How to get the Count of attachment in a particular mail

[Neeraj Kr]

Below is the code I am using to get the unread emails, checking their subject and processing accordingly. The problem is that I am getting the exception "System.ArgumentException" which says "Cannot find the method on the object instance" on the line where I am trying to find out the number of attachments in a mail. The line is - iAttachCnt = mailItem.Attachments.Count; // Here is the complete code

private void WeeklyExpenses_Load(object sender, EventArgs e)
{
Outlook.NameSpace oNs;
Outlook.MAPIFolder oFldr;

        int iAttachCnt;

        DirectoryInfo di = new DirectoryInfo(System.Environment.CurrentDirectory.ToString() + "\\\\centralexpenses\\\\" + DateTime.Now.ToString("yyMMdd") + "\\\\");
        if (!di.Exists)
        {
            di.Create();
        }
        string strPath = System.Environment.CurrentDirectory.ToString() + "\\\\centralexpenses\\\\" + DateTime.Now.ToString("yyMMdd") + "\\\\";
        //MessageBox.Show(strPath);
        try
        {
            String sClassComp = "IPM.Note";
            oOutlook = new Outlook.Application();
            
            oNs = oOutlook.GetNamespace("MAPI");
            //Outlook.Recipient rcFieldAudit = default(Outlook.Recipient);
            //rcFieldAudit = oNS.CreateRecipient("Administrator");
            //getting mail folder from inbox
            //oFldr = oNs.GetSharedDefaultFolder(rcFieldAudit, Outlook.OlDefaultFolders.olFolderInbox);
            oFldr = oNs.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox);
            Outlook.Items newMailItems = null;
            Outlook.MailItem mailItem = null;
            Outlook.Attachments atmt = null;
            newMailItems = oFldr.Items.Restrict("\[unread\] = true");
            // loop over the new mails
               
            foreach (object item in newMailItems)
            {
                if (((Outlook.MailItem)item).MessageClass == sClassComp)
                {
                    // cast from object to Outlook.MailItem
                    mailItem = (Outlook.MailItem)item;
                    if (mailItem.SenderEmailType == "EX")
                    {
                        string emailString = X4UMapi.GetMessageSenderAddress(mailItem.MAPIOBJECT).ToString();
                        int lastindex = emailString.LastIndexOf("=") + 1;
                        empEmail = emailStri

[Wendelius]

Not sure about this but what happens if you cast the mailItem to primary interface (_MailItem[^]):

iAttachCnt = ((_MailItem)mailItem).Attachments.Count;

The need to optimize rises from a bad design. My articles[^]