我在网上找了个EF的EntityRepository,自己改了改，在实际使用中发现，不能更新指定的字段，我想自己写一个方法，但总是报错。刚学EF请大能之士，帮我看看。指点一二呀。
这是我的代码，最后一个方法是我写的方法，总是报错。
namespace Model.EF
{
public class EntityRepository<TEntity> : IRepository<TEntity>
where TEntity : class, IEntity
{
private readonly NerdDinners m_dbContext;
private ObjectContext context;
public EntityRepository()
{
m_dbContext =new NerdDinners();
}
protected virtual void OnLoaded(TEntity entity)
{
}
protected DbSet<TEntity> DbSet
{
get { return m_dbContext.Set<TEntity>(); }
}
public IEnumerable<TEntity> FindAll()
{
return DbSet;
}
public List<TEntity> FindBy(string where)
{
var list = DbSet.SqlQuery(where);
return list.ToList();
}
public List<TEntity> FindPageList(string where, int pageIndex, int pageSize, out int totalRecord)
{
totalRecord = 0;
var list = DbSet.SqlQuery(where).Skip((pageIndex - 1) * pageSize).Take(pageSize);
totalRecord = DbSet.SqlQuery(where).Count();
return list.ToList();
}
public TEntity FindById(int id)
{
return DbSet.SingleOrDefault(entity => entity.ID== id);
}
public void Add(TEntity entity)
{
DbSet.Add(entity);
m_dbContext.SaveChanges();
}
public void Delete(TEntity entity)
{
var entry = m_dbContext.Entry(entity);
if (entry.State == EntityState.Detached)
{
//DbSet.Attach(entity);
entry.State = EntityState.Deleted;
//var entityToUpdate = FindById(entity.Id);
//EmitMapper.ObjectMapperManager.DefaultInstance.GetMapper<TEntity, TEntity>().Map(entity, entityToUpdate);
}
m_dbContext.SaveChanges();
}
public void Update(TEntity entity)
{
var entry = m_dbContext.Entry(entity);
if (entry.State == EntityState.Detached)
{
//DbSet.Attach(entity);
entry.State = EntityState.Modified;
//var entityToUpdate = FindById(entity.Id);
//EmitMapper.ObjectMapperManager.DefaultInstance.GetMapper<TEntity, TEntity>().Map(entity, entityToUpdate);
}
m_dbContext.SaveChanges();
}
public void Update(TEntity entity, params string[] fileds)
{
var entry = m_dbContext.Entry(entity);
Type Ttype = typeof(TEntity);
var entityToUpdate = FindById(entity.ID);
context.AttachTo(Ttype.Name, entityToUpdate);
var stateEntry = context.ObjectStateManager.GetObjectStateEntry(entity);
for (int i = 0; i < fileds.Length - 1; i++)
{
stateEntry.SetModifiedProperty(fileds[i]);
}
m_dbContext.SaveChanges();
}
}
