FirstRun info in JSON (WP) - json

Question

i have a problem with the info of a JSON in Windows Phone.
I want to show if the app is running for the first time, and if not, don't show anything.
This is my function to show info on the JSON:
async void NavigationService_Navigated(object sender, NavigationEventArgs e)
{
if (e.IsNavigationInitiator
|| !e.IsNavigationInitiator && e.NavigationMode != NavigationMode.Back)
{
var navigationInfo = new
{
Mode = e.NavigationMode.ToString(),
From = this.BackStack.Any() ? this.BackStack.Last().Source.ToString() : string.Empty,
Current = e.Uri.ToString(),
};
var jsonData = Newtonsoft.Json.JsonConvert.SerializeObject(navigationInfo);
await this.currentApplication.Client.PageView(jsonData);
}
}
I want to add one more thing where is Mode, From and Current. I want to add IsFirstRun that give as True if it's the first time i open the app.
I've seen this for firstRun function, but i don't know how to put it in my code.
public static bool IsFirstRun()
{
if (!settings.Contains(FIRST_RUN_FLAG)) //First time running
{
settings.Add(FIRST_RUN_FLAG, false);
return true;
}
return false;
}
I need help... thanks!

Answer 1

It is pretty simple if you want to create a flag for First Run,
In App.xaml.cs
Look for a function named
// Code to execute when the application is launching (eg, from Start)
// This code will not execute when the application is reactivated
private void Application_Launching(object sender, LaunchingEventArgs e)
{
}
What we want to do is create a flag inside this function and only set it to true if it doesn't exist. Like so.
using System.IO.IsolatedStorage; // include this namespace in App.xaml.cs
// Code to execute when the application is launching (eg, from Start)
// This code will not execute when the application is reactivated
private void Application_Launching(object sender, LaunchingEventArgs e)
{
if (!IsolatedStorageSettings.ApplicationSettings.Contains("first_run"))
{
IsolatedStorageSettings.ApplicationSettings.Add("first_run", true);
}
else
{
// set the flag to flase
IsolatedStorageSettings.ApplicationSettings["first_run"] = false;
}
// save
IsolatedStorageSettings.ApplicationSettings.Save();
}
Now if you want to do something on first run all you have to do is check the settings again like so:
bool first_run = (bool) IsolatedStorageSettings.ApplicationSettings["first_run"];
For debugging cases you will probably want to remove the flag so it will hit first_run again by doing this
// remove the flag and save
IsolatedStorageSettings.ApplicationSettings.Remove("first_run");
IsolatedStorageSettings.ApplicationSettings.Save();