带有Microsoft Enterprise Library的MVC Mini Profiler

Question

我确信可以分析Enterprise Library SQL命令,但我无法弄清楚如何包装连接.这就是我想出的:

Database db = DatabaseFactory.CreateDatabase();
DbCommand dbCommand = db.GetStoredProcCommand(PROC);

ProfiledDbCommand cmd = new ProfiledDbCommand(dbCommand, dbCommand.Connection, MvcMiniProfiler.MiniProfiler.Current);
db.AddInParameter(cmd, "foo", DbType.Int64, 0);

DataSet ds = db.ExecuteDataSet(cmd);

这导致以下异常:

无法将类型为"MvcMiniProfiler.Data.ProfiledDbCommand"的对象强制转换为"System.Data.SqlClient.SqlCommand".

Answer 1

例外来自Entlib Database.DoLoadDataSet中的这一行

    ((IDbDataAdapter) adapter).SelectCommand = command; 

在这种情况下,适配器的类型为SqlDataAdapter,它需要一个SqlCommand,ProfiledDbProviderFactory创建的命令的类型为ProfiledDbCommand,如异常所示.

此解决方案将通过覆盖ProfiledDbProviderFactory中的CreateDataAdapter和CreateCommand为EntLib提供通用DbDataAdapter.它似乎可行,但如果我监督了这个黑客可能造成的任何不必要的后果(或者它可能造成的眼睛疼痛),我道歉.在这里:

1. 创建两个新类ProfiledDbProviderFactoryForEntLib和DbDataAdapterForEntLib

   public class ProfiledDbProviderFactoryForEntLib : ProfiledDbProviderFactory
   {
       private DbProviderFactory _tail;
       public static ProfiledDbProviderFactory Instance = new ProfiledDbProviderFactoryForEntLib();
   
       public ProfiledDbProviderFactoryForEntLib(): base(null, null)
       {
       }
   
       public void InitProfiledDbProviderFactory(IDbProfiler profiler, DbProviderFactory tail)
       {
           base.InitProfiledDbProviderFactory(profiler, tail);
           _tail = tail;
       }
   
       public override DbDataAdapter CreateDataAdapter()
       {
           return new DbDataAdapterForEntLib(base.CreateDataAdapter());
       }
   
       public override DbCommand CreateCommand()
       {
           return _tail.CreateCommand(); 
       }        
   }
   
   public class DbDataAdapterForEntLib : DbDataAdapter
   {
       private DbDataAdapter _dbDataAdapter;
       public DbDataAdapterForEntLib(DbDataAdapter adapter)
       : base(adapter)
      {
           _dbDataAdapter = adapter;
      }
   }
   

2. 在Web.config中,将ProfiledDbProviderFactoryForEntLib添加到DbProviderFactories并将ProfiledDbProviderFactoryForEntLib设置为您的connectionstring的providerName

   <configuration>
       <configSections>
           <section name="dataConfiguration" type="..."  />
       </configSections>
       <connectionStrings>
           <add name="SqlServerConnectionString" connectionString="Data Source=xyz;Initial Catalog=dbname;User ID=u;Password=p"
     providerName="ProfiledDbProviderFactoryForEntLib" />
       </connectionStrings>
       <system.data>
           <DbProviderFactories>
             <add name="EntLib DB Provider"
              invariant="ProfiledDbProviderFactoryForEntLib"
              description="Profiled DB provider for EntLib"
              type="MvcApplicationEntlib.ProfiledDbProviderFactoryForEntLib,     MvcApplicationEntlib, Version=1.0.0.0, Culture=neutral"/>
           </DbProviderFactories>
       </system.data>
       <dataConfiguration defaultDatabase="..." />
       <appSettings>... <system.web>... etc ...
   </configuration>
   

   (MvcApplicationEntlib是我的测试项目的名称)

3. 在对DB进行任何调用之前设置ProfiledDbProviderFactoryForEntLib(对黑客敏感的读者会被警告,这就是丑陋的地方)

   //In Global.asax.cs 
       protected void Application_Start()
       {
   
           ProfiledDbProviderFactoryForEntLib profiledProfiledDbProviderFactoryFor = ((ProfiledDbProviderFactoryForEntLib)DbProviderFactories.GetFactory("ProfiledDbProviderFactoryForEntLib"));
           DbProviderFactory factory = DbProviderFactories.GetFactory("System.Data.SqlClient"); //or whatever predefined factory you want to profile
           profiledProfiledDbProviderFactoryFor.InitProfiledDbProviderFactory(MiniProfiler.Current, factory); 
       ...
   

   这可能是以更好的方式或在其他地方完成的.MiniProfiler.Current在这里将为null,因为此处没有任何内容.

4. 像从头开始一样调用存储过程

   public class HomeController : Controller
       {
           public ActionResult Index()
           { 
               Database db = DatabaseFactory.CreateDatabase();
               DbCommand dbCommand = db.GetStoredProcCommand("spGetSomething");
               DbCommand cmd = new ProfiledDbCommand(dbCommand, dbCommand.Connection, MiniProfiler.Current);
               DataSet ds = db.ExecuteDataSet(cmd);
               ...
   

编辑:好的不确定你想如何使用它.跳过手动创建ProfiledDbCommand.需要使用miniprofiler为每个请求启动ProfiledDbProviderFactory.

1. 在Global.asax.cs中,删除对Application_Start所做的更改(上面步骤3中的出厂设置),将其添加到Application_BeginRequest中.

   ProfiledDbProviderFactoryForEntLib profiledProfiledDbProviderFactoryFor = ((ProfiledDbProviderFactoryForEntLib) DbProviderFactories.GetFactory("ProfiledDbProviderFactoryForEntLib"));
   DbProviderFactory factory = DbProviderFactories.GetFactory("System.Data.SqlClient");
   profiledProfiledDbProviderFactoryFor.InitProfiledDbProviderFactory(MvcMiniProfiler.MiniProfiler.Start(), factory);
   

2. 从ProfiledDbProviderFactoryForEntLib中删除方法CreateCommand,让ProfiledDbProviderFactory创建profiled命令.

3. 执行您的SP而不创建ProfiledDbCommand,就像这样

   Database db = DatabaseFactory.CreateDatabase();
   DbCommand dbCommand = db.GetStoredProcCommand("spGetSomething");
   DataSet ds = db.ExecuteDataSet(dbCommand);