我試圖了解毛伊島的服務，但注入并沒有在視圖中重新調整它。
namespace FoodOrder.ViewModels
{
public class MenusViewModel
{
IMenuServiceInterface _menuServiceInterface;
IFoodOrderHttpClientInterface _foodOrderHttpClientInterface;
public MenusViewModel(IMenuServiceInterface
menuServiceInterface, IFoodOrderHttpClientInterface
foodOrderHttpClientInterface)
{
_foodOrderHttpClientInterface = foodOrderHttpClientInterface;
}
}
}
看法
<?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="FoodOrder.Pages.MenuPage"
xmlns:vm="clr-namespace:FoodOrder.ViewModels"
Title="MenuPage">
<ContentPage.BindingContext>
<vm:MenusViewModel />
</ContentPage.BindingContext>
<StackLayout>
<Label Text="Welcome to .NET MAUI!"
VerticalOptions="Center"
HorizontalOptions="Center" />
</StackLayout>
</ContentPage>
代碼背后
public partial class MenuPage : ContentPage
{
public MenuPage(MenusViewModel viewModel)
{
InitializeComponent();
BindingContext = viewModel;
}
}
MauiProgram.cs
public static class MauiProgram
{
public static MauiApp CreateMauiApp()
{
var builder = MauiApp.CreateBuilder();
builder
.UseMauiApp<App>()
.ConfigureFonts(fonts =>
{
fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
});
builder.Services.AddTransient<IFoodOrderHttpClientInterface,
FoodOrderHttpClientServices>();
return builder.Build();
}
}
uj5u.com熱心網友回復：
要讓 Maui 應用依賴注入，您還需要宣告應該發生注入的視圖模型。
將此行添加到構建器：
builder.Services.AddTransient<MenusViewModel>();
順便說一句，如果有許多視圖和視圖模型要添加到 DI 服務中，可以像這樣更簡潔：
var diTypes = new List<Type> { typeof(MainPage), typeof(Page2), typeof(Page3), typeof(Page4) };
diTypes.ForEach(ty => builder.Services.AddTransient(ty));
轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/487103.html