How do i access a shared calendar using EWS Managed API - exchangewebservices

Question

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

Answer 1

You can just specify the calendar, which you want to acces in your FolderId.
FolderId folderIdFromCalendar = new FolderId(WellKnownFolderName.Calendar, "sharedInbox#example.com");
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, "random#mailadress.com");
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 "random#mailadress.com" affects anything in that program, but the syntax needs a string there.