在C＃中访问SQL Server查询的InfoMessages
我试图在消息选项卡中读取SQL Server通常在SSMS中返回的消息。 具体来自SET STATISTICS IO和TIME 。 下面的代码有效但实际上并没有给出这个输出。 任何帮助是极大的赞赏。 谢谢。
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); } } }
这是输出：
13/14/2012 1:14:18 PMCREATE_TABLE 23/14/2012 1:14:18 PMALTER_TABLE 53/14/2012 1:14:18 PMCREATE_TYPE 63/14/2012 1:14:18 PMCREATE_TYPE 213/14/2012 1:14:19 PMCREATE_XML_SCHEMA_COLLECTION ExecutionTime 46 UnpreparedExecs 1 SelectRows 5 Prepares 0 BuffersSent 1 PreparedExecs 0 SelectCount 2 IduRows 0 BytesReceived 911 Transactions 0 IduCount 0 ServerRoundtrips 1 CursorOpens 0 SumResultSets 1 NetworkServerTime 0 ConnectionTime 0 BytesSent 262 BuffersReceived 1 Success Hit Enter to Continue
最终解决方案是Fill方法不会触发InfoMessage方法，因此我无法捕获消息。 我发现StackOverflow上的另一篇文章解决了这个问题。 以下是工作代码。 https://stackoverflow.com/a/2914981/62511
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(); } } }
首先我不认为
SET STATISTICS IO ON
需要… io统计似乎被控制为SqlConnection类的StatisticsEnabled属性…
时间统计的东西真的很奇怪…我有同样的问题……我发现当你在SET STATISTICS TIME ON和SELECT之间插入一个print语句时，InfoMessage的处理程序被调用就像它应该是…一次用于打印声明，一次用于统计…
ps：试图把完整的声明放在这里，但无法提交（“提交答案时出错”）…希望你能自己找到…