对象不能被删除，因为它没有在ObjectStateManager发现 [英] The object cannot be deleted because it was not found in the ObjectStateManager

问题描述

我得到这个错误的对象不能因为它没有在ObjectStateManager中删除。

我的code是：

 保护MyEntities sqlEntities;    公共虚拟无效删除（TEntity实体）
    {
        System.Type的T = typeof运算（TEntity）已;
        sqlEntities.DeleteObject（实体）;
        sqlEntities.SaveChanges（）;
    }
 

解决方案

这意味着实体未附后（它不是由同一个上下文实例加载）。试试这个：

 保护MyEntities sqlEntities;公共虚拟无效删除（TEntity实体）
{
    sqlEntities.Attach（实体）;
    sqlEntities.DeleteObject（实体）;
    sqlEntities.SaveChanges（）;
}
 

I am getting this error "The object cannot be deleted because it was not found in the ObjectStateManager."

My code is:

    protected MyEntities sqlEntities;

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

解决方案

It means that entity is not attached (it was not loaded by the same context instance). Try this:

protected MyEntities sqlEntities;

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

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