C# 在C中访问SQL Server查询的InfoMessages

我正在尝试读取SQL Server通常在“消息”选项卡的SSMS中返回的消息。特别是来自设置统计IO和时间的信息。下面的代码可以工作，但实际上没有给出这个输出。非常感谢您的帮助。多谢各位

using System;
using System.Collections;
using System.Data.SqlClient;
using System.Data;

namespace ConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            var cn2 = new MedusaPerf.ConnectionStringBuilder().GetTrustedConnectionString("localhost", "AdventureWorks2012", false);
            //var cn2 = new MedusaPerf.ConnectionStringBuilder().GetStandardConnectionString("localhost", "AdventureWorks2012", "testuser", "pass", false);
            string infoMessageText = "";

            try
            {
                var cmd = "SET STATISTICS IO ON; SET STATISTICS TIME ON; SELECT TOP(5) DatabaseLogID, PostTime, Event FROM [dbo].[DatabaseLog];";
                cn2.StatisticsEnabled = true;
                //cn2.InfoMessage += new SqlInfoMessageEventHandler(InfoMessageHandler);
                cn2.InfoMessage += delegate(object sender, SqlInfoMessageEventArgs e)
                    {
                        infoMessageText += e.Message.ToString();
                    };
                var daDataOutput = new SqlDataAdapter(cmd, cn2);

                DataTable dtOutput = new DataTable();
                daDataOutput.Fill(dtOutput);

                foreach (DataRow i in dtOutput.Rows)
                {
                    string dataRowOutput = "";

                    for (int j = 0; j < dtOutput.Columns.Count; j++)
                    {
                        dataRowOutput = dataRowOutput + i[j].ToString();
                    }

                    Console.WriteLine(dataRowOutput);
                }

                IDictionary d = cn2.RetrieveStatistics();
                string[] keys = new string[d.Count];
                d.Keys.CopyTo(keys,0);

                for (int x = 0; x < d.Count; x++)
                {
                    Console.WriteLine("{0}\t{1}",keys[x], (long)d[keys[x]]);
                }

                Console.WriteLine("Success ");
            }
            catch (Exception)
            {
                throw;
            }

            Console.WriteLine(infoMessageText);
            Console.WriteLine("Hit Enter to Continue");

            System.Console.ReadKey();
        }

        static void InfoMessageHandler(object sender, SqlInfoMessageEventArgs e)
        {
            string myMsg = e.Message;
            Console.WriteLine(e.Message);
        }
    }
}

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首先，我不认为

SET STATISTICS IO ON

需要。。。io统计信息似乎由SqlConnection类的StatisticsEnabled属性控制

时间统计真的很奇怪。。。我也有同样的问题。。。我发现，当您在“设置统计时间”和“选择”之间插入打印语句时。。。InfoMessage的处理程序会被调用，就像它应该被调用一样。。。一次用于打印语句，一次用于统计

---

ps：尝试将完整的语句放在此处，但无法提交提交答案时出错。。。希望你能找到你自己…

最终的解决方案是Fill方法不会触发InfoMessage方法，因此我无法捕获消息。我在StackOverflow上找到了另一篇文章，阐述了这个原因。下面是工作代码

---

我添加了打印声明，但这只为该声明提供了时间。用一种全新的眼光，我注意到我可以从我的原始帖子中的SatisticsEnabled输出中获得执行时间，但我仍然看不到逻辑读取计数；而reader.Read{}reader.NextResult；如果您检索像这样的数据，您将获得所有信息消息。。。

SET STATISTICS IO ON

using System;
using System.Collections;
using System.Data.SqlClient;
using System.Data;

namespace ConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            var cn2 = new MedusaPerf.ConnectionStringBuilder().GetTrustedConnectionString("localhost", "AdventureWorks2012", false);
            //var cn2 = new MedusaPerf.ConnectionStringBuilder().GetStandardConnectionString("localhost", "AdventureWorks2012", "testuser", "pass", false);
            string infoMessageText = "";

            var cmd = "SET STATISTICS IO ON; SET STATISTICS TIME ON; SELECT DatabaseLogID, PostTime, Event FROM [dbo].[DatabaseLog];";
            cn2.StatisticsEnabled = true;
            cn2.InfoMessage += delegate(object sender, SqlInfoMessageEventArgs e)
            {
                infoMessageText += e.Message.ToString();
            };

            cn2.Open();


            try
            {
                SqlCommand comm = new SqlCommand(cmd, cn2);
                comm.ExecuteNonQuery();



                IDictionary d = cn2.RetrieveStatistics();
                string[] keys = new string[d.Count];
                d.Keys.CopyTo(keys, 0);

                for (int x = 0; x < d.Count; x++)
                {
                    Console.WriteLine("{0}\t{1}", keys[x], (long)d[keys[x]]);
                }
                Console.WriteLine("Success ");

            }
            catch (Exception)
            {

                throw;
            }

            //Console.Write(conn_InfoMessage());

            cn2.Close();
            Console.WriteLine(infoMessageText);
            Console.WriteLine("Hit Enter to Continue");
            System.Console.ReadKey();



        }

    }
}