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PO
 

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  1. PO
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    <p>I've done this by creating a wrapper class around the ObjectContext and using that wrapper instead of the original context. Here's an example context wrapper:</p> <pre><code>public partial class LoggedContext : MyContext { public LoggedContext() : this("name=MyEntities") // Adjust this to match your entities { } public LoggedContext(string connectionString) : base(EntityConnectionWrapperUtils.CreateEntityConnectionWithWrappers(connectionString) { } private EFTracingConnection TracingConnection { get { return this.UnwrapConnection&lt;EFTracingConnection&gt;(); } } public event EventHandler&lt;CommandExecutionEventArgs&gt; CommandExecuting { add { this.TracingConnection.CommandExecuting += value; } remove { this.TracingConnection.CommandExecuting -= value; } } public event EventHandler&lt;CommandExecutionEventArgs&gt; CommandFinished { add { this.TracingConnection.CommandFinished += value; } remove { this.TracingConnection.CommandFinished -= value; } } public event EventHandler&lt;CommandExecutionEventArgs&gt; CommandFailed { add { this.TracingConnection.CommandFailed += value; } remove { this.TracingConnection.CommandFailed -= value; } } } </code></pre> <p>I also have a static class that defines the tracing output method and has a static method to initialize tracing. Here:</p> <pre><code>public static class EFTracingExtensions { private static ILogger _logger; public static void InitSqlTracing(ILogger logger) { _logger = logger; EFTracingProviderConfiguration.RegisterProvider(); if (logger.IsLoggingEnabled()) // Don't add logging hooks if logging isn't enabled { EFTracingProviderConfiguration.LogAction = new Action&lt;CommandExecutionEventArgs&gt;(AppendSqlLog); } } private static void AppendSqlLog(CommandExecutionEventArgs e) { if (e.Status != CommandExecutionStatus.Executing) // we only care about Finished and Failed { StringBuilder msg = new StringBuilder(e.ToTraceString().TrimEnd()); msg.Append(Environment.NewLine); if (e.Result is SqlDataReader) { int rows = ((SqlDataReader)e.Result).HasRows ? ((SqlDataReader)e.Result).RecordsAffected : 0; msg.AppendFormat("*** {0} rows affected", rows); } else if (e.Result is int) { msg.AppendFormat("*** result: {0}", e.Result); } else { msg.AppendFormat("*** finished, result: {0}", e.Result); } msg.Append(Environment.NewLine); msg.AppendFormat(" [{0}] [{1}] in {2} seconds", e.Method, e.Status, e.Duration); _logger.Log(msg.ToString(), LoggerCategories.SQL); } } } </code></pre> <p>ILogger is the logging interface I'm using. You need to substitute your own interface/methods.</p> <p>The InitSqlTracing method is invoked once when my program starts up, and then the LoggedContext class is used to log all the SQL generated by Entity Framework.</p> <p>Putting it all together with your sample code:</p> <pre><code>EFTracingExtensions.InitSqlTracing(logger); // only call this once using (var context = new LoggedContext()) { var a = from data in context.Projects select data; } </code></pre>
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    1. POEntity Framework Tracing provider wrapper without config files
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    1. USJimMat
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    1. COI am using code first approach so there is DbContext and not ObjectContext so I need something little bit different.
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      1. USLukas Pirkl
 

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