Error in foreach statement cannot operate on variable of type

Question

Hello,

I have a requirement to unread email from outlook365 using C#. For this, i am using Exchange web service (EWS). When I read emails, i am getting an error in the below line.(highlighted as bold)

foreach(EmaiMessage email in _service.FindItems(WellKnownFolderName.Inbox, new ItemView(100)))

{

}

Error : foreach statement cannot operate on variable of type 'Task<FindItemsResults<Item>>' because 'Task<FindItemsResults<Item>>' does not contain a public instance defintion for 'GetEnumerator'

DId i do anything wrong? Please suggest me.

Thanks!

Ashok Shanmugavel · Answer

Thanks, The issue has been resolved. I am not getting an error now. The issue is that I installed NuGet package Microsoft.Exchange.WebServices.NETStandard , rather than Microsoft.Exchange.WebServices by Microsoft; I installed Microsoft.Exchange.WebServices. The error is not showing now. Appreciate yours help. Thanks!

Sachin Singh · Answer

foreach(EmaiMessage email in await _service.FindItems(WellKnownFolderName.Inbox, new ItemView(100))) { } // test await works or not

Ashok Shanmugavel · Answer

No, I am getting another error in the Items. var emailMessages = findResults.Items.Cast (); --> debugger is showing an error in the Items. Error : CS1061 : 'Task >' does not contain a defintion for 'Items' and no accessible extension method 'Items' accepting a first argument of type 'Task >' could be found(are you missing a using directive or an assembly reference?)

Muhammad Imran Ansari · Answer

Try the following code: var findResults = _service.FindItems(WellKnownFolderName.Inbox, new ItemView(100)); var emailMessages = findResults.Items.Cast ();

Ashok Shanmugavel · Answer

Yes, I tried the second code snippet and i am getting an another error. Error : CS0029 : Cannot implicitly covert type 'System.Threading.Tasks.Task >' to 'Microsoft.Exchange.WebServices.Data.FindItemsResults Thanks!

Muhammad Imran Ansari · Answer

Have you tried the second code snippet?

Ashok Shanmugavel · Answer

Thanks for your reply Muhammad. When i use the below code, I am getting the error. foreach(EmaiMessage email in _service.FindItems(WellKnownFolderName.Inbox, new ItemView(100)).Items) { // Your Code } Error : CS1061 : 'Task >' does not contain a defintion for 'Items' and no accessible extension method 'Items' accepting a first argument of type 'Task >' could be found(are you missing a using directive or an assembly reference?) I am included all the namespace but still getting this error. Thanks!

Muhammad Imran Ansari · Answer

There is no iterator/GetEnumerator() method on FindItems method. Change your foreach like: foreach (EmaiMessage email in _service.FindItems(WellKnownFolderName.Inbox, new ItemView(100)).Items) { // Your Code } OR use the code like: // First send the request to fetch the Inbox and get the results. FindItemsResults findResults = _service.FindItems(WellKnownFolderName.Tasks, new ItemView(100)); // Process each item as per typr. foreach (Item myItem in findResults.Items) { if (myItem is EmailMessage) Console.WriteLine((myItem as EmailMessage).Subject); else if (myItem is MeetingRequest) Console.WriteLine((myItem as MeetingRequest).Subject); else // Else handle other item types. }