c# outlook addin to process incoming mails

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Hi All,

I have created add-in to read outlook incoming mails.But My issue is Addin working for the first time of outlook opening.

Example: If I close and open outlook , for the first incoming mail its working(showing my custom message), for second mail onwards its not showing custom messge.

I repeated this process. Only first time its working.

C#

private void ThisAddIn_Startup(object sender, System.EventArgs e)
        {
            Outlook.MAPIFolder inbox = Application.Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox);
            inbox.Items.ItemAdd += new Outlook.ItemsEvents_ItemAddEventHandler(InboxFolderItemAdded);
        }

C#

private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
{
}
private void InboxFolderItemAdded(object Item)
{
    if (Item is Outlook.MailItem)
    {       
        // New mail item in inbox folder
        MessageBox.Show("you got mail");
    }
}

Please help me.

Thanks in advance.

Posted 6-Nov-14 0:04am

Prasannala

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DamithSL · Accepted Answer · 2014-11-06T00:37:00

check below sample from MSDN[^]

C#

Outlook.NameSpace outlookNameSpace;
Outlook.MAPIFolder inbox;
Outlook.Items items;

private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
    outlookNameSpace = this.Application.GetNamespace("MAPI");
    inbox = outlookNameSpace.GetDefaultFolder(
            Microsoft.Office.Interop.Outlook.
            OlDefaultFolders.olFolderInbox);

    items = inbox.Items;
    items.ItemAdd +=
        new Outlook.ItemsEvents_ItemAddEventHandler(items_ItemAdd);
}

void items_ItemAdd(object Item)
{
    string filter = "USED CARS";
    Outlook.MailItem mail = (Outlook.MailItem)Item;
    if (Item != null)
    {
        if (mail.MessageClass == "IPM.Note" &&
                   mail.Subject.ToUpper().Contains(filter.ToUpper()))
        {
            mail.Move(outlookNameSpace.GetDefaultFolder(
                Microsoft.Office.Interop.Outlook.
                OlDefaultFolders.olFolderJunk));
        }
    }

}

Items object in your case will be garbage collected after leaving that block of code, you can create class level variable(as MSDN sample code) and then hook the event to that object.