linq - LinqToSQL 不能更新两次

Question

我尝试用相同的数据更新两次，但它抛出异常

    public void UpdateOnSubmit<T>(T data) where T : class
    {
        lock (_lockObj)
        {
            using (DataModel dx = new DataModel(this._adapter.ConnectionString))
            {
                dx.GetTable<T>().Attach(data);
                dx.Refresh(RefreshMode.KeepCurrentValues, data);
                dx.SubmitChanges();
            }
        }
    }

例外是

An attempt has been made to Attach or Add an entity that is not new, perhaps having been loaded from another DataContext. This is not supported.

第一次更新是成功的，但不是第二次。提前致谢

问候，

布赖恩

Answer 1

好吧，好像我又找到了解决方案。我只是将 DeferredLoadingEnabled 设置为 false ，它就像一个魅力。

    public void UpdateOnSubmit<T>(T data) where T : class
    {
        lock (_lockObj)
        {
            using (DataModel dx = new DataModel(this._adapter.ConnectionString))
            {
                dx.DeferredLoadingEnabled = false;
                dx.GetTable<T>().Attach(data);
                dx.Refresh(RefreshMode.KeepCurrentValues, data);
                dx.SubmitChanges();
            }
        }
    }