exchange server - Error when I try to read/update the .Body of a Task via EWS Managed API - "You must load or assign this property before you can read its value."

Question

I am using the Exchange Web Services Managed API to work with Tasks (Exchange 2007 SP1). I can create them fine. However, when I try to do updates, it works for all of the fields except for the .Body field. Whenever I try to access (read/update) that field, it gives the following error:

"You must load or assign this property before you can read its value."

The code I am using looks like this:

   //impersonate the person whose tasks you want to read
   Me.Impersonate(userName); //home-made function to handle impersonation

   //build the search filter
   Exchange.SearchFilter.SearchFilterCollection filter = New Exchange.SearchFilter.SearchFilterCollection();
   filter.Add(New Exchange.SearchFilter.IsEqualTo(Exchange.TaskSchema.Categories, "Sales"));

   //do the search
   EWS.Task exTask = esb.FindItems(Exchange.WellKnownFolderName.Tasks, filter, New Exchange.ItemView(Integer.MaxValue));

   exTask.Subject = txtSubject.Text;  //this works fine
   exTask.Body = txtBody.Text; //This one gives the error implying that the object isn't loaded

The strange thing is that, inspecting the property bag shows that the object contains 33 properties, but {Body} is not one of them. That property seems to be inherited from the base class .Item, or something.

So, do I need to re-load the object as type Item? Or reload it via .Bind or something? Keep in mind that I need to do this with thousands of items, so efficiency does matter to me.

Answer 1

Calling the Load method solved my problem :)

foreach (Item item in findResults.Items)
        {                
            item.Load();
            string subject = item.Subject;
            string mailMessage = item.Body;
        }