Try/Catch not working for WP8 C# .NET with Azure Mobile Services

问题

I'm playing around with this block of code:

 try
 {
   mscvUser = imstUser
    .Where(User => User.Id == intId)
    .Take(1000)
    .ToCollectionView();
 }
 catch(MobileServiceInvalidOperationException f){

  MessageBox.Show(f.ToString());

 }

It works fine normally, but I've been deliberately disconnecting my Internet for testing purposes, and I keep hitting MobileServiceInvalidOperationException, but it won't catch it in that block; it throws it back to App.xaml.cs, breaks, and shuts down the app.

回答1:

I think you are not using the newest version of Azure Mobile Services. The SDK was recently updated to version 1.0: http://nuget.org/packages/WindowsAzure.MobileServices/

I checked with this version and the exception is catched correctly.

In the newest version, "ToCollectionView" was replaced and you'd now have to use

try
 {
   mscvUser = await imstUser
    .Where(User => User.Id == intId)
    .Take(1000)
    .ToCollectionAsync();
 }
 catch(MobileServiceInvalidOperationException f){

  MessageBox.Show(f.ToString());

 }

Hope this helps

edit: Here from the changelog:

MobileServiceTable.ToCollectionView() is now ToCollection(): the collection view implementation had some bugs, and it has been rewritten.

As you can read here

来源：https://stackoverflow.com/questions/17232794/try-catch-not-working-for-wp8-c-sharp-net-with-azure-mobile-services