我想达到的目标:

我有一个Xamarin表单应用程序，它通过API调用检索数据，该数据被设置为GamesResultModel并绑定到. app中的公共属性，然后数据显示在listview中。现在，当使用多个页面时，我已经得到了它的工作，每个页面绑定到他们需要的数据，但是我只想使用一个页面实例化多次，并且实例化时设置绑定源和页面标题。

问题:

我不知道如何设置一个页面的绑定源时，页面从根页实例化?我试了下面的方法，但没有成功

public static GamesPageModel Future { get; set; }
FuturePage.SetBinding(ListView.ItemsSourceProperty, "Future");

代码例子:

public class RootPage : TabbedPage
{
    public static GamesPageModel History { get; set; }
    public static GamesPageModel Current { get; set; }
    public static GamesPageModel Future { get; set; }
 public RootPage()
    {
        ShowLoginDialog();
        buildTabs();
    }

从根页我实例化一个新的GamesPage实例为每个时间跨度:

    private void buildTabs()
    {
        var historyPage = new GamesPage();
        historyPage.Title = "History";
        historyPage.SetBinding(ListView.ItemsSourceProperty, "History");
        var todayPage = new GamesPage();
        todayPage.Title = "Current";
        todayPage.SetBinding(ListView.ItemsSourceProperty, "Today");
        var FuturePage = new GamesPage();
        FuturePage.Title = "Future";
        FuturePage.SetBinding(ListView.ItemsSourceProperty, "Future");
        this.Children.Add(todayPage);
        this.Children.Add(historyPage);
        this.Children.Add(futurePage);
}

设置API调用的游戏结果模型:

[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
[System.Xml.Serialization.XmlRootAttribute(Namespace = "", IsNullable = false)]
public partial class GamesResult
  {
[System.Xml.Serialization.XmlArrayItemAttribute("item", IsNullable = false)]
public xmlItem[] previous { get; set; }
[System.Xml.Serialization.XmlArrayItemAttribute("item", IsNullable = false)]
public xmlItem[] current { get; set; }
[System.Xml.Serialization.XmlArrayItemAttribute("item", IsNullable = false)]
public xmlItem[] future { get; set; }
 }
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
public partial class xmlItem
 {
public ushort field_id { get; set; }
public string field_desc { get; set; }
public ushort fk_round_id { get; set; }
public string field_start_time { get; set; }
public byte tee_interval { get; set; }
public byte fk_course_id { get; set; }
public uint field_pin { get; set; }
public ushort fourball_id { get; set; }
public ushort fk_field_id { get; set; }
public ushort fk_course_hole_id_tee_off { get; set; }
public string tee_off_time { get; set; }
public ushort fourball_team_id { get; set; }
public byte team_desc { get; set; }
public ushort fk_fourball_id { get; set; }
public ushort fourball_player_id { get; set; }
public ushort fk_player_mem_id { get; set; }
public byte player_hc { get; set; }
public ushort fk_player_team { get; set; }
public byte fk_player_tee { get; set; }
public ushort round_id { get; set; }
public string round_desc { get; set; }
public ushort fk_tour_id { get; set; }
public string round_date { get; set; }
public ushort tour_id { get; set; }
public string tour_desc { get; set; }
public xmlItemTour_start tour_start { get; set; }
public xmlItemTour_end tour_end { get; set; }
public ushort fk_member_id { get; set; }
public xmlItemCreate_date create_date { get; set; }
public byte fk_comp_typ_id { get; set; }
public byte tour_status { get; set; }
}

游戏页面:

public class GamesPage : ContentPage
{
    #region Private Properties
    private GamesPageModel viewModel
    {
        get { return BindingContext as GamesPageModel; }
    }
    private ListView listView;
    #endregion
    this.Content = new StackLayout()
        {       
            Children ={
                 listView
            }
        };
    }
    public GamesPage()
    {
        this.SetBinding(TitleProperty, "Title");
        listView = new ListView();
        var viewTemplate = new DataTemplate(typeof(GameViewCell));  
        listView.ItemTemplate = viewTemplate;
        listView.SetBinding(ListView.ItemsSourceProperty, "Games");

游戏页面模型:

public class GamesPageModel
{
    public GamesPageModel()
    {
        Games = new List<xmlItem>();
    }
    public string Title { get; set; }
    public List<xmlItem> Games { get; set; }
}

Game View Cell:

public class GameViewCell : ViewCell
{
    public GameViewCell()
    {
        Label tour_Desc = new Label()
            {
                Font = Font.BoldSystemFontOfSize(15)
            };
          Label round_Desc = new Label();
          Label field_Desc = new Label();
        tour_Desc.SetBinding(Label.TextProperty, "tour_desc");
        round_Desc.SetBinding(Label.TextProperty, "round_desc");
        field_Desc.SetBinding(Label.TextProperty, "field_desc");
        var layout = new StackLayout();
        layout.Children.Add(tour_Desc);
        layout.Children.Add(round_Desc);
        layout.Children.Add(field_Desc);
        this.View = layout;
    }
}

单例，用于设置API调用返回时的数据，以便在应用程序的任何地方使用:

public class App
{
    private static readonly App instance = new App();
    private LoginResult loginResult;
    private GamesResult gamesResult;
    public static App Instance
    {
        get
        {
            return instance;
        }
    }
    public LoginResult LoginResult
    {
        get
        {
            return loginResult;
        }
        set
        {
            loginResult = value;
        }
    }
    public GamesResult GamesResult
    {
        get
        {
            return gamesResult;
        }
        set
        {
            gamesResult = value;
        }
    }
}

使用多个页面的简单实现，如下面的示例所示:

        var todayPage = new CurrentGamesPage();
        var historyPage = new HistoryGamesPage();
        var futurePage = new FutureGamesPage();
        this.Children.Add(todayPage);
        this.Children.Add(historyPage);
        this.Children.Add(futurePage);

public class HistoryGamesPage : ContentPage
{
    private ListView listView;
    public HistoryGamesPage()
    {
        Title = "Current Games";
        listView = new ListView();
        BindData();
        this.Content = new StackLayout()
       {
          Children = {
              listView
          }
       };
    }
    public void BindData()
    {
        if (App.Instance.GamesResult != null)
        {
            try
            {
                var viewTemplate = new DataTemplate(typeof(GameViewCell));
                listView.ItemTemplate = viewTemplate;
                listView.ItemsSource = App.Instance.GamesResult.previous;
            }
            catch(Exception ex)
            {
                Debug.WriteLine(ex.Message);
            }
        }
    }
}

FuturePage.BindingContext = RootPage.Future;

FuturePage.SetBinding(ListView.ItemsSourceProperty, "Future");