Source code and example code online: Windows performance monitoring in ASP.NET(VB)

Tuesday, 26 July 2011

Windows performance monitoring in ASP.NET(VB)

This tutorial will show you how to use ASP.NET and VB to monitor Windows performance, e.g. performance counter, threads and processes.

Using the namespace of System.Diagnostics to get the data from Windows performance counter...

Imports System
Imports System.Net
Imports System.Diagnostics

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At first declare three PerformanceCounter instances, define the category and counters in performance monitor

Then display the values obtained in different Labels. Label1 is for displaying the available memory, Lable2 is for the current processes numbers, while Lable3 is used for the total processes

By the looping of PerformanceCounterCategory.GetCategories method to go through all available categories

Dim objMemperf As New PerformanceCounter("Memory", "Available Bytes")
Dim objProcperf As New PerformanceCounter("System", "Processes")
Dim objComperf As New PerformanceCounter("System", "Threads")

Label1.Text = String.Format("{0:#,###}", objMemperf.NextValue()) & "Byte"
Label2.Text = objProcperf.NextValue().ToString()
Label3.Text = objComperf.NextValue().ToString()

If Page.IsPostBack Then

For Each objPer In PerformanceCounterCategory.GetCategories

ListBox1.Items.Add(New ListItem(objPer.CategoryName))

End If
End Sub

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The front page of Default.aspx

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Using Performance Counters</title>
</head>
<body>
<form id="form1" runat="server">
<h1>Web Server Stats</h1>
These stats were taken as of <%=DateTime.Now.ToLongDateString() %> at <%=DateTime.Now.ToLongTimeString()%>....
 
 
Available:<asp:Label ID="Label1" runat="server" Width="251px"></asp:Label>
 

 
Tatol Processes:
<asp:Label ID="Label2" runat="server" Width="247px"></asp:Label>
 
 
Total Threding:<asp:Label ID="Label3" runat="server" Width="254px"></asp:Label>
 
 
 
<asp:ListBox ID="ListBox1" runat="server" Height="38px" Width="368px"></asp:ListBox> 
 
 
 
</form>
</body>
</html>

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The whole code behind front page:

Imports System.Diagnostics
Imports System.Web

Partial Class _Default

Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

Dim objMemperf As New PerformanceCounter("Memory", "Available Bytes")
Dim objProcperf As New PerformanceCounter("System", "Processes")
Dim objComperf As New PerformanceCounter("System", "Threads")
Dim objPer As New PerformanceCounterCategory
Label1.Text = String.Format("{0:#,###}", objMemperf.NextValue()) & "Byte"
Label2.Text = objProcperf.NextValue().ToString()
Label3.Text = objComperf.NextValue().ToString()

If Page.IsPostBack = False Then

For Each objPer In PerformanceCounterCategory.GetCategories

ListBox1.Items.Add(New ListItem(objPer.CategoryName))

End If

End Sub

End Class

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