A log utility : Log « Development « VB.Net Tutorial

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VB.Net Tutorial » Development » Log 
7.14.2.A log utility
Imports System
Imports System.IO

public class LogTest
   public Shared Sub Main
        MyLog.Log("Started Up""C:\test.txt")
        MyLog.Log(String.Format("DisplayName called, {0} {1} output","B""A")"C:\test.txt")
   End Sub
End class

Public Class MyLog
    Const DefaultLogFile As String = "C:\LogFile.txt"

    Shared Sub Log(ByVal Message As String,ByVal FileName As String)
        Dim objLogFile As StreamWriter
        
        If IO.File.Exists(FileNameThen
            objLogFile = File.AppendText(FileName)
        ElseIf Directory.Exists (Path.GetDirectoryName(FileName)) Then
            objLogFile = File.CreateText(FileName)
        Else
            objLogFile = File.AppendText(DefaultLogFile)
        End If

        objLogFile.WriteLine(Message)
        objLogFile.Flush()
        objLogFile.Close()
    End Sub
End Class
7.14.Log
7.14.1.My.Application.Log.DefaultFileLogWriter.FullLogFileName
7.14.2.A log utility
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