Log Class

Reference

Definition

Namespace:: Microsoft.VisualBasic.Logging

Assembly:: Microsoft.VisualBasic.dll

Assembly:: Microsoft.VisualBasic.Forms.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Provides a property and methods for writing event and exception information to the application's log listeners.

public ref class Log

public class Log

type Log = class

Public Class Log

Inheritance: Object
Log

Derived: Microsoft.VisualBasic.Logging.AspLog

Examples

This example shows how to use the My.Application.Log.WriteEntry method to log tracing information. For more information, see How to: Write Log Messages.

Public Sub TracingTest(ByVal fileName As String)
    My.Application.Log.WriteEntry( 
        "Entering TracingTest with argument " & 
        fileName & ".")
    ' Code to trace goes here.
    My.Application.Log.WriteEntry( 
        "Exiting TracingTest with argument " & 
        fileName & ".")
End Sub

Remarks

The My.Application.Log object provides a straightforward entry point from which to access the .NET Framework's logging services. The WriteEntry and WriteException methods write messages to the application's log listeners. The listeners can be configured by the application's configuration file. For more information, see Walkthrough: Changing Where My.Application.Log Writes Information and Working with Application Logs.

The My.Application.Log object is available only for client applications. For Web applications, use My.Log. For more information, see AspLog.

The following table lists examples of tasks involving the My.Application.Log object.

To	See
Write event information to the application's log listeners	How to: Write Log Messages
Write exception information to the application's log listeners	How to: Log Exceptions
Determine where `My.Application.Log` writes information	Walkthrough: Determining Where My.Application.Log Writes Information

Constructors

Log()	Initializes a new instance of the Log class.
Log(String)	Initializes a new instance of the Log class.

Properties

DefaultFileLogWriter	Gets the file the FileLogTraceListener object that underlies the `Log` object.
TraceSource	Gets to the TraceSource object that underlies the `Log` object.

Methods

Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetType()	Gets the Type of the current instance. (Inherited from Object)
InitializeWithDefaultsSinceNoConfigExists()	Creates a new FileLogTraceListener object and adds it to the Listeners collection.
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)
WriteEntry(String, TraceEventType, Int32)	Writes a message to the application's log listeners.
WriteEntry(String, TraceEventType)	Writes a message to the application's log listeners.
WriteEntry(String)	Writes a message to the application's log listeners.
WriteException(Exception, TraceEventType, String, Int32)	Writes exception information to the application's log listeners.
WriteException(Exception, TraceEventType, String)	Writes exception information to the application's log listeners.
WriteException(Exception)	Writes exception information to the application's log listeners.

Applies to

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