public static async Task <int> ShowAsync(string title, object listSource, int defaultItem = 0)
{
ListPickerDialog dialog = new ListPickerDialog(title, listSource, defaultItem);
await dialog.ShowAsync();
return(dialog.SelectedItem);
}
private async Task <int> ShowRulesListPicker(string title)
{
List <string> li = new List <string>();
for (int i = rulesSources.Count - 1; i >= 0; i--)
{
li.Add(rulesSources[i].Date.ToString("d") +
(i == rulesSources.Count - 1
? " (" + ResourceLoader.GetForCurrentView().GetString("newest") + ")"
: ""));
}
int n = await ListPickerDialog.ShowAsync(title, li, rulesSources.Count - actualRules - 1);
return(n >= 0 && n < rulesSources.Count
? rulesSources.Count - n - 1
: -1);
}