C# ADO.net中的查询超时，但它在SQL Server Mgmt Studio中工作

这是我的配置：

Windows 7 Pro 64b SP1 Microsoft SQL Server 2014- Microsoft SQL Server Management Studio 12.0.2000.8 Microsoft.NET Framewrok 4.5.1 SDK Microsoft Visual Studio 2013 v12 尝试运行以下查询时遇到问题：

declare @date datetime
set @date='9/12/2014 15:58:06’

    SELECT  TOP 1000 Articolo1.id as 'Articolo1.id' , Articolo1.nome as 'Articolo1.nome' 
    FROM Articolo as Articolo1 WITH (NOLOCK)  
    WHERE ((Articolo1.dataUltimaModifica  >=  @date)) 
     AND NOT EXISTS (
         SELECT [TabPagExt].[TabPag_Id] AS [TabPag_Id]
         FROM ( SELECT TOP 1000 Articolo1_PAG.[Id] AS [TabPag_Id]  
                FROM Articolo as Articolo1_PAG WITH (NOLOCK)
                WHERE ((Articolo1_PAG.dataUltimaModifica  >=  @date)) 
                ORDER BY  Articolo1_PAG.dataUltimaModifica ASC 
               )  AS [TabPagExt] WHERE Articolo1.[Id] = [TabPagExt].[TabPag_Id]
     ) 
    ORDER BY  Articolo1.dataUltimaModifica ASC

如果我在SSMS SQL Server Management Studio中启动它，它将毫无问题地运行，但当我在ADO.net中尝试它时，它会抛出一个错误：

System.Data.SqlClient.SqlException:超时

两者都是针对同一机器和连接中的生产服务器启动的

以下是源代码：

private void button1_Click(object sender, EventArgs e)
{
            SqlConnection conn = new SqlConnection(@"Server=mypc\sqlpass2014;Database=myDB;User Id=id;Password=pass;");
            SqlCommand command = new SqlCommand();
            command.CommandTimeout = 150;
            command.Connection = conn;
            conn.Open();
            //command.CommandText = "SET ARITHABORT ON ";
            //command.ExecuteNonQuery();
            command.CommandText = "SELECT TOP 1000 Articolo1.id as 'Articolo1.id' , Articolo1.nome as 'Articolo1.nome' FROM Articolo as Articolo1 WITH (NOLOCK)  WHERE ((Articolo1.dataUltimaModifica  >=  @Articolo1_dataUltimaModificaxxxxx0)) AND NOT EXISTS (SELECT [TabPagExt].[TabPag_Id] AS [TabPag_Id] FROM ( SELECT TOP 1000 Articolo1_PAG.[Id] AS [TabPag_Id]  FROM Articolo as Articolo1_PAG WITH (NOLOCK) WHERE ((Articolo1_PAG.dataUltimaModifica  >=  @Articolo1_dataUltimaModificaxxxxx0)) ORDER BY  Articolo1_PAG.dataUltimaModifica ASC )  AS [TabPagExt] WHERE Articolo1.[Id] = [TabPagExt].[TabPag_Id])  ORDER BY  Articolo1.dataUltimaModifica ASC  ";
            command.Parameters.Add(new SqlParameter("@Articolo1_dataUltimaModificaxxxxx0", new DateTime(2014, 12, 9, 15, 58, 06)));
            try
            {
                SqlDataReader reader = command.ExecuteReader();

                int rows = 0;
                try
                {
                    while (reader.Read())
                        rows++;
                }
                finally
                {
                    reader.Close();
                }
                MessageBox.Show("Rows read: " + rows.ToString());
            }
            catch (Exception exc)
            {
                MessageBox.Show(exc.ToString());
            }
            finally
            {
                conn.Close();
            }
}

我已经尝试过在StackOverflow中看到的类似案例中给出的所有解决方案，但没有一个对我有效

关于问题的来源和可能的解决方案/解决方法有什么线索吗

提前感谢大家的帮助

---

Mirco

在SSMS中运行需要多长时间。ADO.net连接将超时我认为默认值是30秒，但它可以调整，而management studio中的查询只会运行到完成。嗨，这不是一个可调整超时的连接，我的意思是，重要的是，我一直尝试到150、180甚至210秒，但没有任何更改。在SSMS中，大约需要50秒才能完成。