entity-framework-5

问题 Ok, I have been pulling out my hair because I simply cannot make a many to many relationship. I have the following two models: public class UserProfile { [Key] [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)] public int UserId { get; set; } public string UserName { get; set; } public string CompanyName { get; set; } public string FirstName { get; set; } public string Lastname { get; set; } public string EmailAddress { get; set; } public string PhoneNumber { get; set; } public

问题 Ok, I have been pulling out my hair because I simply cannot make a many to many relationship. I have the following two models: public class UserProfile { [Key] [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)] public int UserId { get; set; } public string UserName { get; set; } public string CompanyName { get; set; } public string FirstName { get; set; } public string Lastname { get; set; } public string EmailAddress { get; set; } public string PhoneNumber { get; set; } public

问题 I am using MVC first time, and I got this error when running the application. Here are my steps. Create a new MVC empty Project Install Entity framework 5.0.0 ( PM> Install-Package EntityFramework -Version 5.0.0 ) Add two classes in Model- MovieReview.cs and MovieReviewContext.cs . MovieReview Class is this And MovieReviewContext Class is this In Controllers folder I add a new Controller, named HomeController. Here is it . Then I run it on Google Chrome or on IE. And I got the error I

问题 Yesterday I posted a question about a issue related to entity framework version after installing MVC 4 on visual studio. Somehow visual studio is still pointing to the old version of the dll (4.3.1.0) eventhough I manualy set it in my reference to the new one I tried solution suggested by danielovich gacutil /u "EntityFramework, Version=4.3.1.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" But it did not find it No Assemblies Found Matching EntityFramework, Version=4.3.1.0, Culture

问题 In my project I use Entity Framework 4.4.0.0 and I have the following dilemma. I have to check if an user is activated. My query looks like: Any() _context.Users.Any(u => u.Id == userId && u.IsActivated); The generated sql is: SELECT CASE WHEN ( EXISTS (SELECT 1 AS [C1] FROM [dbo].[Users] AS [Extent1] WHERE ( [Extent1].[Id] = @p__linq__0 ) AND ( [Extent1].[IsActivated] = 1 )) ) THEN cast(1 AS BIT) WHEN ( NOT EXISTS (SELECT 1 AS [C1] FROM [dbo].[Users] AS [Extent2] WHERE ( [Extent2].[Id] = @p_

问题 After a code first migration, adding a user using the register fails with: Cannot insert the value NULL into column 'Discriminator', table 'aspnet-BSF2013-20130918101120.dbo.AspNetUsers'; column does not allow nulls. The create user code is the default code generated by the Project Template (Vs2013, MVC project with EF5) Before a successful migration, the Registration code worked, so I'm guessing that membership has been altered by EF. 来源： https://stackoverflow.com/questions/18938514/cannot

问题 After a code first migration, adding a user using the register fails with: Cannot insert the value NULL into column 'Discriminator', table 'aspnet-BSF2013-20130918101120.dbo.AspNetUsers'; column does not allow nulls. The create user code is the default code generated by the Project Template (Vs2013, MVC project with EF5) Before a successful migration, the Registration code worked, so I'm guessing that membership has been altered by EF. 来源： https://stackoverflow.com/questions/18938514/cannot

问题 I am using Entity Framework 5 RC and i have some code that require a specific table on the database. The entity is already created using Code-First. a) Is there a way to tell EF to create the table if its not already created in the database ? If yes.. how ? b) Also.. if the table already exist, can it handle entity changes such adding properties to the entity.. will it get reflected on the database ? (We still use the code-first approach here) Thanks! 回答1: Use code first migrations (either

问题 At work we just upgraded to Entity Framework 5. Our EDMX file now has a couple other nodes beneath it: EntityContainer.Context.tt which contains the generated DbContext object and EntityContainer.tt which contains the entities themselves. For a short period, adding an entity in EF was automatically regenerating the tt (T4 Templates) when we would save the EDMX file. Now all of a sudden we have to right-click the T4 templates and select "Run Custom Tool" to get them to regenerate the .cs files

问题 At work we just upgraded to Entity Framework 5. Our EDMX file now has a couple other nodes beneath it: EntityContainer.Context.tt which contains the generated DbContext object and EntityContainer.tt which contains the entities themselves. For a short period, adding an entity in EF was automatically regenerating the tt (T4 Templates) when we would save the EDMX file. Now all of a sudden we have to right-click the T4 templates and select "Run Custom Tool" to get them to regenerate the .cs files