C# Add-in for Outlook to create array of CommandBarButton(s)

[arnott]

hi all,
I am writing a add-in for Outlook 2007 using C# and VSTO ( Visual Studio 2008). When the user clicks on each mailitem in the inbox (or any folder) in the active explorer window, the add-in needs to parse the mail and look for "pdf2:xxxx" and create and add as many commandbarbuttons to a CommandBar.

The problem is when the I click on the same mail again the eventhandler for the CommandBarButton gets added again. As a result when the CommandBarButton is clicked the event is called multiple times.

I test the code by sending a mail with many repetitions of "pdf2:". Is my approach wrong ? how to fix this bug ?

Thanks
arnott

Here is the code :

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Xml.Linq;

using Outlook = Microsoft.Office.Interop.Outlook;

using Office = Microsoft.Office.Core;

using System.Windows.Forms;


namespace OutlookAddIn14

{

public partial class ThisAddIn

{

Outlook.Explorer explorer = null;

Office.CommandBar docBar = null;

Office.CommandBarPopup newMenuBar;

private string menuTag = "plugintest14";



//Office.CommandBarButton[] btns;



System.Collections.ArrayList selectedItems = new

System.Collections.ArrayList();

System.Collections.ArrayList pdf2Items = new System.Collections.ArrayList();


private void ThisAddIn_Startup(object sender, System.EventArgs e)

{

explorer = this.Application.Explorers.Application.ActiveExplo rer();



explorer.SelectionChange += new Outlook.

ExplorerEvents_10_SelectionChangeEventHandler

(explorer_SelectionChange);


docBar = explorer.CommandBars.Add(

"Pdf2 Docs", missing, missing, true);



}

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

{

//RemoveMenubar();

}



void explorer_SelectionChange()

{

selectedItems.Clear();

pdf2Items.Clear();



foreach (object selectedItem in explorer.Selection)

{

Outlook.MailItem mailItem = selectedItem as Outlook.MailItem;

Office.CommandBarButton[] btns;



if (mailItem != null)

{

String[] mainStr;

string[] docStr;

char[] delim = { ' ', '\n', ',' };

char[] dlm = { ':', '/'};



mainStr = mailItem.Body.Split(delim, System.StringSplitOptions.RemoveEmptyEntries);

foreach (string mt in mainStr)

{

if (mt.StartsWith("pdf2:"))

{

docStr = mt.Split(dlm, System.StringSplitOptions.RemoveEmptyEntries);

pdf2Items.Add(docStr[docStr.Length-1]);

}



}

//MessageBox.Show(String.Format("mlink Count : {0} ", pdf2Items.Count));

if (pdf2Items.Count == 0)

{

docBar.Visible = false;

}

if (docBar != null && pdf2Items.Count != 0)

{

try

{

docBar.Visible = false;

docBar.Delete();

docBar = explorer.CommandBars.Add(

"Pdf2 Docs", missing, missing, true);

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

int btnCnt = 0;

btns = new Office.CommandBarButton[pdf2Items.Count];

//btns.Initialize();


foreach (string mdoc in pdf2Items)

{

Office.CommandBarButton tBtn;

tBtn = (Office.CommandBarButton)docBar.FindControl(Office .MsoControlType.msoControlButton, missing, mdoc + " - " + btnCnt, missing, false);

if (tBtn == null)

{

btns[btnCnt] = (Office.CommandBarButton)docBar.Controls.Add(

Office.MsoControlType.msoControlButton, missing,

missing, missing, true);

// btns[btnCnt].Click -= new Office._CommandBarButtonEvents_ClickEventHandler(B utton_Click);

btns[btnCnt].Click += new Office._CommandBarButtonEvents_ClickEventHandler(B utton_Click);

btns[btnCnt].Caption = mdoc;

btns[btnCnt].Tag = mdoc + " - " + btnCnt;

btns[btnCnt].Style = Office.MsoButtonStyle.msoButtonCaption;

btns[btnCnt].FaceId = btnCnt;

//btns[btnCnt].DescriptionText = "Document : " + mdoc;

//btns[btnCnt].TooltipText = "Document : " + mdoc;



}

btnCnt++;

}

docBar.Position = Microsoft.Office.Core.MsoBarPosition.msoBarFloatin g;

//docBar.Left = 1000;

docBar.Left = this.Application.ActiveExplorer().Left + this.Application.ActiveExplorer().Width - 200;

//docBar.Protection = Microsoft.Office.Core.MsoBarProtection.msoBarNoMov e;

docBar.Top = this.Application.ActiveExplorer().Top + 200;

docBar.Width = 5 * btns[0].Width;

docBar.Visible = true;

}

else

{

btns = null;

}

}

}



}






void Button_Click(Office.CommandBarButton ctrl, ref bool cancelDefault)

{



MessageBox.Show("clicked : " + ctrl.Caption);

count++;

}

[arnott]

bump !

Is there a way to check if the eventhandler is already added to the button.click object and not add it ?

Thanks