Caliburn.Micro框架之Action Convertions

Posted 2021-02-28 colorchild

首先新建一个项目，名称叫Caliburn.Micro.ActionConvertions

然后删掉MainWindow.xaml

然后去app.xaml删掉StartupUri这行代码

其次，安装Caliburn.Micro，Caliburn.Micro.Core，这两个Nuget包，如下图

然后新建一个类Bootstrapper，这个类是引导作用，比如重写了首页的引导，ioc注入等

然后在项目中新建ViewModels，Views，在Views中添加窗口ShellView，在ViewModels中添加类ShellViewModel，如下图

public class Bootstrapper : BootstrapperBase
    {
        private SimpleContainer container;

        public Bootstrapper()
        {
            Initialize();
        }

        protected override void Configure()
        {
            container = new SimpleContainer();

            container.Singleton<IWindowManager, WindowManager>();

            container.PerRequest<ShellViewModel>();
        }

        protected override void OnStartup(object sender, StartupEventArgs e)
        {
            DisplayRootViewFor<ShellViewModel>();
        }

        protected override object GetInstance(Type service, string key)
        {
            return container.GetInstance(service, key);
        }

        protected override IEnumerable<object> GetAllInstances(Type service)
        {
            return container.GetAllInstances(service);
        }

        protected override void BuildUp(object instance)
        {
            container.BuildUp(instance);
        }
    }

 

再继续新建一个类TaskHelper

TaskHelper类的内容入下

修改ShellViewModel类

public class ShellViewModel : Screen
    {
        private string output;

        public void Clear() => Output = String.Empty;

        public void SimpleSayHello() => Output = "Hello from Caliburn.Micro";

        public void SayHello(string name) => Output = $"Hello {name}";

        public bool CanSayHello(string name) => !String.IsNullOrEmpty(name);

        public Task SayGoodbyeAsync(string name)
        {
            Output = $"Goodbye {name}";

            return TaskHelper.FromResult(true);
        }

        public bool CanSayGoodbye(string name) => !String.IsNullOrEmpty(name);

        public string Output
        {
            get { return output; }
            set { Set(ref output, value); }
        }
    }

然后修改ShellView页面的布局

<Window x:Class="Caliburn.Micro.ActionConvertions.Views.ShellView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Caliburn.Micro.ActionConvertions.Views"
        mc:Ignorable="d"
        xmlns:cm="http://www.caliburnproject.org"
        xmlns:i="http://schemas.microsoft.com/xaml/behaviors"
        Title="ShellView" Height="450" Width="800">
    <Window.Resources>
        <Style x:Key="ActionButtonStyle"
               TargetType="Button">
            <Setter Property="Margin"
                    Value="0,10,0,0" />
            <Setter Property="HorizontalAlignment"
                    Value="Stretch" />
        </Style>
    </Window.Resources>
    <Grid>
        <ScrollViewer>
            <StackPanel Margin="24,12">
                <TextBlock>
                        <Run Text="Output:"
                             FontWeight="Bold" />
                        <Run Text="{Binding Output}" />
                </TextBlock>

                <TextBlock Text="Name" />
                <TextBox x:Name="Name"
                         Margin="0,10,0,0"
                         HorizontalAlignment="Stretch" />

                <Button x:Name="Clear"
                        Content="Clear"
                        Style="{StaticResource ActionButtonStyle}" />
                <Button x:Name="SimpleSayHello"
                        Content="Simple Say Hello"
                        Style="{StaticResource ActionButtonStyle}" />
                <Button cm:Message.Attach="SimpleSayHello"
                        Content="Simple Say Hello (using Message.Attach)"
                        Style="{StaticResource ActionButtonStyle}" />
                <Button cm:Message.Attach="[Event MouseDoubleClick] = [SimpleSayHello]"
                        Content="Simple Say Hello (Custom Event - Double Tapped)"
                        Style="{StaticResource ActionButtonStyle}" />
                <Button x:Name="FullSyntax"
                        Content="Simple Say Hello (Full Behaviour Syntax)"
                        Style="{StaticResource ActionButtonStyle}">
                    <i:Interaction.Triggers>
                        <i:EventTrigger EventName="Click">
                            <cm:ActionMessage MethodName="SimpleSayHello" />
                        </i:EventTrigger>
                    </i:Interaction.Triggers>
                </Button>
                <Button x:Name="SayHello"
                        Content="Say Hello (with parameter)"
                        Style="{StaticResource ActionButtonStyle}" />
                <Button cm:Message.Attach="SayHello(Name)"
                        Content="Say Hello (with parameter and Message.Attach)"
                        Style="{StaticResource ActionButtonStyle}" />
                <Button x:Name="SayGoodbye"
                        Content="Say Goodbye (async method)"
                        Style="{StaticResource ActionButtonStyle}" />
            </StackPanel>
        </ScrollViewer>
    </Grid>
</Window>

修改App.xaml的引导程序代码

    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary>
                    <local:Bootstrapper x:Key="Bootstrapper" />
                </ResourceDictionary>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>

 

然后运行如下图所示

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