C# 标记 Maui 无法绑定属性

Question

我不知道如何为 Shell 对象创建自定义 ItemTemplate

AppShell.xaml.cs

using AppStockAndOrdersMAUI.Views.Orders;
using CommunityToolkit.Maui.Markup;

namespace AppStockAndOrdersMAUI;

public partial class AppShell : Shell
{
    public AppShell()
    {        
        Items.Add(new ShellContent()
        {
            Title = "Home",
            ContentTemplate = new DataTemplate(() => new MainPage()),
            Route = nameof(MainPage)
        });
        
        Items.Add(new ShellContent()
        {
            Title = "Orders",
            ContentTemplate = new DataTemplate(() => new OrdersListPage()),
            Route = nameof(OrdersListPage)
        });

        ItemTemplate = new DataTemplate(() => new Label().Bind(Label.TextProperty, "Title"));
        
        Routing.RegisterRoute(nameof(OrdersListPage), typeof(OrdersListPage));
    }
}

AppShell.xaml

<?xml version="1.0" encoding="UTF-8" ?>
<Shell
    x:Class="AppStockAndOrdersMAUI.AppShell"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:local="clr-namespace:AppStockAndOrdersMAUI"
    Title="AppStockAndOrdersMAUI">
        
    
</Shell>

我也尝试过

ItemTemplate = new DataTemplate(() => new Label().Bind(Label.TextProperty, nameof(ShellContent.Title)));

菜单中不再显示项目

Answer 1

问题解决了，添加了

Grid

，现在一切都按预期显示了

using AppStockAndOrdersMAUI.Views.Orders;
using CommunityToolkit.Maui.Markup;

namespace AppStockAndOrdersMAUI;

public partial class AppShell : Shell
{
    public AppShell()
    {        
        Items.Add(new ShellContent()
        {
            Title = "Home",
            ContentTemplate = new DataTemplate(() => new MainPage()),
            Route = nameof(MainPage)
        });
        
        Items.Add(new ShellContent()
        {
            Title = "Orders",
            ContentTemplate = new DataTemplate(() => new OrdersListPage()),
            Route = nameof(OrdersListPage)
        });

        ItemTemplate = new DataTemplate(() => 
        
            new Grid
            {
                Padding = 10,
                Children =
                {
                    new Label().Bind(Label.TextProperty, "Title").FontSize(20)
                        .TextColor(Color.FromHex("#00A1B1"))
                        .CenterVertical()
                        .Start()
                }
            });
        
        
        Routing.RegisterRoute(nameof(OrdersListPage), typeof(OrdersListPage));
    }