TraceEvent Event

Occurs when DbMonitor object signals about some database activity.

[Visual Basic]
Public Event TraceEvent() As MonitorEventHandler

[C#]
public event MonitorEventHandler TraceEvent();

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.

Property	Description
CallStack	Gets the call stack of the monitor event.
Description	Gets the description of a DbMonitor event.
Duration	The time between the start and the end of the event.
EventType	Gets DbMonitor event type.
ExtraInfo	Gets the additional information for a DbMonitor event.
TracePoint	Determines whether DbMonitor.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.

[C#]

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) 
{ 
  OracleConnection myConn = new OracleConnection( 
      "User Id=Scott;Password=tiger;Data Source=Ora"); 
  OracleMonitor myMonitor = new OracleMonitor(); 
  myMonitor.TraceEvent += new MonitorEventHandler(OnEvent); 
  myMonitor.IsActive = true; 
  OracleCommand myCommand = new OracleCommand("select count(*) from dept",myConn); 
  myConn.Open(); 
  Console.WriteLine(myCommand.ExecuteScalar()); 
  myConn.Close(); 
  myMonitor.TraceEvent -= new MonitorEventHandler(OnEvent); 
  Console.ReadLine(); 
}

[Visual Basic]

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 myConn As OracleConnection = New OracleConnection( _
       "User Id=Scott;Password=tiger;Data Source=Ora")
   Dim myMonitor As OracleMonitor = New OracleMonitor
   AddHandler myMonitor.TraceEvent, AddressOf OnEvent
   myMonitor.IsActive = True
   Dim myCommand As OracleCommand = New OracleCommand("select count(*) from dept", myConn)
   myConn.Open()
   Console.WriteLine(myCommand.ExecuteScalar())
   myConn.Close()
   RemoveHandler myMonitor.TraceEvent, AddressOf OnEvent
   Console.ReadLine()
 End Sub

See Also

Language

TraceEvent Event

Event Data

Example

See Also