entity-framework-6

Hi I am following up on this question here and working through a proof of concept for a SPA using our Company database data from a series of examples / articles Using Web API 2 with Entity Framework 6 Unfortunately, when I run the project I get this return This feels like a failure to retrieve the data from the SQL Database (SQL Server 2008R2). However I am getting no error message, which I though I would, I know the data view is there as I have checked in SQL Management studio and in Server Explorer of Visual Studio 2017. I am guessing though it could also be an error mapping my Data transfer

I encounter exception error below when i try to add a new entry in the database with : db.patient_visit.Add(pv); db.SaveChanges(); An exception of type 'System.InvalidOperationException' occurred in project.dll but was not handled in user code Additional information: project.Models.tableName:The field pvid must be a string or array type with a maximum length of '20'. Before this, my model is automatically and originally set like below because i did Code-First migration with existing database. [Key] [StringLength(20)] public string pvid { get; set; } Logically, it looks like it is already in

I need to create a generic way to add missing languages entries to all entities in which implements an specific interface. I found out how to get my collection property, but I still don't know how to add new values on it before proceed to save. Following a piece of my public override int SaveChanges() handling. foreach (var translationEntity in ChangeTracker.Entries(<ITranslation>)) { if (translationEntity.State == EntityState.Added) { var translationEntries = translationEntity.Entity.GetType() .GetProperties(BindingFlags.Public | BindingFlags.Instance) .Where(x => x.CanWrite && x.GetGetMethod

I am having this strange behavior all of a sudden (i have compared my files in version control (tfs) to be sure i did not change anything and i didn't found anything different). I am seeding my database with some metadata and i see that it has a very strange behavior i never saw before. I am inserting a Entity "Product" and it inserts this entity 2 times , first insert is correct and has everything it should have, the other one has NULL properties (string values) but some (like datetimes) have values. I have totally no clue why this is happening, it is occurring when i call the base.Seed(ctx);

I have installed VS2013 but still have VS2012. In VS2013 I cannot generate a database from a model in Entity Framework. I get the following error message: The files in the error message do exist! Does anyone have any idea how I can fix this? Your tip about checking the drive made me see what I should have seen before. The environment variable VS120COMNTOOLS had the wrong drive letter. Can't remember, but I initially installed VS2013 on another drive and then changed it back to C. Anyway setting it correctly fixed the problem. /Peter Pawel I believe VS is not updating the VS120COMNTOOLS

I'm reviewing some code that was written in the EF 4 days because it stands out during performance benchmarking. The purpose of the code is to materialize an ICollection<MyBaseClass> using Entity Framework (we're now on EF 6.1). The code exists because references present in specific subclasses aren't materialized when retrieving public Parent { public virtual ICollection<MyBaseClass>() Base { get; set; } } from the database, when the actual types stored are subclasses of MyBaseClass. Example subclass: public SubA : MyBaseClass { public virtual ICollection<Options> Ref1 { get; set; } }

Creating the simplest project (In visual studio 2013 -> asp.net web application -> MVC authentication with individual accounts), it works perfectly on localhost. However, when sending to the server (medium trust level), the project does not work when I try to enter login. See the error image: http://s18.postimg.org/fm2qw8gzt/print.png I tried to include on assembly.cs [assembly: AllowPartiallyTrustedCallers]. It did not work. I have created a strong name key. It did not work. The server does not support level = full trust. Do not believe there need to be full, because few asp.net mvc 5 sites

if I have the following models, am I using the InverseProperty correctly? class Person { public int PersonID {get;set;} [InverseProperty("Person")] public List<Hobbies> Sports {get;set;} [InverseProperty("Person")] public List<Hobbies> Art {get;set;} [InverseProperty("Person")] public List<Hobbies> Reading {get;set;} } abstract class Hobbies { public int HobbiesID {get;set;} public string HobbyName {get;set;} public int HobbyRating {get;set;} public int PersonID {get;set;} public Person Person {get;set;} } class Sports : Hobbies {} class Art : Hobbies {} class Reading : Hobbies {} this works