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Internal .net Framework Data Provider Error 1025

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Casting LINQ expression throws “Internal .NET Framework Data Provider error 1025.” up vote 4 down vote favorite The following code: model.Items = dbQuery.Select(c => new Item { Total = c.Items.Count((Func)(t => t.Amount.HasValue)) }).ToArray(); Throws the following exception: Internal .NET Framework Data Provider error 1025. However the exact code minus the cast works: model.Items = dbQuery.Select(c => new Item { Total = c.Items.Count(t => t.Amount.HasValue) }).ToArray(); Note: dbQuery is just an EF ObjectQuery. The expected type for Count() is Func, and it's even verified by ReSharper that they're the same type by the fact that it grays the cast out, suggesting that it's not needed and they're functionally equivalent. However, the exception proves that they are not, in fact, functionally equivalent. Also, I did see this related question/answer, but Count() (in this case, anyway) will not accept an Expression>, so that doesn't work for me. c# linq entity-framework share|improve this question asked Jul 15 '14 at 18:12 Jerad Rose 7,8171050129 1 So why are you trying to add something that is designed to be useless, but that is resulting in your code not working at all. If it hurts when you do that, don't do that. –Servy Jul 15 '14 at 18:31 Did you try to cast to Espression> instead? –Alexander Galkin Jul 15 '14 at 18:37 @AlexanderGalkin He answers that right in the question. –Servy Jul 15 '14 at 18:39 @Servy I was trying to abstract the actual issue from the details in the interest of simplicity. But it boils down to the fact that I'm trying to reuse the logic in my (more complicated) expression, and storing this logic in a Func isn't working. But if I can get the above code to work, then I can get my more complicated actual problem solved. –Jerad Rose Jul 15 '14 at 18:46 @JeradRose No, you can't. The code that you've provided is something that could in theory work if the query provider were robust enough to expect it. Act

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to get around “Internal .NET Framework Data Provider error 1025.”? up vote 4 down vote favorite 1 I am using the Entity Framework 4.3, POCO, database first and I am getting the following error: Internal .NET Framework Data Provider error 1025. QUESTION: I think http://stackoverflow.com/questions/24765269/casting-linq-expression-throws-internal-net-framework-data-provider-error-1025 that my query expresses my intent but I seem to be hitting this error, so I am wondering if anyone knows how I could structure my query differently to get around this error? Here is the scenario... I have a SQL server 2008 database that has 2 tables - A and B: A AId (int - not null - identity - primary key) AName (nvarchar(10) - not null) B BId (int - not null - identity - primary key) SomeName (nvarchar(10) - not null) AId http://stackoverflow.com/questions/9513284/how-to-get-around-internal-net-framework-data-provider-error-1025 (int - not null - foreign key connecting to AId in the table A) I then define the context like so: public class DatabaseContext : DbContext { public DatabaseContext(string name) : base(name) { Configuration.AutoDetectChangesEnabled = false; As = Set(); Bs = Set(); } public DbSet As { get; private set; } public DbSet Bs { get; private set; } } And the entity classes like so: public class A { public int AId { get; set; } public string AName { get; set; } public virtual ICollection Bs { get; private set; } public void AddB(B b) { if (b == null) { throw new ArgumentNullException("b"); } if (Bs == null) { Bs = new List(); } if (!Bs.Contains(b)) { Bs.Add(b); } b.A = this; } } public class B { public int BId { get; set; } public A A { get; set; } public string SomeName { get; set; } } Now for the query... What I want is all of the As where every "B SomeName" is in the list of names supplied so I do this: var names = new[] {"Name1", "Name2"}; var ctx = new DatabaseContext("EFPlayingEntities"); var res = ctx.As.Where(a => a.Bs.Select(b => b.SomeName).All(names.Contains)); // Here I evaluate the query and I get: // Internal .NET Framework Data Provider error 1025. Console.WriteLine(res.Count()); To be clear about what I mean, if the table data looks like this: AId,AName 1,A1 2,A2 3,A3 4,A4 BId,SomeName,AId 1,Name1,1 2,Name2,1 3,Name1,2 4,Name1,3 5,Name3,3 6,Name1,4 7,Name2,4 I would expect to get back A1, A2 and A4

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the http://stackoverflow.com/questions/24461017/why-am-i-getting-internal-net-framework-data-provider-error-1025-when-passing-m company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Why am I getting Internal .NET Framework Data Provider error 1025 when passing Method to where? up vote 0 down vote internal .net favorite I have a method that takes a generic TEntity which is overriden. It's signature is as follows: public virtual Expression> ProjectFilter(params TEntity[] objs) { return (p) => objs.Select(o => o.ID).Contains(p.ID); } I then filter a query based on this: from p in db.SomeDbSet where db.AclProjects.Where(ProjectFilter(p)).Any() select p This results in a 1025 error. (note that it doesn't matter what the body of the ProjectFilter is, the error still occurs. Any ideas internal .net framework why? Thanks! entity-framework entity-framework-6.1 share|improve this question edited Jun 28 '14 at 10:09 asked Jun 27 '14 at 21:27 James Hancock 8291625 Not many people will be challenged to analyze unfinished code. Try to return something meaningful first. –Gert Arnold Jun 27 '14 at 23:14 Like what did I miss? I can't provide the real code, thus I wrote a sample that reproduces the issue. The body of Project Filter is a simple one line (p) => p.X = obj.X and nothing more. –James Hancock Jun 28 '14 at 10:08 add a comment| active oldest votes Know someone who can answer? Share a link to this question via email, Google+, Twitter, or Facebook. Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Browse other questions tagged entity-framework entity-framework-6.1 or ask your own question. asked 2 years ago viewed 57 times Blog Stack Overflow Podcast #91 - Can You Stump Nick Craver? Related 18Passing func as parameter in Linq to Entities and 'Internal .NET Framework Data Provider error 1025' error9Entity Framework BuildCon

 

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