MVVM_UI和逻辑分离（事件利用命令替换），并实现模板切换等...

 1 <window x:class="demo_mvvm.mainwindow"
 2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 4         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
 5         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
 6         xmlns:local="clr-namespace:demo_mvvm"
 7         xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
 8         mc:ignorable="d"
 9         title="mainwindow"
10         height="450" 
11         width="800"
12         datacontext="{dynamicresource vm}"
13         >
14     <window.resources>
15         <local:reversebool x:key="reversebool" />
16 
17         <datatemplate x:key="template1">
18             <textblock text="{binding istemplate1,stringformat=我是模板1：{0}}"/>
19         </datatemplate>
20 
21         <datatemplate x:key="template2">
22             <textblock text="{binding istemplate1,stringformat=我是模板2：{0}}"/>
23         </datatemplate>
24         
25         <local:mainwindowviewmodel x:key="vm"/>
26     </window.resources>
27     <grid>
28         <stackpanel>
29             <textblock text="采用mvvm，ui和逻辑分离" />
30             <stackpanel orientation="horizontal">
31                 <radiobutton content="模板1" ischecked="{binding istemplate1}" groupname="mb" />
32                 <radiobutton content="模板2" ischecked="{binding istemplate1,converter={staticresource reversebool}}" groupname="mb" />
33             </stackpanel>
34             <contentcontrol content="{binding}">
35                 <contentcontrol.style>
36                     <style targettype="contentcontrol">
37                         <setter property="contenttemplate" value="{staticresource template1}" />
38                         <style.triggers>
39                             <datatrigger binding="{binding istemplate1}" value="false">
40                                 <setter property="contenttemplate" value="{staticresource template2}" />
41                             </datatrigger>
42                         </style.triggers>
43                     </style>
44                 </contentcontrol.style>
45             </contentcontrol>
46         </stackpanel>
47         <i:interaction.triggers>
48             <i:eventtrigger eventname="loaded">
49                 <i:invokecommandaction command="{binding initcommand}"  />
50             </i:eventtrigger>
51         </i:interaction.triggers>
52     </grid>
53 </window>

 1 using system;
 2 using system.collections.generic;
 3 using system.linq;
 4 using system.text;
 5 using system.threading.tasks;
 6 using system.windows;
 7 using system.windows.controls;
 8 using system.windows.data;
 9 using system.windows.documents;
10 using system.windows.input;
11 using system.windows.media;
12 using system.windows.media.imaging;
13 using system.windows.navigation;
14 using system.windows.shapes;
15 
16 namespace demo_mvvm
17 {
18     /// <summary>
19     /// mainwindow.xaml 的交互逻辑
20     /// </summary>
21     public partial class mainwindow : window
22     {
23         public mainwindow()
24         {
25             initializecomponent();
26         }
27     }
28 }

 1 using microsoft.practices.prism.commands;
 2 using system;
 3 using system.collections.generic;
 4 using system.componentmodel;
 5 using system.linq;
 6 using system.text;
 7 using system.threading.tasks;
 8 using system.windows;
 9 using system.windows.input;
10 
11 namespace demo_mvvm
12 {
13     class mainwindowviewmodel : inotifypropertychanged
14     {
15         private bool istemplate1 = true;
16 
17         public event propertychangedeventhandler propertychanged;
18 
19         public icommand initcommand { get; private set; }
20 
21         public bool istemplate1
22         {
23             get => istemplate1;
24             set
25             {
26                 istemplate1 = value;
27                 propertychanged?.invoke(this, new propertychangedeventargs(nameof(istemplate1)));
28             }
29         }
30 
31 
32         public mainwindowviewmodel()
33         {
34             initcommand = new delegatecommand(init);
35         }
36 
37         void init()
38         {
39             messagebox.show("初始化完成！");
40         }
41     }
42 }