TraceEvent Event

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Occurs when DbMonitor object signals about some database activity.

Syntax

Visual Basic
C#


'Declaration Public Event TraceEvent As MonitorEventHandler


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 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.

csharp


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) { SalesforceConnection salesforceConn = new SalesforceConnection( "Server=login.salesforce.com;User Id= [email protected];Password=mypassword;Security Token=qweASDzcx1234567890rtyui;"); SalesforceMonitor salesforceMonitor = new SalesforceMonitor(); salesforceMonitor.TraceEvent += new MonitorEventHandler(OnEvent); salesforceMonitor.IsActive = true; SalesforceCommand salesforceCommand = new SalesforceCommand("select count(*) from Account",salesforceConn); salesforceConn.Open(); Console.WriteLine(salesforceCommand.ExecuteScalar()); salesforceConn.Close(); salesforceMonitor.TraceEvent -= new MonitorEventHandler(OnEvent); Console.ReadLine(); }

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)
{
  SalesforceConnection salesforceConn = new SalesforceConnection(
      "Server=login.salesforce.com;User Id= [email protected];Password=mypassword;Security Token=qweASDzcx1234567890rtyui;");
  SalesforceMonitor salesforceMonitor = new SalesforceMonitor();
  salesforceMonitor.TraceEvent += new MonitorEventHandler(OnEvent);
  salesforceMonitor.IsActive = true;
  SalesforceCommand salesforceCommand = new SalesforceCommand("select count(*) from Account",salesforceConn);
  salesforceConn.Open();
  Console.WriteLine(salesforceCommand.ExecuteScalar());
  salesforceConn.Close();
  salesforceMonitor.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 salesforceConn As SalesforceConnection = New SalesforceConnection( _ "Server=login.salesforce.com;User Id= [email protected];Password=mypassword;Security Token=qweASDzcx1234567890rtyui;") Dim salesforceMonitor As SalesforceMonitor = New SalesforceMonitor AddHandler salesforceMonitor.TraceEvent, AddressOf OnEvent salesforceMonitor.IsActive = True Dim salesforceCommand As SalesforceCommand = New SalesforceCommand("select count(*) from Account", salesforceConn) salesforceConn.Open() Console.WriteLine(salesforceCommand.ExecuteScalar()) salesforceConn.Close() RemoveHandler salesforceMonitor.TraceEvent, AddressOf OnEvent Console.ReadLine() End Sub

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 salesforceConn As SalesforceConnection = New SalesforceConnection( _
      "Server=login.salesforce.com;User Id= [email protected];Password=mypassword;Security Token=qweASDzcx1234567890rtyui;")
  Dim salesforceMonitor As SalesforceMonitor = New SalesforceMonitor
  AddHandler salesforceMonitor.TraceEvent, AddressOf OnEvent
  salesforceMonitor.IsActive = True
  Dim salesforceCommand As SalesforceCommand = New SalesforceCommand("select count(*) from Account", salesforceConn)
  salesforceConn.Open()
  Console.WriteLine(salesforceCommand.ExecuteScalar())
  salesforceConn.Close()
  RemoveHandler salesforceMonitor.TraceEvent, AddressOf OnEvent
  Console.ReadLine()
End Sub

Reference

DbMonitor Class
DbMonitor Members

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