对于我自己,我使用了一个强类型的通用会话对象,这个类在我的域项目中,包含我所有的域类。你应该看看这篇文章:http ://weblogs.asp.net/scottgu/archive/2010/07/16/code-first-development-with-entity-framework-4.aspx使用代码优先的方法。
希望能帮助到你!
这是我的 Session 类的代码:
public class EFSession : ISession
{
DbContext _context;
public EFSession(DbContext context)
{
_context = context;
}
public void CommitChanges()
{
_context.SaveChanges();
}
public void Delete<T>(System.Linq.Expressions.Expression<Func<T, bool>> expression) where T : class, new()
{
var query = All<T>().Where(expression);
foreach (var item in query)
{
Delete(item);
}
}
public void Delete<T>(T item) where T : class, new()
{
_context.Set<T>().Remove(item);
}
public void DeleteAll<T>() where T : class, new()
{
var query = All<T>();
foreach (var item in query)
{
Delete(item);
}
}
public void Dispose()
{
_context.Dispose();
}
public T Single<T>(System.Linq.Expressions.Expression<Func<T, bool>> expression) where T : class, new()
{
return All<T>().FirstOrDefault(expression);
}
public IQueryable<T> All<T>() where T : class, new()
{
return _context.Set<T>().AsQueryable<T>();
}
public void Add<T>(T item) where T : class, new()
{
_context.Set<T>().Add(item);
}
public void Add<T>(IEnumerable<T> items) where T : class, new()
{
foreach (var item in items)
{
Add(item);
}
}
/// <summary>
/// Do not use this since we use EF4, just call CommitChanges() it does not do anything
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="item"></param>
public void Update<T>(T item) where T : class, new()
{
//nothing needed here
}
}