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I have read everything I can find and tried all of them,but cannot get past this null reference exception. Here is my code that is failing
try
{
Analytics.TrackEvent("In iCloud.aspx.cs, BackUpClicked Date = " + sDate.Date + " autoId = " + Convert.ToInt32(Application.Current.Properties["autoId"]));
var count = await DependencyService.Get<IMessage>().BackupToiCloud(Convert.ToInt32(Application.Current.Properties["autoId"]), sDate.Date.ToString("MMddyyyy"));
EntMessage = count.ToString() + " Records Backed Up";
}
catch (Exception ex)
{
Crashes.TrackError(ex);
Analytics.TrackEvent("Exception in BackUpClicked Method" + ex.ToString());
}
I have read that I need to implement Dependency service for both platforms I have in my solution so I have the following line below in my AppDelegete.cs for iOS and for Android, I have the same line in my MainActivity.cs
Xamarin.Forms.DependencyService.Register<MessageService>();
In my iOS project, I have the MessageService defined as follows,
[assembly: Dependency(typeof(MileageManagerForms.iOS.MessageService))]
namespace MileageManagerForms.iOS
{
public class MessageService : IMessage
and for the android project I have MessageService defined as follows,
[assembly: Dependency(typeof(MileageManagerForms.Droid.MessageService))]
namespace MileageManagerForms.Droid
{
public class MessageService : IMessage
I am not quite clear what else I need to do. One thing I found was promoting this syntax to register, but when I did that, it told me I was missing the default constructor from MessageService which is bogus.
Xamarin.Forms.DependencyService.Register<IMessage, MessageService>();
In looking at examples of code, it appeared that the registration of the dependency service had to happen under this line of code in the appDelegate and MainActivity,
LoadApplication(new App());
is this correct? I know there are a thousand posts specifically on this subject, but it you can see something I am doing wrong, I would greatly appreciate it. Thanks so much.
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