之前也写过好多篇CM框架相关的项目实战文章,比如:
C# WPF Caliburn.Micro框架下利用Mef加载其它项目界面
C# WPF mvvm模式下combobox绑定(list<enum>、Dictionary<int,string>)
C# WPF MVVM模式Caliburn.Micro框架下事件发布与订阅
但是可能这些都是把一个综合性的项目分多个部分分别讲述的,有些初学者没有从前往后连续起来阅读的话,后面的部分可能就不容易理解了。其次,因为没有整体的构思,随着内容的增加,项目越来越显得笨重和凌乱,所以今天我重新搞了一个项目,希望以尽量少的代码,涵盖尽量多的知识点,帮助大家更好的理解和使用CM框架。
项目主要包括的类文件如下图:
① MainWindowViewModel.cs类:
using PropertyChanged;
using System.Collections.ObjectModel;
namespace Caliburn.Micro.Hello
{
[AddINotifyPropertyChangedInterface]
public class MainWindowViewModel : PropertyChangedBase, IViewModel
{
private static readonly Common.Logging.ILog logger = Common.Logging.LogManager.GetLogger<MainWindowViewModel>();
public IViewModel ActiveWindowView { get; set; }
public ObservableCollection<string> ListBoxItems { get; set; }
public string SelectedItem { get; set; }
public MainWindowViewModel()
{
logger.Info($"Enter [MainWindowViewModel].");
ListBoxItems = new ObservableCollection<string>() { };
ListBoxItems.Add("ShellView");
ListBoxItems.Add("EventAggregatorView");
ListBoxItems.Add("ConductorView");
logger.Info($"Leave [MainWindowViewModel].");
}
public void ListBoxItems_SelectionChanged()
{
switch(SelectedItem)
{
case "ShellView":
ActiveWindowView = new ShellViewModel();break;
case "EventAggregatorView":
ActiveWindowView = EventAggregatorViewModel.Instance; break;
case "ConductorView":
ActiveWindowView = new ConductorViewModel(); break;
default:break;
}
}
}
}
[AddINotifyPropertyChangedInterface]:需要引用第三方库PropertyChanged.Fody,加上之后类里面的属性变更后会自动通知界面,无需再一个个单独触发;
logger是定义的common logging的一个通用日志,需要在nuget上引用:Common.Logging.Log4Net1213;
ListBoxItems_SelectionChanged()是listbox的选择改变事件:
<ListBox Name="ListBoxItems" Grid.Column="0" SelectedItem="{Binding SelectedItem}" Margin="2"
cal:Message.Attach="[Event SelectionChanged] = [Action ListBoxItems_SelectionChanged]"/>
ActiveWindowView 是我的主窗体,选择那个就激活那个
<ContentControl Name="ActiveWindowView"/>
②ShellViewModel.cs类:
从ioc容器获取一个IWindowManager并显示:
SimpleContainerViewModel simpleContainerViewModel = new SimpleContainerViewModel();
IWindowManager windowManager = IoC.Get<IWindowManager>();
windowManager.ShowDialog(simpleContainerViewModel);
CanSayHello和SayHello,只有CanSayHello条件满足才会执行SayHello
public bool CanSayHello
{
get { return !string.IsNullOrWhiteSpace(Name); }
}
public void SayHello()
{
}
③EventAggregatorViewModel.cs
双检锁线程安全的单例模式:
private static EventAggregatorViewModel instance;
private static object locker = new object();
/// <summary>
/// 双检锁
/// </summary>
public static EventAggregatorViewModel Instance
{
get
{
if (instance == null)
{
lock(locker)
{
if (instance == null)
{
instance = new EventAggregatorViewModel();
}
}
}
return instance;
}
}
事件订阅:需要继承事件接口IHandle<PersonInfoEven>
private readonly IEventAggregator eventAggregator;
this.eventAggregator = IoC.Get<IEventAggregator>();
this.eventAggregator.Subscribe(this);
事件处理方法:
public void Handle(PersonInfoEven message)
{
PersonInfo = message.ToString();
}
④SimpleContainerViewModel.cs
方法1 同步ui发布事件
this.eventAggregator.PublishOnUIThread("i am a chinese");
方法2 开线程去发布
this.eventAggregator.Publish(new PersonInfoEven() {
Name = "ZYR", Age = 18, Sex = "man" },
action =>
{
//方式①
//Task.Factory.StartNew(action);
//方式②
Task.Run(action);
});
等待窗体BusyIndicator ,需要引用第三方库Xceed.Wpf.Toolkit,
并添加名称空间:
xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
<xctk:BusyIndicator Name="busyIndicator" BusyContent="Publish Event ..." IsBusy="{Binding IsShow}" Style="{x:Null}">
⑤ConductorViewModel.cs:此类需要继承Conductor<object>
将需要激活的实例放到ActivateItem,就可以从界面绑定激活对应实例窗体
ActivateItem(new ShellViewModel());
项目有点长,不可能每个细节都说得到位,能看到这里的都是真爱,那么下面给出源码百度网盘链接:
网盘链接: https://pan.baidu.com/s/18LOVAIxy7WCWJisiPcOuAQ