outlook interop application doesn't get all emails C#

Question

I'm trying to get outlook Email using Microsoft.Office.Interop.Outlook but in cases where the folder has a lot of emails (for example 1904 Emails) I'm getting only 571 emails.

here's my code:

        Application oApp = new Application();
        _NameSpace oNS = (_NameSpace)oApp.GetNamespace("MAPI");
        MAPIFolder inbox = oNS.GetDefaultFolder(OlDefaultFolders.olFolderInbox);
        var emails = inbox.Items;
        int emailsCount = emails.Count;

when I open outlook I see the number 1904 next to the Inbox folder, but when I scroll down I see the line "there are more items in this folder on the sever"

dose anyone know how can I download all my Emails using outlook interop?

BugFinder BugFinder · Accepted Answer · 2017-09-18T14:32:38

this is my code from a working app:

A lot of it seems cracking a nut with a sledge hammer however, this hasnt failed me in many years.

   MAPIFolder f;

    int retries = 0;
    while (!connected && retries < 2)
    {
        doUpdateStatus("Connecting");
        try
        {
            app = new Application();
            NameSpace ns = app.GetNamespace("MAPI");
            f = ns.GetDefaultFolder(OlDefaultFolders.olFolderInbox);
            doUpdateStatus("Connected to outlook");
            doUpdateStatus("Walking Outlook Folders .. Please wait");
            try
            {
                doUpdateStatus("");
                if (DoSync)
                {
                    try
                    {

                        doUpdateStatus("Syncing");
                        SyncObject _syncObj = null;
                        _syncObj = ns.SyncObjects.AppFolders;
                        _syncObj.SyncEnd += _syncObj_SyncEnd;
                        ns.SendAndReceive(false);
                        syncing = true;
                        _syncObj.Start();
                        while (syncing)
                        {
                            Thread.Sleep(10);
                        }
                        connected = true;
                    }
                    catch
                    {
                        doUpdateStatus("Sync failed");
                    }
                    finally
                    {
                        syncing = false;
                    }
                }
                else
                {
                    doUpdateStatus("Outlook sync disabled");
                    connected = true;
                }

            }

            catch
            {
                doUpdateStatus("Unable to connect to Outlook and Load folders");
                app.Quit();
                 retries++;
                Thread.Sleep(5000);
            }

        }
        catch
        {
            doUpdateStatus("Unable to connect to Outlook");
            if (app!=null) app.Quit();
           retries++;
            Thread.Sleep(5000);
        }
    }
    private static void _syncObj_SyncEnd()
    {
        syncing = false;
    }

outlook interop application doesn't get all emails C#

2 Answers