Intersoft Community - Crosslight - OrderBy throws exception : Sequence contains no matching element

OrderBy throws exception : Sequence contains no matching element

technical@intersoftpt.com — Fri, 02 Jan 2015 18:15:36 GMT

Hello Leo,

For the instruction to upgrade to Crosslight iOS Unified and Xamarin iOS Unified, please check out our blog here.

FYI, the original error that you submitted actually have nothing to do with iOS Unified. The error was caused bythe Linker stripping out the classes required by Crosslight. The solution is quite simple, go to the Project Properties of the iOS project, select iOS Build, then put in the following syntax to the "Additional mtouch argument" textbox.


--linkskip=System.Core

Rebuild your project and run the app to your iOS device. Your apps should be working fine now.

Hope this helps.

OrderBy throws exception : Sequence contains no matching element

hongliyu2002 — Wed, 24 Dec 2014 07:05:02 GMT

Xamarin iOS 8.6.0.41?

I don't have this version. The latest stable version of Xamarin iOS is 8.4.0.47 in my download list.

By the way, when I updated my Crosslight 3 to version Update 1 (Xamarin iOS 8.4.0.47 is used), I found some bugs such as:

Unhandled Exception (System.MissingMethodException: Method not found: 'MonoTouch.UIkit.UITableView.RegisterNibForCellReuse') throws in OnViewCreated() in ViewController.
When changed to Unified API, the app cannot build : 'Failed to resolve "UIKit.IUISplitViewControllerDelegate UIKit.UISplitViewController::get_Delegate()" reference from "Xamarin.iOS, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065" MessageInputSamples.iOS' .

In oringnal version there is no problem.

Please tell me how I can update the Xamarin iOS to version 8.6, Thanks. Maybe wait for the official release..

OrderBy throws exception : Sequence contains no matching element

yudi — Wed, 24 Dec 2014 01:35:08 GMT

I tried to replicate the reported problem using MyInventory sample. I copy the snippet code of OnSourceItemsChanged and apply them into the ItemListViewModel of MyInventory sample; save the changes; and install the app to device.
Everything worked smoothly on device and emulator.

Could you please try to replicate this on MyInventory sample as I did and let me know the result.

Following information will be very helpful to determine what may cause the problem.

Crosslight version -- I'm using Crosslight 3 Update 1
Xamarin.iOS version -- I'm using Xamarin.iOS version 8.6.0.41
the device -- I'm using iPhone 4s iOS 7.1

Look forward to hearing back from you.

OrderBy throws exception : Sequence contains no matching element

hongliyu2002 — Mon, 22 Dec 2014 06:55:20 GMT

When I test my App on the iPhone devices (iPhone 4s/iOS 7.0, iPhone 6/iOS 8.0), InvalidOperationException "Sequence contains no matching element" is throwed in the "items.OrderBy(sortDescriptions)" method. It is ok when App runs on the iOS simulator. I don't know why...

Please take a look. It also happens in the DataListViewModelBase<TModel, TRepository> in Intersoft.AppFramework assembly.