LinqConnect Documentation
Devart.Data.Linq.Monitoring Namespace / MonitorEventArgs Class
Members Example

In This Topic
    MonitorEventArgs Class
    In This Topic
    Provides data for the TraceEvent event of the DbMonitor class.
    Syntax
    '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.
    using Devart.Data.Linq.Monitoring;
    
    ...
    
    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)
    {
    LinqMonitor linqMonitor=new LinqMonitor();
    linqMonitor.IsActive = true;
    CrmDemoContext.CrmDemoDataContext db = new CrmDemoContext.CrmDemoDataContext();
    linqMonitor.TraceEvent += new Devart.Data.Linq.Monitoring.MonitorEventHandler(OnEvent);
    var query = from it in db.Companies
        select it;
    linqMonitor.TraceEvent -= OnEvent;
    }
    }
    Imports Devart.Data.Linq.Monitoring
    
    ...
    
    Private Shared 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
    
    Private Shared Sub Main(ByVal args As String())
       Dim linqMonitor As New LinqMonitor
       linqMonitor.IsActive = True
       Dim db As New CrmDemoContext.CrmDemoDataContext
       AddHandler linqMonitor.TraceEvent, New MonitorEventHandler(AddressOf Program.OnEvent)
       Dim comp As CrmDemoContext.Company
       For Each comp In query
           Console.WriteLine(comp.CompanyName)
       Next
       RemoveHandler linqMonitor.TraceEvent, New MonitorEventHandler(AddressOf Program.OnEvent)
    End Sub
    Requirements

    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

    See Also