LogExtension

LogExtension.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.Serialization;
using System.Collections;
using System.Reflection;
namespace PersistExtensionAddIn
{
  public class LogExtension : ESRI.ArcGIS.Desktop.AddIns.Extension
  {
    Dictionary<string, string> _log;

    public LogExtension()
    {
    }

    protected override void OnStartup()
    {
      WireDocumentEvents();
    }

    private void WireDocumentEvents()
    {
      // Named event handler
      ArcMap.Events.OpenDocument += new ESRI.ArcGIS.ArcMapUI.IDocumentEvents_OpenDocumentEventHandler(Events_OpenDocument);
    }


    void Events_OpenDocument()
    {
      string logText = "Document was saved by " + _log["userName"]
                            + " at " + _log["time"];
      LogMessage(logText);
    }

    //Get called when saving document.
    protected override void OnSave(Stream outStrm)
    {
        // Override OnSave and uses a binary formatter to serialize the log.
      Dictionary<string, string> log = new Dictionary<string, string>();
      log.Add("userName", Environment.UserName);
      log.Add("time", DateTime.Now.ToLongTimeString());
      var bf = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
      bf.Serialize(outStrm, log);
    }
    
    //Get called when opening a document with persisted stream.
    protected override void OnLoad(Stream inStrm)
    {
        // Override OnLoad and uses a binary formatter to deserialize the log.
      var bf = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
      _log = (Dictionary<string, string>)bf.Deserialize(inStrm);
    }

    private void LogMessage(string message)
    {
      System.Windows.Forms.MessageBox.Show(message);
    }
  }

}

LogExtension.vb

Imports Microsoft.VisualBasic
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.IO
Imports System.Runtime.Serialization.Formatters.Binary
Imports System.Runtime.Serialization
Imports System.Collections
Imports System.Reflection
Namespace PersistExtensionAddIn
  Public Class LogExtension
	  Inherits ESRI.ArcGIS.Desktop.AddIns.Extension
	Private _log As Dictionary(Of String, String)

	Public Sub New()
	End Sub

	Protected Overrides Sub OnStartup()
	  WireDocumentEvents()
	End Sub

	Private Sub WireDocumentEvents()
	  ' Named event handler
	  AddHandler ArcMap.Events.OpenDocument, AddressOf Events_OpenDocument
	End Sub


	Private Sub Events_OpenDocument()
	  Dim logText As String = "Document was saved by " & _log("userName") & " at " & _log("time")
	  LogMessage(logText)
	End Sub

	'Get called when saving document.
	Protected Overrides Sub OnSave(ByVal outStrm As Stream)
            ' Override OnSave and uses a binary formatter to serialize the log.
	  Dim log As New Dictionary(Of String, String)()
	  log.Add("userName", Environment.UserName)
	  log.Add("time", DateTime.Now.ToLongTimeString())
	  Dim bf = New System.Runtime.Serialization.Formatters.Binary.BinaryFormatter()
	  bf.Serialize(outStrm, log)
	End Sub

	'Get called when opening a document with persisted stream.
	Protected Overrides Sub OnLoad(ByVal inStrm As Stream)
            ' Override OnLoad and uses a binary formatter to deserialize the log.
	  Dim bf = New System.Runtime.Serialization.Formatters.Binary.BinaryFormatter()
	  _log = CType(bf.Deserialize(inStrm), Dictionary(Of String, String))
	End Sub

	Private Sub LogMessage(ByVal message As String)
	  System.Windows.Forms.MessageBox.Show(message)
	End Sub
  End Class

End Namespace