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我有与班级帐户和城市相关联的班级联系人。城市与类状态关联，当我尝试插入新的联系人数据时，关联的类也被插入。这怎么会发生？以及如何解决？

方法 InsertOnSubmit

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

添加新联系人

InsertOnSubmit(new Contact { Name = this.Name, Account = Session.Account, City = this.CurrentCity });

注意：对象城市、帐户和状态来自不同的数据上下文。我使用 SQL Server Compact 3.5 作为数据库服务器。

触发 dx.SubmitChanges() 时从控制台登录

INSERT INTO [State]([Name])
VALUES (@p0)
-- @p0: Input String (Size = 0; Prec = 0; Scale = 0) [Center America]
-- Context: SqlProvider(SqlCE) Model: AttributedMetaModel Build: 4.0.30319.1

SELECT CONVERT(Int,@@IDENTITY) AS [value]
-- @ROWCOUNT: Input Int32 (Size = 0; Prec = 0; Scale = 0) [1]
-- Context: SqlProvider(SqlCE) Model: AttributedMetaModel Build: 4.0.30319.1

INSERT INTO [City]([StateId], [Name])
VALUES (@p0, @p1)
-- @p0: Input Int32 (Size = 0; Prec = 0; Scale = 0) [10]
-- @p1: Input String (Size = 0; Prec = 0; Scale = 0) [Los Angeles]
-- Context: SqlProvider(SqlCE) Model: AttributedMetaModel Build: 4.0.30319.1

SELECT CONVERT(Int,@@IDENTITY) AS [value]
-- @ROWCOUNT: Input Int32 (Size = 0; Prec = 0; Scale = 0) [1]
-- Context: SqlProvider(SqlCE) Model: AttributedMetaModel Build: 4.0.30319.1

INSERT INTO [Contact]([AccountId], [CityId], [Name])
VALUES (@p0, @p1, @p2)
-- @p0: Input Int32 (Size = 0; Prec = 0; Scale = 0) [1]
-- @p1: Input Int32 (Size = 0; Prec = 0; Scale = 0) [18]
-- @p2: Input String (Size = 0; Prec = 0; Scale = 0) [Sarah]
-- Context: SqlProvider(SqlCE) Model: AttributedMetaModel Build: 4.0.30319.1

SELECT CONVERT(Int,@@IDENTITY) AS [value]
-- @ROWCOUNT: Input Int32 (Size = 0; Prec = 0; Scale = 0) [1]
-- Context: SqlProvider(SqlCE) Model: AttributedMetaModel Build: 4.0.30319.1

问候，

布赖恩

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0 回答 0