've finnaly figured out where exactly it comes from... Parameter name: source [Answered]RSS 8 replies Last post Jul 01, 2011 05:56 PM by CodeHobo ‹ Previous Thread|Next Thread › Print Share Twitter Facebook Email Shortcuts Active Threads Unanswered Threads Unresolved but sometimes in other computer it doen't work. Then the debugger will break inside the .NET method if it isn't your own.

That either happens because you want to allow the Garbage Collector (GC) to recycle that memory or because you have some binding/automatic representation and want to clean the slate: string someText