blocks|key|3996960|text|MVVM模式是使用许多"Event+to+Command“实现中的一个。您基本上将"Event+to+Command“对象绑定到Click事件，然后VM中的命令被绑定到"Event+to+Command”对象，它将在幕后为您映射，并处理所有启用/禁用的内容。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3996961|您可以在这里看到其中一个实现的示例：WPF+Binding+UI+events+to+commands+in+ViewModel|offset|length|3996962|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/4897775/wpf-binding-ui-events-to-commands-in-viewmodel^0|0|I|1A|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

MVVM pattern is to use one of the many "Event to Command" implementations out there. You basically bind the "Event to Command" object to the Click event and then a command in your VM gets bound to the "Event to Command" object and it gets mapped behind the scenes for you and handles all the enabled / disabled stuff.

You can see an example of one of the implementations here: 
<a href="https://stackoverflow.com/questions/4897775/wpf-binding-ui-events-to-commands-in-viewmodel">WPF Binding UI events to commands in ViewModel</a>

blocks|key|3999994|text|你应该绑定到一个集合，该集合的对象有一个集合作为公共属性，并通过类型将其模板化到你想在每个treeviewitem中看到的任何东西。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3999995|如下面的示例：https://docs.microsoft.com/en-us/dotnet/api/system.windows.hierarchicaldatatemplate?view=netframework-4.7.2|offset|length|3999996|从技术上讲，你可以有一个按钮，它的模板是文本块或其他东西，然后它将具有按钮的行为，如单击和命令。但我更有可能使用inputbinding。|3999997|下面是一个例子：|3999998|+<DataTemplate+DataType="{x:Type+local:LineTerrainVM}">
++++<Grid+Background="Transparent">
++++++++<Grid.InputBindings>
++++++++++++<MouseBinding+MouseAction="RightClick"+Command="{Binding+FixLineCommand}"/>
++++++++</Grid.InputBindings>|code-block|syntax|javascript|3999999|你可以给它一个绑定“{commandparameter=+.}”，它会把视图模型作为一个参数来传递。你也可以使用树形视图的datacontext的relativesource来获取父视图模型，并在其中定义一个命令来做你的事情。|4000000|由于您要做事情是视图责任，因此您可以在不“破坏”mvvm的情况下依赖于路由的事件。在任何treeviewitem中的点击都可以在树视图级别进行处理，并使用originalsource获得被点击的treeviewitem。然后获取视图模型的数据上下文。粗略的想法：|4000001|++++<TreeView+Name="tv"+ItemsSource="{Binding+Families}"+++++++++++++++++++FrameworkElement.PreviewMouseLeftButtonDown="Tv_PreviewMouseLeftButtonDown"|4000002|和操控者：|4000003|++++private+void+Tv_PreviewMouseLeftButtonDown(object+sender,+MouseButtonEventArgs+e)
++++{
++++++++var+vm+=+((FrameworkElement)e.OriginalSource).DataContext;
++++++++//+do+something+with+viewmodel
++++}|4000004|然后，您可以在对话框窗口中执行一些类似新建的操作，将其datacontext设置为您刚刚获得的视图模型，并对其进行显示。|4000005|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-us/dotnet/api/system.windows.hierarchicaldatatemplate?view=netframework-4.7.2^0|0|7|2Z|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|18|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|19|8|@]|9|@$D|1A|E|1B|1|1C]]|A|$]]|$1|F|3|G|5|6|7|1D|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1E|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|1F|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|1G|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1H|8|@]|9|@]|A|$]]|$1|S|3|T|5|L|7|1I|8|@]|9|@]|A|$M|N]]|$1|U|3|V|5|6|7|1J|8|@]|9|@]|A|$]]|$1|W|3|X|5|L|7|1K|8|@]|9|@]|A|$M|N]]|$1|Y|3|Z|5|6|7|1L|8|@]|9|@]|A|$]]|$1|10|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]]|11|$12|$5|13|14|15|A|$16|17]]]]

You should be binding to a collection whose objects have a collection as a public property and templating by type into whatever you want to see in each treeviewitem.

Like this sample:
<a href="https://docs.microsoft.com/en-us/dotnet/api/system.windows.hierarchicaldatatemplate?view=netframework-4.7.2" rel="nofollow noreferrer">https://docs.microsoft.com/en-us/dotnet/api/system.windows.hierarchicaldatatemplate?view=netframework-4.7.2</a>

Technically, you could have a button whose template was a textblock or something and that would then have the behaviour of a button such as click and command.
But I'd be more likely to use an inputbinding.

Here's an example:

<pre><code> &lt;DataTemplate DataType="{x:Type local:LineTerrainVM}"&gt;
 &lt;Grid Background="Transparent"&gt;
 &lt;Grid.InputBindings&gt;
 &lt;MouseBinding MouseAction="RightClick" Command="{Binding FixLineCommand}"/&gt;
 &lt;/Grid.InputBindings&gt;
</code></pre>

You can give that a commandparameter="{Binding .}" and it'll pass the viewmodel as a parameter.
You could also use relativesource to the datacontext of the treeview to get at a parent viewmodel and define a command in that to do your stuff.

Since that stuff you want to do is a view responsibility you could rely on routed events without "breaking" mvvm. A click in any treeviewitem could be handled at the treeview level and use the originalsource to get to the treeviewitem clicked. Then grab it's datacontext for the viewmodel of whatever that is.
Rough idea:

<pre><code> &lt;TreeView Name="tv" ItemsSource="{Binding Families}" FrameworkElement.PreviewMouseLeftButtonDown="Tv_PreviewMouseLeftButtonDown"
</code></pre>

And the handler:

<pre><code> private void Tv_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
 {
 var vm = ((FrameworkElement)e.OriginalSource).DataContext;
 // do something with viewmodel
 }
</code></pre>

You could then do something like new up your dialog window, set it's datacontext to that viewmodel you just got and showdialog it.

I need to click on an TreeViewItem and open an dialog window with the data of that TreeViewItem, later based on that data i will run another command.
My actual problem is: I cant click on it because treeviewitem doesnt have the command property.

My scenario: I have 2 Models with 2 properties that will be used to create my TreeViewItems. On my ViewModel i create them, and organize them inside each other based on their properties and then store them inside One Collection.

Here's my xaml to bind the elements:

<pre><code>&lt;TreeView ItemsSource="{Binding Local}"&gt;
 &lt;TreeView.DataContext&gt;
 &lt;data:ItemViewModel/&gt;
 &lt;/TreeView.DataContext&gt;
&lt;/Treeview&gt;
//In my "Local" property i have 3 TreeViewItems with other items inside them wich i want to execute the commands
</code></pre>

I couldn't find a way to create a datatemplate for that specific scenario. Even tried to create a datatemplate with a Hyperlink (thought it would be a temporary solution) inside it, but would not execute any command.

TreeViewItem Command binding

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我需要单击一个TreeViewItem并打开一个包含该TreeViewItem数据的对话框窗口，稍后我将根据该数据运行另一个命令。我的实际问题是:我不能点击它，因为treeviewitem没有command属性。我的场景:我有两个模型和两个属性，将用于创建我的TreeViewItems。在我的ViewModel上，我创...

问TreeViewItem命令绑定
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