MonitorEventArgs Class

In This Topic

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)
{
  MySqlConnection myConn = new MySqlConnection(
      "User Id=root;Host=localhost;Database=Test;");
  MySqlMonitor myMonitor = new MySqlMonitor();
  myMonitor.TraceEvent += new MonitorEventHandler(OnEvent);
  myMonitor.IsActive = true;
  MySqlCommand myCommand = new MySqlCommand("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 MySqlConnection = New MySqlConnection( _
      "User Id=root;Host=localhost;Database=Test;")
  Dim myMonitor As MySqlMonitor = New MySqlMonitor
  AddHandler myMonitor.TraceEvent, AddressOf OnEvent
  myMonitor.IsActive = True
  Dim myCommand As MySqlCommand = New MySqlCommand("select count(*) from Dept", myConn)
  myConn.Open()
  Console.WriteLine(myCommand.ExecuteScalar())
  myConn.Close()
  RemoveHandler myMonitor.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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