/// <summary>
/// Set Up the subscription to the Message Hub
/// </summary>
private async Task <bool> SetUpSubscription()
{
try
{
if (PushManager.IsSupported)
{
var subscription = await PushManager.SubscribeAsync(dhp.PublicKey, "myChannel1");
_subscriptionJson = subscription.ToJson();
var applicationData = Windows.Storage.ApplicationData.Current;
var localSettings = applicationData.LocalSettings;
//localSettings.Values["WNSChannelURI"] = _subscriptionJson.ToString();
localSettings.Values["WNSChannelRegistrationId"] = _subscriptionJson.ToString();
return(true);
}
else
{
return(false);
}
}
catch (Exception ex)
{
App.LogException(ex);
return(false);
}
}
/// <summary>
/// Resubscribes to the service whenever the registration is invalid ( Expiration date is due)
/// </summary>
private async Task <bool> ReSubscription()
{
try
{
var applicationData = Windows.Storage.ApplicationData.Current;
var localSettings = applicationData.LocalSettings;
var registrationId = localSettings.Values["WNSChannelRegistrationId"];
DateTime regDateObject = new DateTime(1, 1, 1);
if (registrationId == null || registrationId == "")
{
localSettings.Values["UWPUninstallCheck"] = true;
}
else
{
if (PushManager.IsSupported)
{
var regJson = registrationId.ToString();
var regObject = JsonObject.Parse(regJson);
string dateReg = regObject["expirationTime"].ToString().Replace("{", "").Replace("}", "").Replace("\"", "");
regDateObject = Convert.ToDateTime(dateReg);
if (regDateObject < DateTime.Now)
{
var subscription = await PushManager.SubscribeAsync(dhp.PublicKey, "myChannel1");
_subscriptionJson = subscription.ToJson();
var _subscriptionJsonCheck = _subscriptionJson.ToString();
if (registrationId != _subscriptionJsonCheck)
{
localSettings.Values["WNSChannelRegistrationId"] = _subscriptionJson;
localSettings.Values["WNSChannelRegistrationIdCheck"] = true;
}
else
{
localSettings.Values["WNSChannelRegistrationIdCheck"] = !true;
}
}
else
{
localSettings.Values["WNSChannelRegistrationIdCheck"] = !true;
}
}
}
return(true);
}
catch (Exception ex)
{
App.LogException(ex);
return(true);
}
}
/// <summary>
/// Validates the current expiration date when the background task requests it
/// </summary>
/// <returns></returns>
private async Task <int> validateExpirationDate()
{
int result = 0;
try
{
if (LastExpirationDateVerification < DateTime.Now.AddDays(-1))
{
var applicationData = Windows.Storage.ApplicationData.Current;
var localSettings = applicationData.LocalSettings;
ExpirationDate = GetExpirationdate(ExpirationDate);
if (ExpirationDate < DateTime.Now.AddDays(-1))
{
//resubscribe
var subscription = await PushManager.SubscribeAsync(dhp.PublicKey, "myChannel1");
string _subscriptionJson = subscription.ToJson();
var regObject = JsonObject.Parse(_subscriptionJson);
string dateReg = regObject["expirationTime"].ToString().Replace("{", "").Replace("}", "").Replace("\"", "");
//Update expiration date to localstorage
ExpirationDate = Convert.ToDateTime(dateReg);
string stringDate = $"{ExpirationDate.Year},{ExpirationDate.Month},{ExpirationDate.Day},{ExpirationDate.Hour},{ExpirationDate.Minute},{ExpirationDate.Second}";
localSettings.Values["ExpirationTime"] = stringDate;
renewSubscription();
result = 2;
}
LastExpirationDateVerification = DateTime.Now;
}
}
catch (Exception ex)
{
result = -1;
LogException(ex);
}
return(result);
}
private async void SetUpSubscription()
{
try
{
// If your app's min version is lower than 15063, you have to check whether PushManager is supported
if (PushManager.IsSupported)
{
var subscription = await PushManager.SubscribeAsync(WebPush.PublicKey, "myChannel1");
_subscriptionJson = subscription.ToJson();
ButtonPushToSelf.IsEnabled = true;
TextBoxSubscriptionJson.Text = _subscriptionJson;
}
else
{
TextBoxSubscriptionJson.Text = "PushManager is not supported on this version of Windows.";
}
}
catch (Exception ex)
{
await new MessageDialog(ex.ToString()).ShowAsync();
}
}
