blocks|key|257905|text|您可以使用CollectionViewSource来应用过滤，另一个示例可以在here和here中找到。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|257906|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-us/dotnet/api/system.windows.data.collectionviewsource?redirectedfrom=MSDN&view=netframework-4.7.2|1|https://web.archive.org/web/20120628170045/http://xamlcoder.com/blog/2010/10/27/filtering-data-using-collectionviewsource/|2|https://web.archive.org/web/20160801000000*/http://www.galasoft.ch/mydotnet/articles/article-2007081301.aspx^0|5|K|0|13|4|1|18|4|2|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]|$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]|N|$5|G|H|I|C|$J|O]]]]

You can use the <a href="https://docs.microsoft.com/en-us/dotnet/api/system.windows.data.collectionviewsource?redirectedfrom=MSDN&amp;view=netframework-4.7.2" rel="nofollow noreferrer">CollectionViewSource</a> to apply filtering, another example can be found <a href="https://web.archive.org/web/20120628170045/http://xamlcoder.com/blog/2010/10/27/filtering-data-using-collectionviewsource/" rel="nofollow noreferrer">here</a> and <a href="https://web.archive.org/web/20160801000000*/http://www.galasoft.ch/mydotnet/articles/article-2007081301.aspx" rel="nofollow noreferrer">here</a>.

blocks|key|3666448|text|您可以使用CollectionViewSource来完成此操作。您不希望完全在XAML中执行此操作，因为如果过滤代码位于视图模型中(假设使用MVVM设计模式)，则测试此操作会容易得多。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3666449|entityMap|0|LINK|mutability|MUTABLE|url|http://xamlcoder.com/blog/2010/10/27/filtering-data-using-collectionviewsource/^0|5|K|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You can do this with a <a href="http://xamlcoder.com/blog/2010/10/27/filtering-data-using-collectionviewsource/" rel="nofollow">CollectionViewSource</a>. You wouldn't want to do this completely in XAML, as it would be much easier to test this if the filtering code is in your view model (assuming an MVVM design pattern).

blocks|key|3952152|text|没有办法只在XAML中实现这一点。但是还有另外两种方法:+1)使用转换器|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3952153|<TextBox+x:Name="text"/>
<ListBox+Tag="{Binding+ElementName=text}">
<ListBox.ItemContainerStyle>
<Style+TargetType="ListBoxItem">
<Setter+Property="Visibility"+Value="{Binding+RelativeSource={RelativeSource+AncestorType=ListBox},Path=Tag,+Converter={StaticResource+filterLogicConverter}}"/>
</Style>
</ListBox.ItemContainerStyle>
<LixtBox/>|code-block|syntax|javascript|3952154|2)更好、更自然的方法是使用CollectionView.Filter属性。它不会修改底层集合。|3952155|var+collectionView+=+CollectionViewSource.GetDefaultView(your_collection);
collectionView.Filter+=+filter_predicate|3952156|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

There is no way to accomplish this in XAML only. But there are other two ways:
1) using converter

<pre><code>&lt;TextBox x:Name="text"/&gt;
&lt;ListBox Tag="{Binding ElementName=text}"&gt;
&lt;ListBox.ItemContainerStyle&gt;
&lt;Style TargetType="ListBoxItem"&gt;
&lt;Setter Property="Visibility" Value="{Binding RelativeSource={RelativeSource AncestorType=ListBox},Path=Tag, Converter={StaticResource filterLogicConverter}}"/&gt;
&lt;/Style&gt;
&lt;/ListBox.ItemContainerStyle&gt;
&lt;LixtBox/&gt;
</code></pre>

2) better and more natural way is to use CollectionView.Filter property. It doesn't modify an underlying collection.

<pre><code>var collectionView = CollectionViewSource.GetDefaultView(your_collection);
collectionView.Filter = filter_predicate
</code></pre>

blocks|key|257964|text|在集合中项目的某些属性上使用数据触发器，您可以在xaml中完成所有操作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|257965|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Use a data trigger on some property of the item in the collectin and you can do it all in xaml.

blocks|key|258862|text|XAML真正做的唯一一件事就是以声明的方式封装逻辑。使用markup+extensions你可以做很多事情，下面是一个例子：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|258863|<StackPanel>
++++<StackPanel.Resources>
++++++++<CollectionViewSource+x:Key="items"+Source="{Binding+Data}">
++++++++++++<CollectionViewSource.Filter>
++++++++++++++++<me:Filter>
++++++++++++++++++++<me:PropertyFilter+PropertyName="Name"
++++++++++++++++++++++++++++RegexPattern="{Binding+Text,+Source={x:Reference+filterbox}}"+/>
++++++++++++++++</me:Filter>
++++++++++++</CollectionViewSource.Filter>
++++++++</CollectionViewSource>
++++</StackPanel.Resources>
++++<TextBox+Name="filterbox"+Text="Skeet">
++++++++<TextBox.TextChanged>
++++++++++++<me:ExecuteActionsHandler+ThrowOnException="false">
++++++++++++++++<me:CallMethodAction>
++++++++++++++++++++<me:CallMethodActionSettings+MethodName="Refresh"
++++++++++++++++++++++++++++TargetObject="{Binding+Source={StaticResource+items}}"+/>
++++++++++++++++</me:CallMethodAction>
++++++++++++</me:ExecuteActionsHandler>
++++++++</TextBox.TextChanged>
++++</TextBox>
++++
</StackPanel>|code-block|syntax|javascript|258864|(请注意，这是可行的，但它会触发每个图形用户界面设计器，而且事件也没有IntelliSense，因为它们通常不是通过元素语法设置的。)|258865|这里有几个标记扩展，其中两个创建处理程序，一个创建操作：|258866|258867|FilterExtension|unordered-list-item|258868|ExecuteActionsHandlerExtension|258869|CallMethodActionExtension|258870|258871|扩展如下所示：|258872|[ContentProperty("Filters")]
class+FilterExtension+:+MarkupExtension
{
++++private+readonly+Collection<IFilter>+_filters+=+new+Collection<IFilter>();
++++public+ICollection<IFilter>+Filters+{+get+{+return+_filters;+}+}

++++public+override+object+ProvideValue(IServiceProvider+serviceProvider)
++++{
++++++++return+new+FilterEventHandler((s,+e)+=>
++++++++++++{
++++++++++++++++foreach+(var+filter+in+Filters)
++++++++++++++++{
++++++++++++++++++++var+res+=+filter.Filter(e.Item);
++++++++++++++++++++if+(!res)
++++++++++++++++++++{
++++++++++++++++++++++++e.Accepted+=+false;
++++++++++++++++++++++++return;
++++++++++++++++++++}
++++++++++++++++}
++++++++++++++++e.Accepted+=+true;
++++++++++++});
++++}
}

public+interface+IFilter
{
++++bool+Filter(object+item);
}|258873|非常简单，只需循环遍历过滤器并应用它们。ExecuteActionsHandlerExtension也是如此|style|CODE|258874|[ContentProperty("Actions")]
public+class+ExecuteActionsHandlerExtension+:+MarkupExtension
{
++++private+readonly+Collection<Action>+_actions+=+new+Collection<Action>();
++++public+Collection<Action>+Actions+{+get+{+return+_actions;+}+}

++++public+bool+ThrowOnException+{+get;+set;+}

++++public+ExecuteActionsHandlerExtension()
++++{
++++++++ThrowOnException+=+true;
++++}

++++public+override+object+ProvideValue(IServiceProvider+serviceProvider)
++++{
++++++++return+new+RoutedEventHandler((s,+e)+=>
++++++++++++{
++++++++++++++++try
++++++++++++++++{
++++++++++++++++++++foreach+(var+action+in+Actions)
++++++++++++++++++++{
++++++++++++++++++++++++action.Invoke();
++++++++++++++++++++}
++++++++++++++++}
++++++++++++++++catch+(Exception)
++++++++++++++++{
++++++++++++++++++++if+(ThrowOnException)+throw;
++++++++++++++++}
++++++++++++});
++++}
}|258875|现在最后一个扩展有点复杂，因为它实际上需要做一些具体的事情：|258876|[ContentProperty("Settings")]
public+class+CallMethodActionExtension+:+MarkupExtension
{
++++//Needed+to+provide+dependency+properties+as+MarkupExtensions+cannot+have+any
++++public+CallMethodActionSettings+Settings+{+get;+set;+}

++++public+override+object+ProvideValue(IServiceProvider+serviceProvider)
++++{
++++++++return+new+Action(()+=>
++++++++++++{
++++++++++++++++bool+staticCall+=+Settings.TargetObject+==+null;
++++++++++++++++var+argsCast+=+Settings.MethodArguments.Cast<object>();
++++++++++++++++var+types+=+argsCast.Select(x+=>+x.GetType()).ToArray();
++++++++++++++++var+args+=+argsCast.ToArray();
++++++++++++++++MethodInfo+method;
++++++++++++++++if+(staticCall)
++++++++++++++++{
++++++++++++++++++++method+=+Settings.TargetType.GetMethod(Settings.MethodName,+types);
++++++++++++++++}
++++++++++++++++else
++++++++++++++++{
++++++++++++++++++++method+=+Settings.TargetObject.GetType().GetMethod(Settings.MethodName,+types);
++++++++++++++++}
++++++++++++++++method.Invoke(Settings.TargetObject,+args);
++++++++++++});
++++}
}

public+class+CallMethodActionSettings+:+DependencyObject
{
++++public+static+readonly+DependencyProperty+MethodNameProperty+=
++++++++DependencyProperty.Register("MethodName",+typeof(string),+typeof(CallMethodActionSettings),+new+UIPropertyMetadata(null));
++++public+string+MethodName
++++{
++++++++get+{+return+(string)GetValue(MethodNameProperty);+}
++++++++set+{+SetValue(MethodNameProperty,+value);+}
++++}

++++public+static+readonly+DependencyProperty+TargetObjectProperty+=
++++++++DependencyProperty.Register("TargetObject",+typeof(object),+typeof(CallMethodActionSettings),+new+UIPropertyMetadata(null));
++++public+object+TargetObject
++++{
++++++++get+{+return+(object)GetValue(TargetObjectProperty);+}
++++++++set+{+SetValue(TargetObjectProperty,+value);+}
++++}

++++public+static+readonly+DependencyProperty+TargetTypeProperty+=
++++++++DependencyProperty.Register("TargetType",+typeof(Type),+typeof(CallMethodActionSettings),+new+UIPropertyMetadata(null));
++++public+Type+TargetType
++++{
++++++++get+{+return+(Type)GetValue(TargetTypeProperty);+}
++++++++set+{+SetValue(TargetTypeProperty,+value);+}
++++}

++++public+static+readonly+DependencyProperty+MethodArgumentsProperty+=
++++++++DependencyProperty.Register("MethodArguments",+typeof(IList),+typeof(CallMethodActionSettings),+new+UIPropertyMetadata(null));
++++public+IList+MethodArguments
++++{
++++++++get+{+return+(IList)GetValue(MethodArgumentsProperty);+}
++++++++set+{+SetValue(MethodArgumentsProperty,+value);+}
++++}

++++public+CallMethodActionSettings()
++++{
++++++++MethodArguments+=+new+List<object>();
++++}
}|258877|所有这些片段都只是演示如何实现这一点的快速草稿。(属性过滤器实现的草案可以在中找到。)|258878|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/ee855815.aspx^0|S|H|0|0|0|0|0|0|0|0|0|0|0|0|K|U|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1J|8|@]|9|@$A|1K|B|1L|1|1M]]|C|$]]|$1|D|3|E|5|F|7|1N|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|1O|8|@]|9|@]|C|$]]|$1|K|3|L|5|6|7|1P|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|1Q|8|@]|9|@]|C|$]]|$1|N|3|O|5|P|7|1R|8|@]|9|@]|C|$]]|$1|Q|3|R|5|P|7|1S|8|@]|9|@]|C|$]]|$1|S|3|T|5|P|7|1T|8|@]|9|@]|C|$]]|$1|U|3|-4|5|6|7|1U|8|@]|9|@]|C|$]]|$1|V|3|W|5|6|7|1V|8|@]|9|@]|C|$]]|$1|X|3|Y|5|F|7|1W|8|@]|9|@]|C|$G|H]]|$1|Z|3|10|5|6|7|1X|8|@$A|1Y|B|1Z|11|12]]|9|@]|C|$]]|$1|13|3|14|5|F|7|20|8|@]|9|@]|C|$G|H]]|$1|15|3|16|5|6|7|21|8|@]|9|@]|C|$]]|$1|17|3|18|5|F|7|22|8|@]|9|@]|C|$G|H]]|$1|19|3|1A|5|6|7|23|8|@]|9|@]|C|$]]|$1|1B|3|-4|5|6|7|24|8|@]|9|@]|C|$]]]|1C|$1D|$5|1E|1F|1G|C|$1H|1I]]]]

The only thing XAML really does is encapsulating logic in a declarative fashion. Using <a href="http://msdn.microsoft.com/en-us/library/ee855815.aspx" rel="nofollow noreferrer">markup extensions</a> you can do quite a lot, here's an example:

<pre><code>&lt;StackPanel&gt;
 &lt;StackPanel.Resources&gt;
 &lt;CollectionViewSource x:Key="items" Source="{Binding Data}"&gt;
 &lt;CollectionViewSource.Filter&gt;
 &lt;me:Filter&gt;
 &lt;me:PropertyFilter PropertyName="Name"
 RegexPattern="{Binding Text, Source={x:Reference filterbox}}" /&gt;
 &lt;/me:Filter&gt;
 &lt;/CollectionViewSource.Filter&gt;
 &lt;/CollectionViewSource&gt;
 &lt;/StackPanel.Resources&gt;
 &lt;TextBox Name="filterbox" Text="Skeet"&gt;
 &lt;TextBox.TextChanged&gt;
 &lt;me:ExecuteActionsHandler ThrowOnException="false"&gt;
 &lt;me:CallMethodAction&gt;
 &lt;me:CallMethodActionSettings MethodName="Refresh"
 TargetObject="{Binding Source={StaticResource items}}" /&gt;
 &lt;/me:CallMethodAction&gt;
 &lt;/me:ExecuteActionsHandler&gt;
 &lt;/TextBox.TextChanged&gt;
 &lt;/TextBox&gt;
 &lt;!-- ListView here --&gt;
&lt;/StackPanel&gt;
</code></pre>

(Note that this works but it will trip every GUI designer, also there is no IntelliSense for the events as they usually are not set via element syntax.)

There are several markup extensions here of which two create handlers and one creates an action:

<ul>
<li>FilterExtension</li>
<li>ExecuteActionsHandlerExtension</li>
<li>CallMethodActionExtension</li>
</ul>

The extensions look like this:

<pre><code>[ContentProperty("Filters")]
class FilterExtension : MarkupExtension
{
 private readonly Collection&lt;IFilter&gt; _filters = new Collection&lt;IFilter&gt;();
 public ICollection&lt;IFilter&gt; Filters { get { return _filters; } }

 public override object ProvideValue(IServiceProvider serviceProvider)
 {
 return new FilterEventHandler((s, e) =&gt;
 {
 foreach (var filter in Filters)
 {
 var res = filter.Filter(e.Item);
 if (!res)
 {
 e.Accepted = false;
 return;
 }
 }
 e.Accepted = true;
 });
 }
}

public interface IFilter
{
 bool Filter(object item);
}
</code></pre>

Quite straightforward, just loops through filters and applies them. Same goes for the <code>ExecuteActionsHandlerExtension</code>:

<pre><code>[ContentProperty("Actions")]
public class ExecuteActionsHandlerExtension : MarkupExtension
{
 private readonly Collection&lt;Action&gt; _actions = new Collection&lt;Action&gt;();
 public Collection&lt;Action&gt; Actions { get { return _actions; } }

 public bool ThrowOnException { get; set; }

 public ExecuteActionsHandlerExtension()
 {
 ThrowOnException = true;
 }

 public override object ProvideValue(IServiceProvider serviceProvider)
 {
 return new RoutedEventHandler((s, e) =&gt;
 {
 try
 {
 foreach (var action in Actions)
 {
 action.Invoke();
 }
 }
 catch (Exception)
 {
 if (ThrowOnException) throw;
 }
 });
 }
}
</code></pre>

Now the last extension is a bit more complicated as it actually needs to do something concrete:

<pre><code>[ContentProperty("Settings")]
public class CallMethodActionExtension : MarkupExtension
{
 //Needed to provide dependency properties as MarkupExtensions cannot have any
 public CallMethodActionSettings Settings { get; set; }

 public override object ProvideValue(IServiceProvider serviceProvider)
 {
 return new Action(() =&gt;
 {
 bool staticCall = Settings.TargetObject == null;
 var argsCast = Settings.MethodArguments.Cast&lt;object&gt;();
 var types = argsCast.Select(x =&gt; x.GetType()).ToArray();
 var args = argsCast.ToArray();
 MethodInfo method;
 if (staticCall)
 {
 method = Settings.TargetType.GetMethod(Settings.MethodName, types);
 }
 else
 {
 method = Settings.TargetObject.GetType().GetMethod(Settings.MethodName, types);
 }
 method.Invoke(Settings.TargetObject, args);
 });
 }
}

public class CallMethodActionSettings : DependencyObject
{
 public static readonly DependencyProperty MethodNameProperty =
 DependencyProperty.Register("MethodName", typeof(string), typeof(CallMethodActionSettings), new UIPropertyMetadata(null));
 public string MethodName
 {
 get { return (string)GetValue(MethodNameProperty); }
 set { SetValue(MethodNameProperty, value); }
 }

 public static readonly DependencyProperty TargetObjectProperty =
 DependencyProperty.Register("TargetObject", typeof(object), typeof(CallMethodActionSettings), new UIPropertyMetadata(null));
 public object TargetObject
 {
 get { return (object)GetValue(TargetObjectProperty); }
 set { SetValue(TargetObjectProperty, value); }
 }

 public static readonly DependencyProperty TargetTypeProperty =
 DependencyProperty.Register("TargetType", typeof(Type), typeof(CallMethodActionSettings), new UIPropertyMetadata(null));
 public Type TargetType
 {
 get { return (Type)GetValue(TargetTypeProperty); }
 set { SetValue(TargetTypeProperty, value); }
 }

 public static readonly DependencyProperty MethodArgumentsProperty =
 DependencyProperty.Register("MethodArguments", typeof(IList), typeof(CallMethodActionSettings), new UIPropertyMetadata(null));
 public IList MethodArguments
 {
 get { return (IList)GetValue(MethodArgumentsProperty); }
 set { SetValue(MethodArgumentsProperty, value); }
 }

 public CallMethodActionSettings()
 {
 MethodArguments = new List&lt;object&gt;();
 }
}
</code></pre>

All of these snippets are just quick drafts to demonstrate how one could approach this. (A draft for the property filter implementation can be found in <a href="https://stackoverflow.com/questions/6461826/in-wpf-can-you-filter-a-collectionviewsource-without-code-behind/6462282#6462282">this answer</a>.)

blocks|key|258894|text|就像CodeNaked和devdigital告诉你的那样，CollectionViewSource/CollectionView/ICollectionView是你实现目标的关键|type|unstyled|depth|inlineStyleRanges|entityRanges|data|258895|258896|，这是一个MVVM模式，但这是一个仅与查看相关的问题，所以我不想在ViewModel上看到这段代码。|blockquote|258897|258898|258899|这不是正确的方式，因为视图只显示她得到了什么，而不应该修改，所以应该/必须是你的ViewModel更改|258900|所以现在来看一些代码片段：|258901|++++public+class+myVM
++++{
++++++++public+CollectionViewSource+CollViewSource+{+get;+set;+}
++++++++public+string+SearchFilter
++++++++{
++++++++++++get;
++++++++++++set
++++++++++++{
++++++++++++++if(!string.IsNullOrEmpty(SearchFilter))
+++++++++++++++++AddFilter();

++++++++++++++++CollViewSource.View.Refresh();+//+important+to+refresh+your+View
++++++++++++}
++++++++}
++++++++public+myVM(YourCollection)
++++++++{
++++++++++++CollViewSource+=+new+CollectionViewSource();//onload+of+your+VM+class
++++++++++++CollViewSource.Source+=+YourCollection;//after+ini+YourCollection
++++++++}
++++}|code-block|syntax|javascript|258902|Xaml片段：|258903|++++<StackPanel>
++++++++<TextBox+Height="23"+HorizontalAlignment="Left"++Name="tB"+VerticalAlignment="Top"+
+++++++++++++++++Width="120"+Text="{Binding+SearchFilter,UpdateSourceTrigger=PropertyChanged}"+/>
++++++++<DataGrid+Name="testgrid"+ItemsSource="{Binding+CollViewSource.View}"/>
++++</StackPanel>|258904|编辑我忘记了过滤器|258905|private+void+AddFilter()
{
++++CollViewSource.Filter+-=+new+FilterEventHandler(Filter);
++++CollViewSource.Filter+%2B=+new+FilterEventHandler(Filter);++

}

private+void+Filter(object+sender,+FilterEventArgs+e)
{
++++//+see+Notes+on+Filter+Methods:
++++var+src+=+e.Item+as+YourCollectionItemTyp;
++++if+(src+==+null)
++++++++e.Accepted+=+false;
++++else+if+(+src.FirstName+!=null+&&+!src.FirstName.Contains(SearchFilter))//+here+is+FirstName+a+Property+in+my+YourCollectionItem
++++++++e.Accepted+=+false;
}|258906|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|11|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|12|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|13|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|14|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|15|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|16|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|17|8|@]|9|@]|A|$O|P]]|$1|Q|3|R|5|6|7|18|8|@]|9|@]|A|$]]|$1|S|3|T|5|N|7|19|8|@]|9|@]|A|$O|P]]|$1|U|3|V|5|6|7|1A|8|@]|9|@]|A|$]]|$1|W|3|X|5|N|7|1B|8|@]|9|@]|A|$O|P]]|$1|Y|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|Z|$]]

Like CodeNaked and devdigital told you CollectionViewSource/CollectionView/ICollectionView
are the keys to your goal

<blockquote>
 It's a MVVM patter but this is a View only related problem so I don't
 want this code at the ViewModel.
</blockquote>

thats not the right way because the View only shows what she get´s but shouldn´t modifi 
so it should/must be your ViewModel who handel changes

so now some code snips:

<pre><code> public class myVM
 {
 public CollectionViewSource CollViewSource { get; set; }
 public string SearchFilter
 {
 get;
 set
 {
 if(!string.IsNullOrEmpty(SearchFilter))
 AddFilter();

 CollViewSource.View.Refresh(); // important to refresh your View
 }
 }
 public myVM(YourCollection)
 {
 CollViewSource = new CollectionViewSource();//onload of your VM class
 CollViewSource.Source = YourCollection;//after ini YourCollection
 }
 }
</code></pre>

Xaml Snip:

<pre><code> &lt;StackPanel&gt;
 &lt;TextBox Height="23" HorizontalAlignment="Left" Name="tB" VerticalAlignment="Top" 
 Width="120" Text="{Binding SearchFilter,UpdateSourceTrigger=PropertyChanged}" /&gt;
 &lt;DataGrid Name="testgrid" ItemsSource="{Binding CollViewSource.View}"/&gt;
 &lt;/StackPanel&gt;
</code></pre>

Edit i forgot the Filter

<pre><code>private void AddFilter()
{
 CollViewSource.Filter -= new FilterEventHandler(Filter);
 CollViewSource.Filter += new FilterEventHandler(Filter); 

}

private void Filter(object sender, FilterEventArgs e)
{
 // see Notes on Filter Methods:
 var src = e.Item as YourCollectionItemTyp;
 if (src == null)
 e.Accepted = false;
 else if ( src.FirstName !=null &amp;&amp; !src.FirstName.Contains(SearchFilter))// here is FirstName a Property in my YourCollectionItem
 e.Accepted = false;
}
</code></pre>

I currently have a ListBox binded to a collection of items. As the collection is big we want to filter the items being shown based on the text entered on a TextBox. 

What I'm asking is if this is possible to implement using only XAML, I don't want to modify the collection of items, I would like to modify the Visibility of each of the items based on the filter.

Hope its clear,

thanks!

Filter items of a ListBox based on the text of a TextBox using only XAML in WPF

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我目前有一个绑定到一个项目集合的ListBox。由于集合很大，我们希望根据在TextBox上输入的文本来过滤要显示的项。我想问的是，这是否可以只使用XAML实现，我不想修改项的集合，我想基于过滤器修改每个项的可见性。希望天气晴朗，谢谢!

问在WPF中仅使用XAML根据ListBox的文本筛选TextBox项
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问在WPF中仅使用XAML根据ListBox的文本筛选TextBox项EN