public static bool DeleteEntity(T entity)
{
using (var pointContext = new PointContexts())
{
pointContext.Set <T>().Attach(entity);
pointContext.Entry <T>(entity).State = EntityState.Deleted;
return(pointContext.SaveChanges() > 0);
}
}
protected static T AddEntity(T entity)
{
using (var pointContext = new PointContexts())
{
pointContext.Entry(entity).State = EntityState.Added;
//下面的写法统一
pointContext.SaveChanges();
return(entity);
}
}
protected static bool UpdateEntity(T entity)
{
//EF4.0的写法
//Db.CreateObjectSet<T>().Addach(entity);
//Db.ObjectStateManager.ChangeObjectState(entity, EntityState.Modified);
//EF5.0的写法
using (var pointContext = new PointContexts())
{
pointContext.Set <T>().Attach(entity);
pointContext.Entry <T>(entity).State = EntityState.Modified;
return(pointContext.SaveChanges() > 0);
}
}