BigQueryMonitor Class

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Monitors dynamic SQL execution in applications that use dotConnect for Google BigQuery.

Syntax

Visual Basic
C#


'Declaration Public NotInheritable Class BigQueryMonitor Inherits Devart.Common.DbMonitorHelper Implements System.ComponentModel.IComponent, System.IDisposable


public sealed class BigQueryMonitor : Devart.Common.DbMonitorHelper, System.ComponentModel.IComponent, System.IDisposable

Remarks

To enable monitoring just drop BigQueryMonitor component to the form and set IsActive property to true. If dbMonitor application has already been started you can see messages and SQL statements that your application executes. For monitoring you need only one BigQueryMonitor component on any of the forms your application consists of.

For example on how to trap SQL events in your application please refer to description of TraceEvent event of Devart.Common.DbMonitor.

For monitoring multithreaded applications with dbMonitor tool you have to specify ApartmentState.MTA attribute as shown in the example below.

See also Using dbMonitor topic.

Example

This sample shows how to enable SQL monitoring in console and web applications. To activate monitoring for web applications, a Devart.Data.BigQuery.BigQueryMonitor object may be added to the Application collection at the first load of the default page.

csharp


// Console application [MTAThread] static void Main(string[] args) { BigQueryMonitor bigQueryMonitor = new BigQueryMonitor(); bigQueryMonitor.IsActive = true; ... } // Web application void Page_Load(object sender, EventArgs e) { if (Application["mon"] == null) Application.Add("mon", new Devart.Data.BigQuery.BigQueryMonitor() {IsActive = true}); }

// Console application
[MTAThread]
static void Main(string[] args)
{
        BigQueryMonitor bigQueryMonitor = new BigQueryMonitor();
        bigQueryMonitor.IsActive = true;
        ...
}

// Web application
void Page_Load(object sender, EventArgs e)
{
        if (Application["mon"] == null)
        Application.Add("mon", new Devart.Data.BigQuery.BigQueryMonitor() {IsActive = true});
}

Visual Basic


' Console application <MTAThread()> _ Sub Main() Dim bigQueryMonitor As BigQueryMonitor = New BigQueryMonitor bigQueryMonitor.IsActive = True ... End Sub // Web application Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load If Application("mon") Is Nothing Then Application.Add("mon", New Devart.Data.BigQuery.BigQueryMonitor() With {.IsActive = True}) End If End Sub

' Console application
<MTAThread()> _
Sub Main()
        Dim bigQueryMonitor As BigQueryMonitor = New BigQueryMonitor
        bigQueryMonitor.IsActive = True
        ...
End Sub

// Web application
Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
        If Application("mon") Is Nothing Then
                Application.Add("mon", New Devart.Data.BigQuery.BigQueryMonitor() With {.IsActive = True})
    End If
End Sub

Inheritance Hierarchy

System.Object
   System.MarshalByRefObject
      System.ComponentModel.Component
         Devart.Common.DbMonitor
            Devart.Common.DbMonitorHelper
               Devart.Data.BigQuery.BigQueryMonitor

Reference

BigQueryMonitor Members
Devart.Data.BigQuery Namespace

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