How do i access a shared calendar using EWS Managed API

1
votes

How can retrieve only shared calendar using Exchange EWS API.

How can i know which calendar is shared using Exchange EWS API.

1
exchangewebservices
Firstly i call all my calendar by using below code FolderView fvFolderView = new FolderView(1000); fvFolderView.Traversal = FolderTraversal.Deep; SearchFilter sfSearchFilter = new SearchFilter.IsEqualTo(FolderSchema.FolderClass, "IPF.Appointment"); FindFoldersResults ffoldres = service.FindFolders(new FolderId(WellKnownFolderName.Root, "email@address"), sfSearchFilter, fvFolderView); Now i get 3 calendar include one shared calendar. Need to Find shared calendar. – Vikram Singh

1 Answers

4
votes

You can just specify the calendar, which you want to acces in your FolderId. 

FolderId folderIdFromCalendar = new FolderId(WellKnownFolderName.Calendar, "[email protected]");

You can then use the folderIdFromCalendar for retrieving the calendar items, you want, e.g.:

FindItemsResults<Item> appointments = ExchangeServive.FindItems(folderIdFromCalendar, ItemView);

Remember that the program has to be run in the context of a user, which the mailbox is shared with.

Update:

If you happen to know the FolderId, you can just check, if the current user has access to this calendar by performing this code:

As above, you will need to initialize a FolderId:

FolderId folderIdFromCalendar = new FolderId("AQMkADAwATM3ZmYAZS1kNjE0LWU1ZmQtMDACLTAwCgAuAAADJRMtiupYBUGD‌​cKdcqUrr3AEA1/sqwbrw‌​UEeFM0Mc+UBFoQAAABzk‌​m1sAAAA=");

After that, try the following code:

if (folderIdFromCalendar != null)
    {
        try
        {
            ItemView cView = new ItemView(1000);
            FindItemsResults<Item> appointments = service.FindItems(folderIdFromCalendar, cView);
            int count = appointments.TotalCount; //just an example of some random action on the folder calendar
        }
        catch (ServiceResponseException ex)
        {
            Console.WriteLine("The specified calendar was not shared with you. \n" + ex);
        }
    }
    else
    {
        Console.WriteLine("The specified calendar ID could not be linked to a calendar folder.");
    }

Another Update:

if (folderIdFromCalendar != null)
    {
        if (folderIdFromCalendar.Mailbox.ToString().ToLower() == "your-Mailadress".ToLower())
        {
            Console.WriteLine("The folder you specified is your own");
        }
        else
        {
            try
            {
                ItemView cView = new ItemView(1000);
                FindItemsResults<Item> appointments = service.FindItems(folderIdFromCalendar, cView);
                int count = appointments.TotalCount; //just an example of some random action on the folder calendar
                Console.WriteLine("You have been given access to this mailbox. Its owner is: " + folderIdFromCalendar.Mailbox.ToString()); //if you need to know, whos mailbox you are accessing right now
            }
            catch (ServiceResponseException ex)
            {
                Console.WriteLine("The specified calendar was not shared with you. \n" + ex);
            }
        }
    }
    else
    {
        Console.WriteLine("The specified calendar ID could not be linked to a calendar folder.");
    }

Last Update:

I have googled quite a bit now and found something that worked for me. But to be perfectly honest, I don't understand everything, which is going on in the following code:

FolderId folderIdFromCalendar = new FolderId("AQMkADAwATM3ZmYAZS1kNjE0LWU1ZmQtMDACLTAwCgAuAAADJRMtiupYBUGD‌​cKdcqUrr3AEA1/sqwbrw‌​UEeFM0Mc+UBFoQAAABzk‌​m1sAAAA=");
    Folder folderFromCalendar = Folder.Bind(service, folderIdFromCalendar);

    AlternateId aiAlternateid = new AlternateId(IdFormat.EwsId, folderFromCalendar.Id.UniqueId, "[email protected]");
    AlternateIdBase aiResponse = service.ConvertId(aiAlternateid, IdFormat.EwsId);

    var mailbox = ((AlternateId)aiResponse).Mailbox;

    if (folderFromCalendar != null)
    {
        if (mailbox.ToString().ToLower() == "your-Mailadress".ToLower())
        {
            Console.WriteLine("The folder you specified is your own");
        }
        else
        {
            try
            {
                ItemView cView = new ItemView(1000);
                FindItemsResults<Item> appointments = service.FindItems(folderIdFromCalendar, cView);
                int count = appointments.TotalCount; //just an example of some random action on the folder calendar
                Console.WriteLine("You have been given access to this mailbox. Its owner is: " + mailbox.ToString());
            }
            catch (ServiceResponseException ex)
            {
                Console.WriteLine("The specified calendar was not shared with you. \n" + ex);
            }
        }
    }
    else
    {
        Console.WriteLine("The specified calendar ID could not be linked to a calendar folder.");
    }

I don't understand, how the string "[email protected]" affects anything in that program, but the syntax needs a string there.