Outlook 2007 Add-in Using Microsoft Visual C#.NET- Part 2

• Download addin - 74.77 KB

Table of Contents

• Introduction
• What we learn?
  • How to create an Outlook7 AddIn project
  • How to create category tag
  • How to Add menu Item into Outlook application context menu
• Reference
• Conclusion

Introduction

Last year, I wrote an article which is about “Outlook 2007 Add-in Using Microsoft Visual C#.NET” where we discussed how to develop an add-in for Microsoft Office Outlook 2007 to help a fictitious company. How to add custom menus, toolbar command button, custom tabs (Outlook 2007), work with ribbon and custom forms as well. Anyway, if you are a beginner, I would like to request you to please read my first article from the link below:

• Outlook 2007 Add-in Using Microsoft Visual C#.NET - Part 1.

Well, if you familiar with that, then I would say go ahead.

*** Please note that I used Microsoft Visual Studio 2010, Framework 4.0.

What We Learn

In this article, we will not discuss about creating custom menus, toolbar command button, custom tabs, etc. Our main objective will be how we can communicate with the Microsoft Office Outlook using “Microsoft.Office.Interop.Outlook” delegate & event. Well let’s think we want to create an Outlook AddIn which will be able to do the following:

• Objective - 1. Inform you when new mail arrives
• Objective - 2. Display item location (path) when you click on a particular object like an email or subfolders, etc.
• Objective - 3. Able to create new category tags.

I think it’s pretty interesting! Isn’t it? So what are we waiting for, let's start creating this addIn. More information on the Outlook API delegate & event could be found at this link.

Create an Outlook7 AddIn project

I hope that you have the basic knowledge on how to create a Microsoft Office Outlook AddIn project using Microsoft Visual Studio 2008 or its May 2010. So if you are not comfortable with that, I would like to request you to read the first part of this article from this link.

Well, let’s implement our objective. Create a Microsoft Office Outlook AddIn project from your Microsoft Visual Studio 2008 / 2010. Now we will write our first code to achieve our first task, i.e., informing you when new emails arrive. But how could we do that?

Objective 1. Inform you when new mail arrive

Well, we will use a delegate (ApplicationEvents_11_NewMailEventHandler Delegate) for that. You might have a question as to what this delegate does? Simply I can say that this is a delegate for an event in the corresponding object. The following code snippets example will fulfill our first objective.

private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
    this.Application.NewMail += new ApplicationEvents_11_NewMailEventHandler(EmailArrived);
}

private void EmailArrived()
{
    MessageBox.Show("Hello !!! You have new emails. ");
}

The following figure A shows the output of the code above.

Figure A

More information about ApplicationEvents_11_NewMailEventHandler Delegate could be found at this link.

Objective -2. Display item location (path) when clicking on a particular object like an email or subfolders, etc.

To obtain pacific location / path of an item, we will use another delegate (ApplicationEvents_11_ItemLoadEventHandler) for that. The below code snippet does this job for us:

private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
    this.Application.ItemLoad += 
           new ApplicationEvents_11_ItemLoadEventHandler(GetMailItemLocation);
}
private void GetMailItemLocation(object Item)
{	
    if (outlookObj.ActiveExplorer().CurrentFolder != null)
    {
      var mailItem = outlookObj.ActiveExplorer().CurrentFolder;
      Outlook.MAPIFolder oFolder = (Outlook.MAPIFolder)mailItem;
      MessageBox.Show("Hello !!! I am located at 
		{" + oFolder.FolderPath.ToString() + "}");
    }
}

The following figure B shows the output of the code above.

Figure B

More information about ApplicationEvents_11_ItemLoadEventHandler could be found at this link.

How to Create a Category Tag

Objective 3. Able to create new category tags

Okay, great! Now we will create a custom category, well Microsoft Office Outlook has few number of categories, so we need to apply a little check that the category we are creating already exists or not. Anyway, the code below will create a category.

private void AddCategory(string categoryName, object olCategoryColor)
      {
          if (AllowToAddCategory(categoryName))
          {
              outlookObj = new Outlook.Application();
              Outlook.Categories olCategoryList = outlookObj.Session.Categories;
              olCategoryList.Add(categoryName,
          Outlook.OlCategoryColor.olCategoryColorDarkOrange);
              MessageBox.Show("Category [ " + categoryName  + " ]
          successfully created.");
              this.Close();
          }
          else
          {
              MessageBox.Show("This category already exist.");
          }
      }

      private bool AllowToAddCategory(string categoryName)
      {
          bool retValue = false;
          outlookObj = new Outlook.Application();
          Outlook.Categories olCategoryList = outlookObj.Session.Categories;

          foreach (Outlook.Category category in olCategoryList)
          {
              if (category.Name.Equals(categoryName))
              {
                  retValue = false;
                  return retValue;
              }
              else { retValue = true; }
          }

          return retValue;
      }

      private void buttonCancel_Click(object sender, EventArgs e)
      {
          this.Close();
      }

      private void buttonOK_Click(object sender, EventArgs e)
      {
          if (this.textBoxCategory.Text != null)
          {
              this.AddCategory(textBoxCategory.Text, null);
          }
      }

The following figure C shows the input category name to create a new category.

Figure C

The following figure D, shows the output of our new category.

Figure D

How to Add menu Item into Outlook Application Context Menu

To add an item into Microsoft Office Outlook context menu, we need to use the ApplicationEvents_11_ItemContextMenuDisplayEventHandler delegate. More information on ApplicationEvents_11_ItemContextMenuDisplayEventHandler could be found at this link.

The below code snippets will add the custom menu item into the application context menu.

private void ThisAddIn_Startup(object sender, System.EventArgs e)
       {
           olInspectors = this.Application.Inspectors;
           olInspectors.NewInspector +=
       new InspectorsEvents_NewInspectorEventHandler(GetMailItemEntryId_Click);
            outlookObj = new Outlook.Application();
           this.Application.ItemContextMenuDisplay +=
       new Outlook.ApplicationEvents_11_ItemContextMenuDisplayEventHandler
           (Application_ItemContextMenuDisplay);
           this.Application.NewMail +=
       new ApplicationEvents_11_NewMailEventHandler(EmailArrived);
           this.Application.ItemLoad +=
       new ApplicationEvents_11_ItemLoadEventHandler(GetMailItemLocation);
         }

       private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
       {
       }

       #region VSTO generated code

       /// <summary>
       /// Required method for Designer support - do not modify
       /// the contents of this method with the code editor.
       /// </summary>
       private void InternalStartup()
       {
           this.Startup += new System.EventHandler(ThisAddIn_Startup);
           this.Shutdown += new System.EventHandler(ThisAddIn_Shutdown);
       }

       #endregion

       #region Private Methods

       private void Application_ItemContextMenuDisplay
       (Office.CommandBar CommandBar, Outlook.Selection Selection)
       {
           if (Selection[1] is Outlook.MailItem)
           {
               this.CustomContextMenu(CommandBar, Selection);
               this.CustomContextCategoryMenu(CommandBar, Selection);
           }
       }

       private void CustomContextCategoryMenu
       (Office.CommandBar CommandBar, Outlook.Selection Selection)
       {

           Office.CommandBarButton customContextMenuTag =
                       (Office.CommandBarButton)CommandBar.Controls.Add
                   (Office.MsoControlType.msoControlButton
                                           , Type.Missing
                                           , Type.Missing
                                           , Type.Missing
                                           , true);

           customContextMenuTag.Caption = "Create category";
           customContextMenuTag.FaceId = 445;
           customContextMenuTag.Click +=
       new Office._CommandBarButtonEvents_ClickEventHandler
       (customContextMenuCategoryTag_Click);

       }

       private void CustomContextMenu(Office.CommandBar CommandBar,
                   Outlook.Selection Selection)
       {

           Office.CommandBarButton customContextMenuTag =
                         (Office.CommandBarButton)CommandBar.Controls.Add
               (Office.MsoControlType.msoControlButton
                                    , Type.Missing
                                    , Type.Missing
                                    , Type.Missing
                                    , true);

           customContextMenuTag.Caption = "My Menu";
           customContextMenuTag.FaceId = 446;
           customContextMenuTag.Click +=
      new Office._CommandBarButtonEvents_ClickEventHandler(customContextMenuTag_Click);
       }
       #endregion

       #region Events Handler
       private void customContextMenuTag_Click
       (Office.CommandBarButton Ctrl, ref bool CancelDefault)
       {
           MessageBox.Show("Hello !!! Happy Programming. ");
       }

       private void customContextMenuCategoryTag_Click
       (Office.CommandBarButton Ctrl, ref bool CancelDefault)
       {

           CategoryDialog categoryDialog = new CategoryDialog();
           categoryDialog.ShowDialog();
       }

       #endregion
   }

The following figure E shows the created menu items.

Figure E

Reference

• Microsoft Development Network

Conclusion

I hope this might be helpful to you!!!

History

• 27^th Aug 2011: Initial post