ef-code-first

问题 I'm using EF 5.0 (CodeFirst) with VS 2012 and am having trouble making a query using SqlQuery. The problem happens in the mapping between the property name of the entity and the name of the column in the database. My entity (model): [Table("Teste")] public class TesteEntity { [Column("Teste_Id")] public int Id { get; set; } [Required] public bool IsAdministrator { get; set; } [Required] public string Name { get; set; } } When I run the query, I get an error. Rotine: List<TesteEntity> list =

问题 I'm using EF 5.0 (CodeFirst) with VS 2012 and am having trouble making a query using SqlQuery. The problem happens in the mapping between the property name of the entity and the name of the column in the database. My entity (model): [Table("Teste")] public class TesteEntity { [Column("Teste_Id")] public int Id { get; set; } [Required] public bool IsAdministrator { get; set; } [Required] public string Name { get; set; } } When I run the query, I get an error. Rotine: List<TesteEntity> list =

问题 So I build my asp.net web project using MVC and it's working fine in localhost using code-first approach of EntityFramework 6.0. This week I bought a new Web Hosting to upload my website. The problem is that, everytime I run the website it tries to create a database in database 'master', why is this happening? I am selecting the right database that my Web Hosting provided on my ConnectionString. There is a note: I am also using ASP Identity OWIN... maybe that's the problem? it's using another

问题 I'm using EF Code First with SQL Express 2012. Everything worked fine until now. I'm getting this error: DeleteDatabase is not supported by the provider. public class SqlServerContext : DbContext { public DbSet<Estimate> Estimates { get; set; } public SqlServerContext(String connectionString) :base(connectionString) { Database.SetInitializer(new SqlServerContextInitializer()); } } public class SqlServerContextInitializer : DropCreateDatabaseAlways<SqlServerContext> { } Did anyone have similar

问题 I was thinking that is there any way to determine the order of property loading in CodeFirst,for example i have a class like below: public Class { public string Propert1{get;set;} public string Propert2{get;set;} public List<string> PropertList{get;set;} } And i need to make EF to load ProprtyList before property1!(Because i manipulate ProprtyList Values On Property1_Changed). 回答1: A property should be just that: a property. I.e. you get or set it and nothing else, no side effects . I know

问题 Well, it is 1st time i am trying to create 1-1 relationship between two tables using code first. I took some help online and come across the following classes mapping. Than I ran migration and found something wrong. E.g. The migration says that primary key for StudentDetails is Id from Student table whereas I am looking to have primary key StudentId. Also, the foreign key is being created in opposite way. Please can someone highlight what is wrong here or is it me who perceived it wrong. I

问题 I am building a SAAS application and planned for one database per client. I am using Code First EF6 with ASP.Net MVC 4. There will be 2 context i.e. MasterContext and TenantContext. User will first hit to MasterContext to authenticate user credentials and fetch its Tenant configuration. Based on fetched Tenant configuration; TenantContext is set to Tenant specific database and used for Tenant CRUD operations. Please advice how to achieve this. 回答1: The idea is to identify the current request

问题 I have a Generic Repository class using code first to perform data operations. public class GenericRepository<T> where T : class { public DbContext _context = new DbContext("name=con"); private DbSet<T> _dbset; public DbSet<T> Dbset { set { _dbset = value; } get { _dbset = _context.Set<T>(); return _dbset; } } public IQueryable<T> GetAll() { return Dbset; } } I have an entity class Teacher, which maps to an existing table "Teacher" in my database, with exactly the same fields. public class

问题 I have a Generic Repository class using code first to perform data operations. public class GenericRepository<T> where T : class { public DbContext _context = new DbContext("name=con"); private DbSet<T> _dbset; public DbSet<T> Dbset { set { _dbset = value; } get { _dbset = _context.Set<T>(); return _dbset; } } public IQueryable<T> GetAll() { return Dbset; } } I have an entity class Teacher, which maps to an existing table "Teacher" in my database, with exactly the same fields. public class

问题 Using asp.NET MVC3, I am creating trying to create an abstract class/model with the following: namespace core.Models.Concrete { public class item { [Key] public Guid id { get; set; } public Type ConcreteType { get; set; } public itemtype Type { get; set; } public string barcode { get; set; } public int rating { get; set; } public string Title { get; set; } } } public enum itemtype { Game, Book, Film } Which is used by: namespace core.Models.Abstract { public class game : item { public