Recognize when is the app first launched WP8

问题

Does anybody know how can I recognize when is the app first launched? I need to show message dialog only at the first start after install. Thanks...

回答1:

You can use IsolatedStorageSettings and check for a flag.

  var settings = IsolatedStorageSettings.ApplicationSettings;
  if (!settings.Contains("WasLaunched")) {
    MessageBox.Show("First time to launch");
    settings.Add("WasLaunched", true);
  }

Note that re-deploying your app will reset the flag since its just a file saved in Isolated Storage but this should work if you launch your app from within emulator/actual device.

来源：https://stackoverflow.com/questions/16508968/recognize-when-is-the-app-first-launched-wp8