How Do I...? Common Tasks QuickStart Tutorial
How Do I...Read from an event log?
Event logging provides a standard, centralized way for you
to have your applications record important software and hardware events. Windows
supplies a standard user interface for viewing the logs (Event Log).
Using the Microsoft .NET Framework's EventLog component, you can easily connect to existing event
logs on both local and remote computers, and read entries from these logs programmatically.
This sample illustrates how to enumerate entries in an event
log. It is a small console application that can be run from a command prompt.
The application takes two command line arguments. The first argument is the name
of the log that you want to enumerate. The second argument is optional and allows you to
specify the machine name of the server on which the log resides.
Try running the sample as follows:
> LogInfo.exe Application
The sample will list all the entries from the application log. You can try the same
with the System, Security, and any other logs residing on your machine.
In its simplest form, writing to an event log involves:
- Creating a new instance of an EventLog component and pointing it to an appropriate event log:
Dim log, machine As String
...
Dim aLog As New EventLog
aLog.Log = log
aLog.MachineName = machine
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- Enumerating through the Entries collection of the EventLog instance:
For Each entry In alog.Entries
Console.WriteLine(" Entry: " + entry.Message)
Next entry
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Example
VB LogInfo.exe
[This sample can be found at H:\Home\WU_000036_efe47225c86ca62f325a01d8519bc002\Webs\aspnet.sk\quickstarts\QuickStartv20\howto\samples\Services\EventLog\LogInfo\
To build this sample, open the SDK command prompt and navigate to the above path. Build the sample using the build tool msbuild
passing the solution file as the first parameter: msbuild mySample.sln. The compiled executable will be found in the sub directory \bin
directory.]
Microsoft .NET Framework SDK QuickStart Tutorials Version 2.0
Copyright � 2005 Microsoft Corporation. All rights reserved.
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