ef-code-first

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How to do following in Entity Framework 4.1 using Linq

Assume the above given data model, how to execute following query in EF 4.1 Select students.firstname ,students.lastname[详细]

2023-04-04 04:24 分类：问答
How to map different navigation properties in TPH types to the same table?

I have this existing databse schema which implies self-reference many-to-many relationship using a joint table. The Location table may contain information Country, City, District, or Area according to[详细]

2023-04-04 03:53 分类：问答
Sorting Collection of One-To-Many relationship - Entity Framework Codefirst

I have a codefirst entity model which has two entities, City and Locality. City has one to many relation with Locality. Here is how they are related.[详细]

2023-04-04 00:45 分类：问答
Entity Framework 4.1 The provider did not return a ProviderManifestToken string Exception

I downloaded theAsp.NET MVC 3 EntityFramework Code first sample application in vb.netand modified the connection string as I don\'t have SQL Server Express Edition to try it with Sql Server 2008 Web E[详细]

2023-04-03 17:42 分类：问答
Miniprofiler 1.9.1 throws Unable to determine the provider name for connection of type 'System.Data.SqlClient.SqlConnection' with EF Code First

I know I am probably being a bit thick however...... Created a new MVC3 test application using EF code first.[详细]

2023-04-03 11:16 分类：问答
How to add unique non primary-key field to entity using Entity Framework 4.1?

We are us开发者_高级运维ing Entity Framework 4.1 Code first. We\'ve got user entity with primary key set to UserId and need UserLogin to be unique. How can it be done?Entity Framework does not suppor[详细]

2023-04-03 05:09 分类：问答
asp.net mvc 3 validation for Id field with EF code first

I have the following model: public class Product { [Key] [HiddenInput(DisplayValue = false)] public int Id { get; set; }[详细]

2023-04-03 03:43 分类：问答
DbContext SaveChanges Order of Statement Execution

I have a table that has a unique index on a table with an Ordinal column.So for example the table will have the following columns:[详细]

2023-04-03 00:32 分类：问答
Entity Framework 4.1 cannot create MySQL database

I have a WPF application in which I\'m trying to use Entity Framework 4.1 Code First for Data Access Logic. I\'m using MySQL as DBMS. For simplicity I have created just one data class User:[详细]

2023-04-02 20:05 分类：问答
Remove Dependent Entity When Relationship Deleted

Say I have two entities like so: public class Response { public int Id { get; set; } public int PatientId { get; set; }[详细]

2023-04-02 19:32 分类：问答