dotConnect for FreshBooks Documentation
Devart.Common Namespace / DbMonitor Class / TraceEvent Event
Example

TraceEvent Event
Occurs when DbMonitor object signals about some database activity.
Syntax
'Declaration
 
Public Event TraceEvent As MonitorEventHandler
 
Event Data

The event handler receives an argument of type MonitorEventArgs containing data related to this event. The following MonitorEventArgs properties provide information specific to this event.

PropertyDescription
Gets the call stack of the monitor event.  
Gets the description of a DbMonitor event.  
The time between the start and the end of the event.  
Gets DbMonitor event type.  
Gets the additional information for a DbMonitor event.  
Determines whether TraceEvent event occurs before or after the operation takes place.  
Example
The following sample shows how to enable and disable monitoring of database activity in your application.
static void OnEvent(object sender, MonitorEventArgs e)
{
  if (e.TracePoint==MonitorTracePoint.BeforeEvent)
  {
    Console.WriteLine("Description: " + e.Description);
    Console.WriteLine(" Extra info: " + e.ExtraInfo);
  }
}


[MTAThread]
static void Main(string[] args)
{
  FreshBooksConnection freshbooksConn = new FreshBooksConnection(
      "API Version=Alpha;Access Token=3d3355b2beea67f9241400fbe28f0b116e3efd2f8a85dda3c35620acdc95cd60;Refresh Token=75836f50da63fc5bf81bb24598511ae131ea422e73d9f321b4c4a44e2dd1c67f;Company Name=Devart");
  FreshBooksMonitor freshbooksMonitor = new FreshBooksMonitor();
  freshbooksMonitor.TraceEvent += new MonitorEventHandler(OnEvent);
  freshbooksMonitor.IsActive = true;
  FreshBooksCommand freshbooksCommand = new FreshBooksCommand("select count(*) from Client",freshbooksConn);
  freshbooksConn.Open();
  Console.WriteLine(freshbooksCommand.ExecuteScalar());
  freshbooksConn.Close();
  freshbooksMonitor.TraceEvent -= new MonitorEventHandler(OnEvent);
  Console.ReadLine();
}
Sub OnEvent(ByVal sender As Object, ByVal e As MonitorEventArgs)
  If e.TracePoint = MonitorTracePoint.BeforeEvent Then
    Console.WriteLine("Description: " & e.Description)
    Console.WriteLine(" Extra info: " & e.ExtraInfo)
  End If
End Sub

<MTAThread()> _
Sub Main()
  Dim freshbooksConn As FreshBooksConnection = New FreshBooksConnection( _
      "API Version=Alpha;Access Token=3d3355b2beea67f9241400fbe28f0b116e3efd2f8a85dda3c35620acdc95cd60;Refresh Token=75836f50da63fc5bf81bb24598511ae131ea422e73d9f321b4c4a44e2dd1c67f;Company Name=Devart")
  Dim freshbooksMonitor As FreshBooksMonitor = New FreshBooksMonitor
  AddHandler freshbooksMonitor.TraceEvent, AddressOf OnEvent
  freshbooksMonitor.IsActive = True
  Dim freshbooksCommand As FreshBooksCommand = New FreshBooksCommand("select count(*) from Client", freshbooksConn)
  freshbooksConn.Open()
  Console.WriteLine(freshbooksCommand.ExecuteScalar())
  freshbooksConn.Close()
  RemoveHandler freshbooksMonitor.TraceEvent, AddressOf OnEvent
  Console.ReadLine()
End Sub
Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also