77 lines
2.5 KiB
C#
77 lines
2.5 KiB
C#
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/**************************************************************************
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*
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* =================================
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* CLR版本 ：4.0.30319.42000
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* 命名空间 ：ToDoStylet
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* 文件名称 ：StudentViewManager.cs
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* =================================
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* 创 建 者 ：LQZ
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* 创建日期 ：2019-8-14 14:54:05
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* 功能描述 ：
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* =================================
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* 修 改 者 ：
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* 修改日期 ：
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* 修改内容 ：
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* =================================
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*
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***************************************************************************/
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using Stylet;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows;
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namespace ToDoStylet
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{
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/// <summary>
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/// 自定义特性，用于跨项目绑定前后台
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/// </summary>
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[AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
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sealed class ViewModelAttribute : Attribute
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{
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readonly Type viewModel;
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public ViewModelAttribute(Type viewModel)
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{
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this.viewModel = viewModel;
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}
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public Type ViewModel
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{
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get { return viewModel; }
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}
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}
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/// <summary>
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/// 绑定view与viewmodel
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/// </summary>
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public class BaseViewManager : ViewManager
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{
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// 用于存储viewmodel与view类型的字典；Dictionary of ViewModel type -> View type
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private readonly Dictionary<Type, Type> viewModelToViewMapping;
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public BaseViewManager(ViewManagerConfig config)
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: base(config)
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{
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var mappings = from type in this.ViewAssemblies.SelectMany(x => x.GetExportedTypes())
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let attribute = type.GetCustomAttribute<ViewModelAttribute>()
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where attribute != null && typeof(UIElement).IsAssignableFrom(type)
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select new { View = type, ViewModel = attribute.ViewModel };
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this.viewModelToViewMapping = mappings.ToDictionary(x => x.ViewModel, x => x.View);
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}
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//根据viewmodel定位view
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protected override Type LocateViewForModel(Type modelType)
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{
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Type viewType;
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if (!this.viewModelToViewMapping.TryGetValue(modelType, out viewType))
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throw new Exception(String.Format("Could not find View for ViewModel {0}", modelType.Name));
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return viewType;
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}
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}
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}
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