Xamarin - compensation ListView sélection

Je suis en train de travailler avec ce morceau de code

using System;
using Xamarin.Forms;
using System.Diagnostics;
namespace CryptoUI
{
public class HomePage : Xamarin.Forms.MasterDetailPage
{
public HomePage()
{
//Set up the Master, i.e. the Menu
Label header = new Label
{
Text = "MENU",
Font = Font.SystemFontOfSize(20, FontAttributes.Bold),
HorizontalOptions = LayoutOptions.Center
};
//create an array of the Page names
string[] myPageNames = {
"Main",
"Page 2",
"Page 3",
};
//Create ListView for the Master page.
ListView listView = new ListView
{
ItemsSource = myPageNames,
};
//The Master page is actually the Menu page for us
this.Master = new ContentPage
{
Title = "Test",
Content = new StackLayout
{
Children = 
{
header, 
listView
},
}
};
//Define a selected handler for the ListView contained in the Master (ie Menu) Page.
listView.ItemSelected += (sender, args) =>
{
//Set the BindingContext of the detail page.
this.Detail.BindingContext = args.SelectedItem;
string currentPage = this.GetType().Name.ToString();
//This is where you would put your “go to one of the selected pages”
if(listView.SelectedItem.Equals("Main") && !currentPage.Equals("HomePage")){
AsyncPush(new HomePage());
}
else if(listView.SelectedItem.Equals("Page 2") && !currentPage.Equals("SecondPage")){
AsyncPush(new SecondPage());
}
else if(listView.SelectedItem.Equals("Page 3") && !currentPage.Equals("ThirdPage")){
AsyncPush(new ThirdPage());
}               
//Show the detail page.
this.IsPresented = false;
};
listView.ItemSelected += (senders, e) => {
if (e.SelectedItem == null) return; //don't do anything if we just de-selected the row
//do something with e.SelectedItem
((ListView)senders).SelectedItem = null; //de-select the row
};
//Set up the Detail, i.e the Home or Main page.
Label myHomeHeader = new Label
{
Text = "Home Page",
HorizontalOptions = LayoutOptions.Center
};
string[] homePageItems = { "Alpha", "Beta", "Gamma" };
ListView myHomeView = new ListView {
ItemsSource = homePageItems,
};
var myHomePage = new ContentPage();
myHomePage.Content = new StackLayout
{
Children = 
{
myHomeHeader, 
myHomeView
} ,
};
this.Detail = myHomePage;
}
public async void AsyncPush(Page page)
{
await Navigation.PushAsync(page);
}
}
}

Ce code montre, en réalité, un simple menu Déroulant, à l'aide de la Xamarin Forms technologies.
Je suis en train d'essayer de comprendre comment je pouvais facilement effacer la liste de sélection, après j'ai sélectionné la page que je veux à la tête de!

J'ai trouvé ce bout de code sur Xamarin du site web pour les devs (http://developer.xamarin.com/guides/cross-platform/xamarin-forms/working-with/listview/);

listView.ItemSelected += (sender, e) => {
if (e.SelectedItem == null) return; //don't do anything if we just de-selected the row
//do something with e.SelectedItem
((ListView)sender).SelectedItem = null; //de-select the row
};

Mais je ne peux pas actuellement de comprendre comment je doit l'intégrer à mon code ci-dessus 🙂

OriginalL'auteur Guido Magrin | 2014-12-05