CODEWITHSUNDEEP
c#outlookoffice-interop
w3dev
w3dev

Reputation: 555

Using Outlook Office.Interop from a C# windows service

I just created a C# Desktop application for my personal use which reads my outlook calendar using Office.Interop libraries and posts all items to the Google calendar. It worked fine until I tried to convert it to a windows service. It always throws following error:

The file E:\...\Outlook Data File.pst cannot be opened.

I tried with different user accounts, but nothing worked. At the same time, the desktop application works as expected. Any idea?

Code:

Microsoft.Office.Interop.Outlook.Application application = null;
Microsoft.Office.Interop.Outlook.NameSpace applicationNamespace = null;
Microsoft.Office.Interop.Outlook.MAPIFolder folder = null;
Microsoft.Office.Interop.Outlook.Items calendarItems = null;

application = new Microsoft.Office.Interop.Outlook.Application();
applicationNamespace = application.GetNamespace("MAPI"); ;
folder = applicationNamespace.GetDefaultFolder(
    Microsoft.Office.Interop.Outlook.OlDefaultFolders.olFolderCalendar);
calendarItems = folder.Items;

foreach (
    Microsoft.Office.Interop.Outlook.AppointmentItem item in calendarItems)
{
    // process item
}

Upvotes: 1

Views: 4171

Answers (1)

w3dev
w3dev

Reputation: 555

It seems that Interop is not supported in an unattended, non-interactive application:

Related Stackoverflow answer: https://stackoverflow.com/a/13480267/1716736
MS article: http://support.microsoft.com/kb/257757

Upvotes: 1

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