c# - 无法删除该对象，因为在 ObjectStateManager 中找不到它

Question

我收到此错误“无法删除该对象，因为在 ObjectStateManager 中找不到它。”

我的代码是:

    protected MyEntities sqlEntities;

    public virtual void Delete(TEntity entity)
    {
        System.Type t = typeof(TEntity);
        sqlEntities.DeleteObject(entity);
        sqlEntities.SaveChanges();
    }

Answer 1

这意味着实体没有附加(它不是由同一个上下文实例加载的)。试试这个:

protected MyEntities sqlEntities;

public virtual void Delete(TEntity entity)
{
    sqlEntities.Attach(entity);
    sqlEntities.DeleteObject(entity);
    sqlEntities.SaveChanges();
}