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 commandbarbutto ns to a CommandBar.

The problem is when the I click on the same mail again the eventhandler for the CommandBarButto n gets added again. As a result when the CommandBarButto n 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.Collecti ons.Generic;

using System.Linq;

using System.Text;

using System.Xml.Linq ;

using Outlook = Microsoft.Offic e.Interop.Outlo ok;

using Office = Microsoft.Offic e.Core;

using System.Windows. Forms;


namespace OutlookAddIn14

{

public partial class ThisAddIn

{

Outlook.Explore r explorer = null;

Office.CommandB ar docBar = null;

Office.CommandB arPopup newMenuBar;

private string menuTag = "plugintest 14";



//Office.CommandB arButton[] btns;



System.Collecti ons.ArrayList selectedItems = new

System.Collecti ons.ArrayList() ;

System.Collecti ons.ArrayList pdf2Items = new System.Collecti ons.ArrayList() ;


private void ThisAddIn_Start up(object sender, System.EventArg s e)

{

explorer = this.Applicatio n.Explorers.App lication.Active Explorer();



explorer.Select ionChange += new Outlook.

ExplorerEvents_ 10_SelectionCha ngeEventHandler

(explorer_Selec tionChange);


docBar = explorer.Comman dBars.Add(

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



}

private void ThisAddIn_Shutd own(object sender, System.EventArg s e)

{

//RemoveMenubar() ;

}



void explorer_Select ionChange()

{

selectedItems.C lear();

pdf2Items.Clear ();



foreach (object selectedItem in explorer.Select ion)

{

Outlook.MailIte m mailItem = selectedItem as Outlook.MailIte m;

Office.CommandB arButton[] btns;



if (mailItem != null)

{

String[] mainStr;

string[] docStr;

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

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



mainStr = mailItem.Body.S plit(delim, System.StringSp litOptions.Remo veEmptyEntries) ;

foreach (string mt in mainStr)

{

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

{

docStr = mt.Split(dlm, System.StringSp litOptions.Remo veEmptyEntries) ;

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

}



}

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

if (pdf2Items.Coun t == 0)

{

docBar.Visible = false;

}

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

{

try

{

docBar.Visible = false;

docBar.Delete() ;

docBar = explorer.Comman dBars.Add(

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

}

catch (Exception ex)

{

MessageBox.Show (ex.Message);

}

int btnCnt = 0;

btns = new Office.CommandB arButton[pdf2Items.Count];

//btns.Initialize ();


foreach (string mdoc in pdf2Items)

{

Office.CommandB arButton tBtn;

tBtn = (Office.Command BarButton)docBa r.FindControl(O ffice.MsoContro lType.msoContro lButton, missing, mdoc + " - " + btnCnt, missing, false);

if (tBtn == null)

{

btns[btnCnt] = (Office.Command BarButton)docBa r.Controls.Add(

Office.MsoContr olType.msoContr olButton, missing,

missing, missing, true);

// btns[btnCnt].Click -= new Office._Command BarButtonEvents _ClickEventHand ler(Button_Clic k);

btns[btnCnt].Click += new Office._Command BarButtonEvents _ClickEventHand ler(Button_Clic k);

btns[btnCnt].Caption = mdoc;

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

btns[btnCnt].Style = Office.MsoButto nStyle.msoButto nCaption;

btns[btnCnt].FaceId = btnCnt;

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

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



}

btnCnt++;

}

docBar.Position = Microsoft.Offic e.Core.MsoBarPo sition.msoBarFl oating;

//docBar.Left = 1000;

docBar.Left = this.Applicatio n.ActiveExplore r().Left + this.Applicatio n.ActiveExplore r().Width - 200;

//docBar.Protecti on = Microsoft.Offic e.Core.MsoBarPr otection.msoBar NoMove;

docBar.Top = this.Applicatio n.ActiveExplore r().Top + 200;

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

docBar.Visible = true;

}

else

{

btns = null;

}

}

}



}






void Button_Click(Of fice.CommandBar Button 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