问题描述
我正在编写一个简单的博客应用程序,并尝试在我的通用存储库模式中建立CRUD操作,但是我的更新方法出现错误:I后跟一个如何假 Entry()通过在DbContext上添加附加的间接级别。但是在MVC 5中,我们继承自: IdentityDbContext ,而不是DbContext。我确实尝试实现作者修复,但错误仍然存在。
我的问题
如何添加更新方法到Entity Framework 6中使用IdentityDbContext的存储库?如果我们不应该这样做,那么如何更新这个模式的记录?
我应该注意,所有其他方法都按照预期工作。
我的通用存储库:
公共类BlogEngineRepository< T> :IRepository< T>其中T:class
{
protected DbSet< T> DbSet;
public BlogEngineRepository(DbContext dataContext)
{
DbSet = dataContext.Set&T;();
}
#region IRepository< T>成员
public void Insert(T entity)
{
DbSet.Add(entity);
}
public void Delete(T entity)
{
DbSet.Remove(entity);
}
public void Update(T entity)
{
DbSet.Entry(entity).State = System.Data.Entity.EntityState。改性;
}
public IQueryable< T> SearchFor(Expression< Func< T,bool>>谓词)
{
return DbSet.Where(predicate);
}
public IQueryable< T> GetAll()
{
return DbSet;
}
public T GetById(int id)
{
return DbSet.Find(id);
}
#endregion
}
更新应该是():
$[ValidateInput(false)]
public ActionResult Edit([Bind( Include =Id,Title,IntroText,Body,Modified,Author)]帖子)
{
using(UnitOfWork uwork = new UnitOfWork())
{
post。 Modified = DateTime.Now;
uwork.PostRepository.Update(post);
uwork.Commit();
return RedirectToAction(Index);
}
}
RepositoryPattern如下所示:
public class BlogEngineRepository< T> :IRepository< T>其中T:class
{
public BlogEngineRepository(DbContext dataContext)
{
DbSet = dataContext.Set&T;();
Context = dataContext;
}
public T Update(T entity)
{
DbSet.Attach(entity);
var entry = Context.Entry(entity);
entry.State = System.Data.EntityState.Modified;
}
}
I'm writing a simple blog application and trying to establish CRUD operations in my generic repository pattern but I'm getting an error on my update method that says:
I followed a post that explained how to 'fake' Entry() by adding additional level of indirection over DbContext. However in MVC 5 we're inheriting from: IdentityDbContext and not DbContext. I did try implementing the authors fix but the error persists.
My Question
How can I add an update method to my repository in Entity Framework 6 using IdentityDbContext? If we aren't supposed to do it this way then how do I update a record with this pattern?
I should note that all other the other methods work as expected.
My generic Repository:
public class BlogEngineRepository<T> : IRepository<T> where T : class
{
protected DbSet<T> DbSet;
public BlogEngineRepository(DbContext dataContext)
{
DbSet = dataContext.Set<T>();
}
#region IRepository<T> Members
public void Insert(T entity)
{
DbSet.Add(entity);
}
public void Delete(T entity)
{
DbSet.Remove(entity);
}
public void Update(T entity)
{
DbSet.Entry(entity).State = System.Data.Entity.EntityState.Modified;
}
public IQueryable<T> SearchFor(Expression<Func<T, bool>> predicate)
{
return DbSet.Where(predicate);
}
public IQueryable<T> GetAll()
{
return DbSet;
}
public T GetById(int id)
{
return DbSet.Find(id);
}
#endregion
}
Update should look like (expanding on Dan Beaulieu's answer) :
[HttpPost]
[ValidateAntiForgeryToken]
[ValidateInput(false)]
public ActionResult Edit([Bind(Include = "Id,Title,IntroText,Body,Modified,Author")] Post post)
{
using (UnitOfWork uwork = new UnitOfWork())
{
post.Modified = DateTime.Now;
uwork.PostRepository.Update(post);
uwork.Commit();
return RedirectToAction("Index");
}
}
RepositoryPattern looks like this:
public class BlogEngineRepository<T> : IRepository<T> where T : class
{
public BlogEngineRepository(DbContext dataContext)
{
DbSet = dataContext.Set<T>();
Context = dataContext;
}
public T Update(T entity)
{
DbSet.Attach(entity);
var entry = Context.Entry(entity);
entry.State = System.Data.EntityState.Modified;
}
}
这篇关于使用实体框架使用存储库模式更新记录6的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!