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.
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)
{
UniConnection myConn = new UniConnection(
"Provider=MySQL;User Id=root;Host=localhost;Database=Test"
);
UniMonitor myMonitor = new UniMonitor();
myMonitor.TraceEvent += new MonitorEventHandler(OnEvent);
myMonitor.IsActive = true;
UniCommand myCommand = new UniCommand("select count(*) from dept",myConn);
myConn.Open();
Console.WriteLine(myCommand.ExecuteScalar());
myConn.Close();
myMonitor.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 myConn As UniConnection = New UniConnection( _
"Provider=MySQL;User Id=root;Host=localhost;Database=Test" _
)
Dim myMonitor As UniMonitor = New UniMonitor
AddHandler myMonitor.TraceEvent, AddressOf OnEvent
myMonitor.IsActive = True
Dim myCommand As UniCommand = New UniCommand("select count(*) from dept", myConn)
myConn.Open()
Console.WriteLine(myCommand.ExecuteScalar())
myConn.Close()
RemoveHandler myMonitor.TraceEvent, AddressOf OnEvent
Console.ReadLine()
End Sub
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