如何仅从SqlTableDependency中更改一列

时间:2018-09-06 15:36:47

标签: c# .net sqldependency

当我的数据表UserSubsidiaryFunction中有任何更改(插入,更新或删除)时,我将使用以下代码获取所有表:

using (SqlConnection connection = new SqlConnection(connectionString))
{
    //using SqlTableDependency
    using (var tableDependency = new SqlTableDependency<UserSubsidiaryFunction>(connectionString, "UserSubsidiaryFunction"))
    {
        tableDependency.OnChanged += TableDependency_Changed;
        tableDependency.OnError += TableDependency_OnError;
        tableDependency.Start();

        Console.WriteLine("Waiting for receiving notifications . . .");
        Console.WriteLine("Press a key to stop");
        Console.ReadKey();

        tableDependency.Stop();
    }                  
}

和:

static void TableDependency_Changed(object sender, RecordChangedEventArgs<UserSubsidiaryFunction> e)
{
    Console.WriteLine(Environment.NewLine);

    if (e.ChangeType != ChangeType.None)
    {
        var changedEntity = e.Entity;

        Console.WriteLine($"DML operation : {e.ChangeType}");
        Console.WriteLine($"pk_UserSubsidiaryFunction new value : {e.Entity.fk_Subsidiary}");
        Console.WriteLine($"fk_User : {changedEntity.fk_User}");
        Console.WriteLine($"fk_Subsidiary : {changedEntity.fk_Subsidiary}");
        Console.WriteLine(Environment.NewLine);
    }
}

但是,如果有任何更改,我只想获取被修改的列名。 sqlTableDependency有可能吗?如果不是,是否可以使用SqlDependency?怎么样?谢谢

0 个答案:

没有答案