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Value Cannot Be Null. Parameter Name Source Entity Framework


Monday, February 11, 2013 1:12 PM Reply | Quote 0 Sign in to vote I did read the values and checked it, all the data is correct... Isn't AES-NI useless because now the key length need to be longer? Are keywords in resolv.conf case sensitive? In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms his comment is here

countIncome { get; set; } public DateTime? Thanks in advance. 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 2 Sign in to vote Not the answer you're looking for?

Value Cannot Be Null. Parameter Name: Connection

How to reduce the width of the equation in a text paragraph? How can this be fixed? The exception occurs only when the subclass implements the collection-navigation property.

  1. And points the same line of code...
  2. aspnet member rowanmiller commented Apr 4, 2016 @StefH thanks for the fantastic bug report...
  3. thanks!
  4. Parameter name: source” up vote 17 down vote favorite 7 When using LINQ to get data from a list I encounter this error.
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If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Parameter name: source”1LINQ Entity Framework Value cannot be null. Nothing against LINQ, I love it, but in this particular case, let it rest, fix it with a simple loop and revisit it in half a year or so. Value Cannot Be Null. Parameter Name: Entitytype Insults are not welcome.

This is assigned to someone from our team to be fixed. Value Cannot Be Null Parameter Name Entity 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 Another test you could do is to look at the value of TagNumbers (in the debugger) immediately after running the initial query. So when I open again it happens.

When you declare a Referencec type it starts implictily as "null": string noText; //implictly null When you have a Reference type and want it to stop referencing anything you assign it Value Cannot Be Null C# Parameter name: source Jul 01, 2011 05:47 PM|Vivi1985|LINK How many problems in a single line!!!!! When have public fields ever been okay???? –Nick Williams Jul 2 '13 at 15:33 @PetePetersen I've added code which shows why simple fields will not be initialized –Sergey Berezovskiy dateIncome { get; set; } } Hattan Shobokshi Blog | Twitter : @Hattan Reply Vivi1985 Member 38 Points 92 Posts Re: System.ArgumentNullException!!!

Value Cannot Be Null Parameter Name Entity

Consider the following samples: var filteredCollection = from item in getMyCollection() orderby item.ReportDate select item; This code is not NULL SAFE, meaning that if getMyCollection() returns a null, you'll get the Conclusion Actually, nothing to conclude. Value Cannot Be Null. Parameter Name: Connection smitpatel modified the milestone: 7.0.0-rc2, 7.0.0 Nov 26, 2015 smitpatel added the 2 - Done label Nov 26, 2015 smitpatel closed this Nov 26, 2015 This was referenced Feb 18, 2016 Value Cannot Be Null. Parameter Name Connectionstring OBDII across the world?

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 this content How to handle swear words in quote / transcription? The connection string is the same as in the app.config except that it has added 'Application Name=EntityFrameworkMUE' –Nick Williams Jul 2 '13 at 15:25 However productDb -> base -> Find a mistake in the following bogus proof MathSciNet review alert? Value Cannot Be Null Parameter Name Source Linq

Any ideas? ...thank in advance!!! So, instead of fields public DbSet AProducts; You should use properties public DbSet AProducts { get; set; } Because Entity Framework looks for properties. Understand that English isn't everyone's first language so be lenient of bad spelling and grammar. weblink This may be an issue for any other methods on DbSet as well.

Parameter name: source var nCounts = from sale in sal select new { SaleID = sale.OrderID, LineItem = from sli in sale.LineItems group sli by sli.Item into ItemGroup select new { Value Cannot Be Null. Parameter Name Collection Why is the 'You talking to me' speech from the movie 'Taxi Driver' so famous? Your Email Password Forgot your password?

Console.WriteLine("Hello World"); IEnumerable list = null; list.Where(d => d ==4).FirstOrDefault(); Here is output of above code.

Just check all references to this list in your code and look for assignments. Thanks a lot :D –mrhands Feb 17 '15 at 1:05 | show 2 more comments up vote 3 down vote Value cannot be null. Always always always use an if check, the null coalescing operator, or some other switch to return an empty array/list/enumerable etc, so that consumers of your method can freely LINQ over Value Cannot Be Null. Parameter Name Value Parameter name: source StackTrace: at System.Linq.Queryable.Any[TSource](IQueryable`1 source, Expression`1 predicate) at ietCCHPluginsCampaign.ViewModels.EditCampaign.EditCampaignViewModel.RefreshScheduleTypes() in D:\Trunk\Projects\CCH\Plugins.Campaign\iet.CCH.Plugins.Campaign\ViewModels\EditCampaign\EditCampaignViewModel.vb:line 415 at ietCCHPluginsCampaign.ViewModels.EditCampaign.EditCampaignViewModel.OnViewLoaded(Object view) in D:\Trunk\Projects\CCH\Plugins.Campaign\iet.CCH.Plugins.Campaign\ViewModels\EditCampaign\EditCampaignViewModel.vb:line 281 at Caliburn.Micro.Screen.<>c__DisplayClass12.b__11(Object , RoutedEventArgs ) Source of this error comes from

public class DurationExtended : Duration { } This happened during work in progress. What you should look for is a value that becomes null and prevent that. Please click the link in the confirmation email to activate your subscription. http://bovbjerg.net/value-cannot/value-cannot-be-null-parameter-name-source.php 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

Join them; it only takes a minute: Sign up Using LINQ to find item in a List but get “Value cannot be null. Hate myself quite a bit right now. 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 I can confirm that EachScheduleType is not null and it's value is being set.

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