entity-framework

问题 I would like to suppress these warnings but I could not figure out how to do it. 回答1: Those are not warnings you are seeing, those are Errors. The output tells you very clearly when a diagnostic message is a warning or an error. You've given the compiler an error number (6002) and told it to suppress the warning with that number, but such a warning does not exist. So, you've only succeeded in creating an additional error In this case, the message you're trying to suppress is a fatal compiler

问题 I would like to suppress these warnings but I could not figure out how to do it. 回答1: Those are not warnings you are seeing, those are Errors. The output tells you very clearly when a diagnostic message is a warning or an error. You've given the compiler an error number (6002) and told it to suppress the warning with that number, but such a warning does not exist. So, you've only succeeded in creating an additional error In this case, the message you're trying to suppress is a fatal compiler

问题 I am using jQuery datatable (http://www.datatables.net) in my MVC4 app and as you may know this table allows server side processing. I am going to use the table in multiple views tied to multiple controllers so I'd like to implement a generic way to filer, sort and page data without the need to write a method for each controller. If I were to do that, they would all look the same but they would target a different entity from the database and be doing textual filtering and sorting on different

问题 I have been reading that Repositories should return domain objects only. I am having difficulty with implementing this. I currently have API with Service Layer, Repository and I am using EF Core to access sql database. If we consider User(Id, Name, address, PhoneNumber, Email, Username) and Orders (id, OrderDetails, UserId) as 2 domain objects. One Customer can have multiple Orders. I have created navigation property public virtual User User{ get; set; } and foreign Key. Service layer needs

问题 I have never experienced this before. SSMS is displaying data tables incorrectly. SSMS seems to be locked into some previous query result and I don't see how to clear it. I have an application (MVC) that interfaces to an SQL server. When I run the application's database data delete function, the application shows the table to be empty. But SSMS still shows data in the table. If I then run the application's database seed function, the application shows the table to be re-loaded and I can tell

问题 After much of googling I have come to three conclusion that until MVC 4 ( entity framework), that FILESTREAM (of Sql server) is not supported directly. Is there a work around for the same? 回答1: Unfortunatelly, there is no equivalent of FILESTREAM in EF 6, that could be used with Code First approach. There is a workaround I found today, but haven't tried myself yet, though: http://ignoringthevoices.blogspot.co.uk/2014/01/working-with-entity-framework-code.html Basicaly, you need to use

问题 I am having issues regarding one to one relationship in entity framework database first. I have two tables, a user table and a user details table. user would consist of login info, username, date registered and the userDetails would have information such as contact information, website, etc. In my database My user.id references userdetails.userId. Both are primary keys. So for example.. User: Id [Primary Key (incremented)] Password Salt RegisteredDate UserDetails UserId [Primary Key

问题 I have a table like the following: [Table("tblStore")] public class Store { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public Guid Id { get; set; } [Required] public string Name { get; set; } [Required] public string Option1 { get; set; } [Required] public string Option2 { get; set; } [Required] public DateTime Created { get; set; } } I need to enforce that either Option1 or Option2 be specified (not null). Can someone please suggest a way to do that with EF 6? 回答1: You can

问题 I have a table like the following: [Table("tblStore")] public class Store { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public Guid Id { get; set; } [Required] public string Name { get; set; } [Required] public string Option1 { get; set; } [Required] public string Option2 { get; set; } [Required] public DateTime Created { get; set; } } I need to enforce that either Option1 or Option2 be specified (not null). Can someone please suggest a way to do that with EF 6? 回答1: You can

问题 I have a table like the following: [Table("tblStore")] public class Store { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public Guid Id { get; set; } [Required] public string Name { get; set; } [Required] public string Option1 { get; set; } [Required] public string Option2 { get; set; } [Required] public DateTime Created { get; set; } } I need to enforce that either Option1 or Option2 be specified (not null). Can someone please suggest a way to do that with EF 6? 回答1: You can