/// <summary>
/// Anmeldedaten prüfen, lokal speichern und an den Server melden
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
async void Save(object sender, EventArgs e)
{
if (!string.IsNullOrWhiteSpace(Nutzername))
{
Nutzername = Nutzername.ToLower();
bool?exists = AllVM.Datenbank.User.Exists(Nutzername);
if (exists == true)
{
string pw = AllVM.Datenbank.User.GetPasswort(Nutzername);
string hpw = AllVM.HashPassword(Passwort);
if (hpw == pw)
{
AllVM.Initial(Nutzername);
Application.Current.Properties.Clear();
Application.Current.Properties.Add("userid", Nutzername);
Application.Current.Properties.Add("userpw", pw);
await Application.Current.SavePropertiesAsync();
App.Current.MainPage = new AppShell();
}
else
{
DependencyService.Get <IMessage>().ShortAlert("Passwort stimmt nicht!");
}
}
else if (exists == false)
{
DependencyService.Get <IMessage>().ShortAlert("Nutzername unbekannt");
}
else
{
DependencyService.Get <IMessage>().ShortAlert("Fehler beim Prüfen");
}
}
else
{
DependencyService.Get <IMessage>().ShortAlert("Nutzername eingeben!");
}
}
/// <summary>
/// Lokale Variablen prüfen und ggf. automatisch Anmelden
/// </summary>
private void AutoLogin()
{
string user = null, passwort = null;
try
{
var current = Connectivity.NetworkAccess;
if (current == NetworkAccess.Internet)
{
if (Current.Properties.ContainsKey("userid"))
{
if (Current.Properties["userid"] != null)
{
user = Current.Properties["userid"].ToString();
}
}
if (Current.Properties.ContainsKey("userpw"))
{
if (Current.Properties["userpw"] != null)
{
passwort = Current.Properties["userpw"].ToString();
}
}
if (!string.IsNullOrWhiteSpace(user) && !string.IsNullOrWhiteSpace(passwort))
{
bool?exists = AllVM.Datenbank.User.Exists(user);
if (exists == true)
{
string pw = AllVM.Datenbank.User.GetPasswort(user);
if (user != null && (passwort == pw))
{
AllVM.Initial(user);
MainPage = new AppShell();
}
else
{
DependencyService.Get <IMessage>().ShortAlert("Passwort stimmt nicht");
MainPage = new NavigationPage(new Login());
}
}
else if (exists == false)
{
DependencyService.Get <IMessage>().ShortAlert("Nutzer existiert nicht");
MainPage = new NavigationPage(new Login());
}
else
{
DependencyService.Get <IMessage>().ShortAlert("Fehler beim Prüfen");
MainPage = new NavigationPage(new Login());
}
}
else
{
MainPage = new NavigationPage(new Login());
}
}
}
catch (Exception ex)
{
_ = ex.Message;
MainPage = new NavigationPage(new Login());
}
}