我觉得我只是没有直接问谷歌霸主这个问题，所以我想看看是否有人能帮助解释如何做到这一点。我有一个新的.Net毛伊岛应用程序，使用4个不同的视图/页面。我创建的主页（根）让我从我们的数据库搜索用户，然后转换到一个新的页面;我称之为ResultsPage。在那里，您可以选择一个用户并被带到DetailPage，在那里可以执行编辑。一旦您进行了编辑并保存，它会将您发送到我的最后一个页面（SuccessPage），其中包含有关更改的消息。
这一切都很有魅力。我可以使用ViewModels和QueryProperties将数据传递到页面，并将更改保存到数据库。失败的地方是在SuccessPage上。在您收到有关更新的消息后，我希望有一个按钮，用户可以直接返回到MainPage，执行新的搜索并重复以上所有步骤。
对于所有其他页面转换，我可以利用Shell.Current.GoToAsync()来访问新页面和/或传递数据，如下所示：

await Shell.Current.GoToAsync(nameof(ResultsPage));

或

await Shell.Current.GoToAsync($"{nameof(DetailsPage)}?Parameter={param}");

在Success页面中，我尝试输入await Shell.Current.GoToAsync(nameof(MainPage));，但是这抛出了一个异常，关于“当前不支持shell元素的相对路由”，并建议我尝试在我的uri前面加上前缀///。它实际上并不恢复MainPage UI元素。那么我如何才能让shell返回MainPage呢？
此外，我也尝试过await Shell.Current.Navigation.PopToRootAsync();，但是遇到了与在uri前面加上斜杠时相同的问题;它更改标题但不更改任何UI元素

编辑

下面是按钮的代码（注：我在我的尝试旁边留下了注解，表明它们没有帮助

private async void ReturnSearchButton_Clicked(object sender, EventArgs e)
    {
        //await Shell.Current.GoToAsync("../"); //exception, ambiguous routes matched

        //List<Page> previousPages = Navigation.NavigationStack.ToList();
        //foreach (Page page in previousPages)
        //{
        //  Navigation.RemovePage(page); //exception, null value
        //}

        await Shell.Current.Navigation.PopToRootAsync();
    }

以下是单击按钮前后的一些UI屏幕截图：

• 单击按钮之前 * x1c 0d1x
• 单击按钮后 *
  

主页添加编辑

• 主页面XAML*

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="UserNameReset.Views.MainPage"
             Title="Home">
    <VerticalStackLayout Padding="10"
                         Margin="5">

        <Label 
            Text="Reset Users"
            SemanticProperties.HeadingLevel="Level1"
            FontSize="32"
            HorizontalOptions="Center" />

        <Label
            Text="Enter the users email address or their ID with Pin" 
            SemanticProperties.HeadingLevel="Level3"
            HorizontalOptions="Center"
            FontSize="18"/>

        <Label
            x:Name="fullWarningLabel"
            SemanticProperties.HeadingLevel="Level3"
            HorizontalOptions="Center"
            FontSize="18"
            TextColor="Red"
            Text="You must provide either the users email OR their ID and pin"
            IsVisible="false"/>

        <Entry 
            x:Name="emailEntry"
            Placeholder="example@demo.org"
            ClearButtonVisibility="WhileEditing"
            Completed="Entry_Completed"
            Keyboard="Email"
            IsSpellCheckEnabled="False"/>

        <Label
            Text="OR"
            SemanticProperties.HeadingLevel="Level3"
            HorizontalOptions="Center"
            FontSize="18"/>

        <Grid ColumnDefinitions="*,*" ColumnSpacing="4" RowDefinitions="*,*" RowSpacing="2">
            <Entry
                x:Name="idEntry"
                Placeholder="ID"
                ClearButtonVisibility="WhileEditing"
                Grid.Column="0"
                Completed="Entry_Completed"
                IsSpellCheckEnabled="False"/>
            <Label
                x:Name="idWarning"
                IsVisible="false"
                Text="Please enter the users ID"
                Grid.Column="0"
                Grid.Row="2"
                TextColor="Red"/>

            <Entry
                x:Name="pinEntry"
                Placeholder="PIN"
                ClearButtonVisibility="WhileEditing"
                Grid.Column="2"
                Completed="Entry_Completed"
                IsSpellCheckEnabled="False"/>
            <Label
                x:Name="pinWarning"
                IsVisible="false"
                Text="Please enter the users PIN"
                Grid.Column="2"
                Grid.Row="2"
                TextColor="Red"/>
        </Grid>

        <Button
            x:Name="SubmitButton"
            Text="Search"
            SemanticProperties.Hint="Click to search for the user by values you provided"
            Clicked="Entry_Completed"
            HorizontalOptions="Center"/>
    </VerticalStackLayout>
</ContentPage>

• MainPage代码在后面 *

using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using UserNameReset.Models;

namespace UserNameReset.Views;

public partial class MainPage : ContentPage
{
    readonly ILogger<MainPage> _logger;

    public MainPage(ILogger<MainPage> logger)
    {
        InitializeComponent();
        _logger = logger;
    }

    /// <summary>
    /// Triggered when the user clicks the "Search" button, 
    /// when they finish entering an email,
    /// or when they successfully enter both Id and Pin
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    public void Entry_Completed(object sender, EventArgs e)
    {
        _logger.LogInformation("Entry fields filled, checking values...");

        // Cleans up layout each time search is triggered
        pinWarning.IsVisible = false;
        idWarning.IsVisible = false;
        fullWarningLabel.IsVisible = false;

        bool validUser = false;
        bool usingPinAndId = false;
        Queried_User user = new();

        // Check that both the plant ID and PIN were provided
        if (!string.IsNullOrWhiteSpace(idEntry.Text) && !string.IsNullOrWhiteSpace(pinEntry.Text))
        {
            _logger.LogInformation("Pin and ID provided!");
            validUser = true;
            usingPinAndId = true;
            user.Pin = pinEntry.Text;
            user.Id = idEntry.Text;
        }
        // Check if the email was provided (only if the plant ID and PIN weren't)
        else if (!string.IsNullOrWhiteSpace(emailEntry.Text))
        {
            _logger.LogInformation("Email provided!");
            validUser = true;
            user.Email = emailEntry.Text;
        }
        // If nothing was provided, add a warning to the appropriate entry fields
        else
        {
            if (!string.IsNullOrWhiteSpace(plantIdEntry.Text))
                pinWarning.IsVisible = true;
            else if (!string.IsNullOrWhiteSpace(pinEntry.Text))
                idWarning.IsVisible = true;
            else
                fullWarningLabel.IsVisible = true;
        }

        // Did we get a valid user obj? Navigate to the results page if so
        if (validUser)
        {
            // create a message of how the search is proceeding, changing text depending on search method
            string msg = "Searching via " + (usingPinAndId ? "plant ID: (" + user.Id + ") and pin: (" + user.Pin + ")" : "email: (" + user.Email + ")");

            _logger.LogInformation("User info validated. Going to get results from DB. " + msg);
            GoToResults(msg, user);
        }

        // Useful for displaying alerts or messages to the end user!!
        //await Shell.Current.DisplayAlert("Error!", $"Undable to return records: {ex.Message}", "OK");
    }

    /// <summary>
    /// Takes a simple user object and then redirects the user to the results page, 
    /// passing the user object as a query property
    /// </summary>
    /// <param name="user"></param>
    private async void GoToResults(string srchMthd, Queried_User user)
    {
        _logger.LogInformation($"User properties - email:{user.Email} - pin:{user.Pin} - ID:{user.Id}");

        await Shell.Current.GoToAsync($"{nameof(ResultsPage)}?SearchMethod={srchMthd}",
            new Dictionary<string, object>
            {
                ["User"] = user
            });
    }
}

GitHub更新

我创建了一个repo，其中托管了应用程序的简化版本，该版本重复了此问题：GitHub

编辑日期：2022年10月6日

由于其他人的建议，我已经为此问题在Maui GitHub上打开了一个新的问题。要查看该问题并跟踪其进度，请转到here