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.
The following sample shows how to enable and disable monitoring of database activity in your application.
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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)
{
MongoDBConnection mongoDBConn = new MongoDBConnection(
"Host=localhost;Port=27017;Database=sample;User Id=user;Password=pwd;");
MongoDBMonitor mongoDBMonitor = new MongoDBMonitor();
mongoDBMonitor.TraceEvent += new MonitorEventHandler(OnEvent);
mongoDBMonitor.IsActive = true;
MongoDBCommand mongoDBCommand = new MongoDBCommand("select count(*) from emp",mongoDBConn);
mongoDBConn.Open();
Console.WriteLine(mongoDBCommand.ExecuteScalar());
mongoDBConn.Close();
mongoDBMonitor.TraceEvent -= new MonitorEventHandler(OnEvent);
Console.ReadLine();
} |
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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 mongoDBConn As MongoDBConnection = New MongoDBConnection( _
"Host=localhost;Port=27017;Database=sample;User Id=user;Password=pwd;")
Dim mongoDBMonitor As MongoDBMonitor = New MongoDBMonitor
AddHandler mongoDBMonitor.TraceEvent, AddressOf OnEvent
mongoDBMonitor.IsActive = True
Dim mongoDBCommand As MongoDBCommand = New MongoDBCommand("select count(*) from emp", mongoDBConn)
mongoDBConn.Open()
Console.WriteLine(mongoDBCommand.ExecuteScalar())
mongoDBConn.Close()
RemoveHandler mongoDBMonitor.TraceEvent, AddressOf OnEvent
Console.ReadLine()
End Sub |
