entity-framework

问题 I am having a simple ViewModel which have something like this... ViewModel public class UserPostCommentViewModel { public virtual List<Comment> Comment { get; set; } public virtual User User { get; set; } public virtual Post Post { get; set; } } so that i can return a view which has 1 Post with the details 1 User details and Many Comments submitted by users.... POST [Key] [ScaffoldColumn(true)] public int PostID { get; set; } [Required(ErrorMessage="Required")] [StringLength(250)] public

问题 Entity Framework templates and menu items generate errors in Visual Studio 2010 Ultimate on 64-bit XP. The "Reverse Engineer Code First" menu item in Visual Studio tells me that version 4.0.0.0 of System.Data.Entity.dll cannot be found in the GAC, as do the item templates. I have run the 4.1 msi, and the 4.2 nuget. As a result I have versions of the dll in the following 7 locations: Windows\Microsoft.NET\Framework\v4.0.30319\ Windows\Microsoft.NET\Framework64\v4.0.30319\ Windows\Microsoft.NET

问题 I am having trouble casting one of my entities to IEntityWithRelationsships. I am using a lot the method for getting context from an entity, and it's been working fine so far. I thought that entity need only to have one or more relationships defined in Model and that's it. Here's little bit of my code: public ActionResult Update(StavkaDokumentaVM stavka) { if (ModelState.IsValid) { StavkaDokumenta st = AutoMapper.Mapper.Map<StavkaDokumenta>(stavka); db.StavkeDokumenta.Attach(st); db

问题 So I'm going through this tutorial that seems so simple but I can't seem to get it to work. http://msdn.microsoft.com/en-us/data/gg685489 This is the error I'm receiving when running my app: "Keyword not supported: 'name'." Now I've looked at other posts similar to mine and it seemed like the connection string was the issue. So I looked closely at but can't see any real differences. <add name="BBCommercialSolutionsEntities" connectionString="metadata=res://*/Models.BBCommercialSolutions.csdl

问题 In oracle I can do the following query: SELECT * FROM Tabl Tabb WHERE (tabb.Col1, tabb.Col2) IN ( (1,2), (3,4)) Consider I 've following entity: public class Tabb { public int Col1 {get; set; } public int Col2 {get; set; } // other props } and criteria class public class Search { public int Col1 {get; set; } public int Col2 {get; set; } } I need to write: public IEnumerable<Tabb> Select(IEnumerable<Search> s) { var queryable = this.context.Tabbs; return queryable.Where(\* some *\).ToList(); }

问题 In oracle I can do the following query: SELECT * FROM Tabl Tabb WHERE (tabb.Col1, tabb.Col2) IN ( (1,2), (3,4)) Consider I 've following entity: public class Tabb { public int Col1 {get; set; } public int Col2 {get; set; } // other props } and criteria class public class Search { public int Col1 {get; set; } public int Col2 {get; set; } } I need to write: public IEnumerable<Tabb> Select(IEnumerable<Search> s) { var queryable = this.context.Tabbs; return queryable.Where(\* some *\).ToList(); }

问题 I'm using EF6 Code First and here's a simple model which reproduces my issue: abstract class GeoInfo { public int Id { get; set; } public double CoordX { get; set; } public double CoordY { get; set; } } class PersonGeoInfo : GeoInfo { [Required] public Person Person { get; set; } } class CarGeoInfo : GeoInfo { [Required] public Car Car { get; set; } } class Person { public int Id { get; set; } public string Name { get; set; } public virtual PersonGeoInfo PersonGeoInfo { get; set; } } class

问题 I'm currently making a ticketing system using MVC4 Entity Framework. Relations between 3 classes User to Admin = 1:0...1 1 to 0 or 1 = Few users will have admin status but not all. Admin to Ticket = 1:*|1 to Many = Admins can be assigned with more than 1 ticket but one ticket can only be assigned to one admin User to Ticket = 1:*|1 to Many = Users can open multiple tickets but one ticket can only have one user. Here are what my current tables look like. My issue is why is my admin table

问题 I can’t add an object to the ObjectContext even though I’m convinced it is not attached and it is not associated with a different context I am using EF 4 with POCO objects. If I try _currentContext.ObjectStateManager.GetObjectStateEntry(entityIn) Then I get the error The ObjectStateManager does not contain an ObjectStateEntry with a reference to an object of type 'System.Data.Entity.DynamicProxies.OrderItem_7D361CB49D75AA90681B4BA3F924139ECB0FC1426E38E90C7B884A4E9CD777DF'. Fair enough it’s

问题 I am trying to come up with an edit action. See below for what i have so far. ViewModel: using System; using System.Collections.Generic; using System.ComponentModel.DataAnnotations; using System.Linq; using System.Web; using System.Web.Mvc; namespace GlobalUnitedSC.WebUI.Models { public sealed class CreateMensPlayerViewModel { //Player profile starts here [HiddenInput(DisplayValue=false)] public int MensTeamId { get; set; } [HiddenInput(DisplayValue = false)] public int PlayerId { get; set; }