MonitorEventArgs Class

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Provides data for the TraceEvent event of the DbMonitor class.

Syntax

Visual Basic
C#


'Declaration Public Class MonitorEventArgs Inherits System.EventArgs


public class MonitorEventArgs : System.EventArgs

Remarks

The TraceEvent event occurs when DbMonitor object is active and the monitoring application performs any SQL activity.

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) { SQLiteConnection sqConn = new SQLiteConnection( "DataSource=mydatabase.db;"); SQLiteMonitor sqMonitor = new SQLiteMonitor(); sqMonitor.TraceEvent += new MonitorEventHandler(OnEvent); sqMonitor.IsActive = true; SQLiteCommand sqCommand = new SQLiteCommand("select count(*) from Dept",sqConn); sqConn.Open(); Console.WriteLine(sqCommand.ExecuteScalar()); sqConn.Close(); sqMonitor.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)
{
  SQLiteConnection sqConn = new SQLiteConnection(
      "DataSource=mydatabase.db;");
  SQLiteMonitor sqMonitor = new SQLiteMonitor();
  sqMonitor.TraceEvent += new MonitorEventHandler(OnEvent);
  sqMonitor.IsActive = true;
  SQLiteCommand sqCommand = new SQLiteCommand("select count(*) from Dept",sqConn);
  sqConn.Open();
  Console.WriteLine(sqCommand.ExecuteScalar());
  sqConn.Close();
  sqMonitor.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 sqConn As SQLiteConnection = New SQLiteConnection( _ "DataSource=mydatabase.db;") Dim sqMonitor As SQLiteMonitor = New SQLiteMonitor AddHandler sqMonitor.TraceEvent, AddressOf OnEvent sqMonitor.IsActive = True Dim sqCommand As SQLiteCommand = New SQLiteCommand("select count(*) from Dept", sqConn) sqConn.Open() Console.WriteLine(sqCommand.ExecuteScalar()) sqConn.Close() RemoveHandler sqMonitor.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 sqConn As SQLiteConnection = New SQLiteConnection( _
      "DataSource=mydatabase.db;")
  Dim sqMonitor As SQLiteMonitor = New SQLiteMonitor
  AddHandler sqMonitor.TraceEvent, AddressOf OnEvent
  sqMonitor.IsActive = True
  Dim sqCommand As SQLiteCommand = New SQLiteCommand("select count(*) from Dept", sqConn)
  sqConn.Open()
  Console.WriteLine(sqCommand.ExecuteScalar())
  sqConn.Close()
  RemoveHandler sqMonitor.TraceEvent, AddressOf OnEvent
  Console.ReadLine()
End Sub

Inheritance Hierarchy

System.Object
System.EventArgs
Devart.Common.MonitorEventArgs

Reference

MonitorEventArgs Members
Devart.Common Namespace

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