blocks|key|3314733|text|3.5sp1将StringFormat引入到绑定表达式中，例如|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3314734|<TextBox+Text="{Binding+Date,+StringFormat='{}{0:MM/dd/yyyy}'}"+/>|code-block|syntax|javascript|3314735|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

3.5sp1 introduced StringFormat into binding expressions, e.g.

<pre><code>&lt;TextBox Text="{Binding Date, StringFormat='{}{0:MM/dd/yyyy}'}" /&gt;
</code></pre>

blocks|key|337092|text|Multibinding+(与StringFormat组合)：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|337093|<TextBlock>
++<TextBlock.Text>
++++<MultiBinding+StringFormat="{}{0},+{1}">
++++++<Binding+Path="LastName"+/>
++++++<Binding+Path="FirstName"+/>
++++</MultiBinding>
++</TextBlock.Text>
</TextBlock>|code-block|syntax|javascript|337094|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.windows.data.multibinding.aspx^0|0|C|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

<a href="http://msdn.microsoft.com/en-us/library/system.windows.data.multibinding.aspx" rel="nofollow noreferrer">Multibinding</a> (combined with StringFormat):

<pre><code>&lt;TextBlock&gt;
 &lt;TextBlock.Text&gt;
 &lt;MultiBinding StringFormat="{}{0}, {1}"&gt;
 &lt;Binding Path="LastName" /&gt;
 &lt;Binding Path="FirstName" /&gt;
 &lt;/MultiBinding&gt;
 &lt;/TextBlock.Text&gt;
&lt;/TextBlock&gt;
</code></pre>

blocks|key|3101916|text|3.5sp1将TargetNullValue引入了绑定。如果输入了值，这会将bound属性设置为Null，如果您的属性为Null，则会显示此值。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3101917|<TextBox+Text="{Binding+Total,+TargetNullValue=$0.00}"+/>|code-block|syntax|javascript|3101918|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

3.5sp1 introduced TargetNullValue to bindings. This will set the bound property to Null if the value is entered and if your property is Null it will display this value.

<pre><code>&lt;TextBox Text="{Binding Total, TargetNullValue=$0.00}" /&gt;
</code></pre>

blocks|key|334615|text|网格大小共享(here's是一个很好的例子)。长话短说，你可以让网格的列和行共享大小，即使是跨不同的网格。这对于所有使用DataGrids而不需要就地编辑数据的人来说将是无价的。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|334616|entityMap|0|LINK|mutability|MUTABLE|url|http://blogs.interknowlogy.com/johnbowen/archive/2007/08/27/21132.aspx^0|7|6|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]]]]

Grid size sharing (<a href="http://blogs.interknowlogy.com/johnbowen/archive/2007/08/27/21132.aspx" rel="nofollow noreferrer">here's</a> a good example). Long story short you can have grid columns and rows share sizes, even across different grids. This will be invaluable for all the people out there who are using DataGrids without the need to edit the data in place.

blocks|key|334651|text|在任何特定的场景中，还可以使用PresentationTraceSources.TraceLevel技巧来调试绑定的执行情况。您所要做的就是引用WindowsBase程序集中的System.Diagnostics命名空间|type|unstyled|depth|inlineStyleRanges|entityRanges|data|334652|xmlns:sd="clr-namespace:System.Diagnostics;assembly=WindowsBase"|code-block|syntax|javascript|334653|然后将以下内容添加到绑定表达式中：|334654|<TextBlock+Text="{Binding+Message,+sd:PresentationTraceSources.TraceLevel=High}"++/>|334655|日志将如下所示：|334656|System.Windows.Data+Warning:+52+:+Created+BindingExpression+(hash=5923895)+for+Binding+(hash=7588182)
System.Windows.Data+Warning:+54+:+++Path:+'Message'
System.Windows.Data+Warning:+56+:+BindingExpression+(hash=5923895):+Default+mode+resolved+to+OneWay
System.Windows.Data+Warning:+57+:+BindingExpression+(hash=5923895):+Default+update+trigger+resolved+to+PropertyChanged
System.Windows.Data+Warning:+58+:+BindingExpression+(hash=5923895):+Attach+to+System.Windows.Controls.TextBlock.Text+(hash=65248697)
System.Windows.Data+Warning:+63+:+BindingExpression+(hash=5923895):+Resolving+source+|334657|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

There is also PresentationTraceSources.TraceLevel trick to debug what is going on with bindings in any particular scenario. All you have to do is to reference System.Diagnostics namespace in WindowsBase assembly 

<pre><code>xmlns:sd="clr-namespace:System.Diagnostics;assembly=WindowsBase"
</code></pre>

and then add following to the binding expression:

<pre><code>&lt;TextBlock Text="{Binding Message, sd:PresentationTraceSources.TraceLevel=High}" /&gt;
</code></pre>

Log will be like this:

<pre><code>System.Windows.Data Warning: 52 : Created BindingExpression (hash=5923895) for Binding (hash=7588182)
System.Windows.Data Warning: 54 : Path: 'Message'
System.Windows.Data Warning: 56 : BindingExpression (hash=5923895): Default mode resolved to OneWay
System.Windows.Data Warning: 57 : BindingExpression (hash=5923895): Default update trigger resolved to PropertyChanged
System.Windows.Data Warning: 58 : BindingExpression (hash=5923895): Attach to System.Windows.Controls.TextBlock.Text (hash=65248697)
System.Windows.Data Warning: 63 : BindingExpression (hash=5923895): Resolving source 
</code></pre>

blocks|key|3102038|text|这并不是一个真正的隐藏特性，但是使用WPF/XAML可以获得Bea+Stollnitz和Josh+Smith。WPF/XAML编程的女王和国王。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3102039|entityMap|0|LINK|mutability|MUTABLE|url|http://bea.stollnitz.com/blog/|1|http://joshsmithonwpf.wordpress.com/^0|U|D|0|18|A|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

Not really a hidden feature but with WPF/XAML you get <a href="http://bea.stollnitz.com/blog/" rel="nofollow noreferrer">Bea Stollnitz</a> and <a href="http://joshsmithonwpf.wordpress.com/" rel="nofollow noreferrer">Josh Smith</a>. Queen and King of WPF/XAML programming.

blocks|key|336170|text|高级"caption“属性|type|unstyled|depth|inlineStyleRanges|entityRanges|data|336171|另一件不太清楚的事情是，我们习惯于只包含文本的一些属性的内容。如果GUI元素的属性是Object类型，您很可能可以根据需要添加一个包含一组控件的面板，而不只是设置文本。|336172|这方面的一个例子是MenuItem，其中Header属性(通常只包含文本)可以包含一组包装在面板控件中的gui元素(如果只需要一个gui元素，也可以只包含一个gui元素)。|offset|length|style|CODE|336173|还要注意MenuItem上的Icon属性。它通常包含一个Image元素，但它也可以包含任何内容！|336174|<MenuItem+Name="MyMenuItem"+Click="MyMenuItem_Click">
++<MenuItem.Icon>
++++<Button+Click="Button1_Click">i</Button>
++</MenuItem.Icon>
++<MenuItem.Header>
+++++<StackPanel+Orientation="Horizontal"+>
++++++++<Label>My+text</Label>
++++++++<Button+Click="Button2_Click">ClickMe!</Button>
+++++</StackPanel>
++</MenuItem.Header>
</MenuItem>|code-block|syntax|javascript|336175|entityMap^0|0|0|K|6|0|E|4|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@$F|V|G|W|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|X|8|@$F|Y|G|Z|H|I]]|9|@]|A|$]]|$1|L|3|M|5|N|7|10|8|@]|9|@]|A|$O|P]]|$1|Q|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|R|$]]

<h1>Advanced &quot;caption&quot; properties</h1>
Another thing that is not very clear is the contents of some properties that we are used to contains only text. If the property of a GUI element is of type Object, it is very likely that you can, instead of just setting the text, add a panel of your need that includes a set of controls.
An example of this is the MenuItem, where the <code>Header</code> property (which normally just contains text) can contain a set of gui elements wrapped in a panel control (or just one gui element if you need just one).
Also note the <code>Icon</code> property on the MenuItem. This normally contains an Image element, but this also can contain anything!
<pre><code>&lt;MenuItem Name=&quot;MyMenuItem&quot; Click=&quot;MyMenuItem_Click&quot;&gt;
 &lt;MenuItem.Icon&gt;
 &lt;Button Click=&quot;Button1_Click&quot;&gt;i&lt;/Button&gt;
 &lt;/MenuItem.Icon&gt;
 &lt;MenuItem.Header&gt;
 &lt;StackPanel Orientation=&quot;Horizontal&quot; &gt;
 &lt;Label&gt;My text&lt;/Label&gt;
 &lt;Button Click=&quot;Button2_Click&quot;&gt;ClickMe!&lt;/Button&gt;
 &lt;/StackPanel&gt;
 &lt;/MenuItem.Header&gt;
&lt;/MenuItem&gt;
</code></pre>

blocks|key|3102103|text|标记扩展和附加属性是我最喜欢的特性，它们使您能够以一种非常优雅的方式扩展XAML“词汇表”。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3102104|标记扩展|offset|length|style|BOLD|3102105|
<CheckBox+IsChecked="{my:SettingBinding+MinimizeToTray}">Close+to+tray</CheckBox>


<ComboBox+ItemsSource="{my:EnumValues+sys:DaysOfWeek}"/>


<TextBlock+Text="{my:Localize+HelloWorld.Text}"/>


<TextBlock+Text="{my:Switch+Path=IsGood,+ValueIfTrue=Good,+ValueIfFalse=Bad}"/>|code-block|syntax|javascript|3102106|附加属性|3102107|
<ListView+ItemsSource="{Binding+Persons}"
++++++IsSynchronizedWithCurrentItem="True"
++++++util:GridViewSort.AutoSort="True">
++++<ListView.View>
++++++++<GridView>
++++++++++++<GridView.Columns>
++++++++++++++++<GridViewColumn+Header="Name"
++++++++++++++++++++++++++++++++DisplayMemberBinding="{Binding+Name}"
++++++++++++++++++++++++++++++++util:GridViewSort.PropertyName="Name"/>
++++++++++++++++<GridViewColumn+Header="First+name"
++++++++++++++++++++++++++++++++DisplayMemberBinding="{Binding+FirstName}"
++++++++++++++++++++++++++++++++util:GridViewSort.PropertyName="FirstName"/>
++++++++++++++++<GridViewColumn+Header="Date+of+birth"
++++++++++++++++++++++++++++++++DisplayMemberBinding="{Binding+DateOfBirth}"
++++++++++++++++++++++++++++++++util:GridViewSort.PropertyName="DateOfBirth"/>
++++++++++++</GridView.Columns>
++++++++</GridView>
++++</ListView.View>
</ListView>



<Window+x:Class="WpfApplication1.Window1"
++++++++xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
++++++++xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
++++++++xmlns:my="clr-namespace:WpfApplication1"
++++++++Title="Window1"
++++++++my:WinUtil.EnableAeroGlass="True">

...|3102108|GridViewSort的源代码(顺便说一句，它使用了Ortus提到的GridViewColumnHeader.Click事件)|CODE|3102109|entityMap|0|LINK|mutability|MUTABLE|url|http://tomlev2.wordpress.com/2009/03/27/wpf-automatically-sort-a-gridview-when-a-column-header-is-clicked/^0|0|0|4|0|0|0|4|0|0|Z|Q|0|C|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|12|8|@$D|13|E|14|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|15|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|16|8|@$D|17|E|18|F|G]]|9|@]|A|$]]|$1|O|3|P|5|J|7|19|8|@]|9|@]|A|$K|L]]|$1|Q|3|R|5|6|7|1A|8|@$D|1B|E|1C|F|S]]|9|@$D|1D|E|1E|1|1F]]|A|$]]|$1|T|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|U|$V|$5|W|X|Y|A|$Z|10]]]]

Markup extensions and attached properties are my favorite features, they enable you to extend XAML "vocabulary" in a very elegant way.

Markup extensions

<pre><code>&lt;!-- Binding to app settings --&gt;
&lt;CheckBox IsChecked="{my:SettingBinding MinimizeToTray}"&gt;Close to tray&lt;/CheckBox&gt;

&lt;!-- Fill ItemsControl with the values of an enum --&gt;
&lt;ComboBox ItemsSource="{my:EnumValues sys:DaysOfWeek}"/&gt;

&lt;!-- Localization --&gt;
&lt;TextBlock Text="{my:Localize HelloWorld.Text}"/&gt;

&lt;!-- Switch on the result of a binding --&gt;
&lt;TextBlock Text="{my:Switch Path=IsGood, ValueIfTrue=Good, ValueIfFalse=Bad}"/&gt;
</code></pre>

Attached properties

<pre><code>&lt;!-- Sort GridView automatically --&gt;
&lt;ListView ItemsSource="{Binding Persons}"
 IsSynchronizedWithCurrentItem="True"
 util:GridViewSort.AutoSort="True"&gt;
 &lt;ListView.View&gt;
 &lt;GridView&gt;
 &lt;GridView.Columns&gt;
 &lt;GridViewColumn Header="Name"
 DisplayMemberBinding="{Binding Name}"
 util:GridViewSort.PropertyName="Name"/&gt;
 &lt;GridViewColumn Header="First name"
 DisplayMemberBinding="{Binding FirstName}"
 util:GridViewSort.PropertyName="FirstName"/&gt;
 &lt;GridViewColumn Header="Date of birth"
 DisplayMemberBinding="{Binding DateOfBirth}"
 util:GridViewSort.PropertyName="DateOfBirth"/&gt;
 &lt;/GridView.Columns&gt;
 &lt;/GridView&gt;
 &lt;/ListView.View&gt;
&lt;/ListView&gt;


&lt;!-- Vista Glass effect --&gt;
&lt;Window x:Class="WpfApplication1.Window1"
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 xmlns:my="clr-namespace:WpfApplication1"
 Title="Window1"
 my:WinUtil.EnableAeroGlass="True"&gt;

...
</code></pre>

Source for <a href="http://tomlev2.wordpress.com/2009/03/27/wpf-automatically-sort-a-gridview-when-a-column-header-is-clicked/" rel="nofollow noreferrer">GridViewSort</a> (btw, it uses the <code>GridViewColumnHeader.Click</code> event mentioned by Ortus)

blocks|key|3102124|text|有时你得到的字符串太长，无法在标签上显示。在这种情况下，我们可以利用TextBlock的TextTrimming属性来显示椭圆|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|BOLD|entityRanges|data|3102125|<TextBlock+
++Name="sampleTextBlock"+
++TextTrimming="WordEllipsis"+
++TextWrapping="NoWrap"/>|code-block|syntax|javascript|3102126|MSDN+Link|3102127|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.windows.controls.textblock.texttrimming.aspx^0|Y|9|18|C|18|C|0|0|0|9|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]|$9|Y|A|Z|B|C]|$9|10|A|11|B|D]]|E|@]|F|$]]|$1|G|3|H|5|I|7|12|8|@]|E|@]|F|$J|K]]|$1|L|3|M|5|6|7|13|8|@]|E|@$9|14|A|15|1|16]]|F|$]]|$1|N|3|-4|5|6|7|17|8|@]|E|@]|F|$]]]|O|$P|$5|Q|R|S|F|$T|U]]]]

Sometimes you get string that is too long to show on label. In this case we can make use of <code>TextTrimming</code> property of <code>TextBlock</code> to show Ellipses

<pre><code>&lt;TextBlock 
 Name="sampleTextBlock" 
 TextTrimming="WordEllipsis" 
 TextWrapping="NoWrap"/&gt;
</code></pre>

<a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.textblock.texttrimming.aspx" rel="nofollow noreferrer">MSDN Link</a>

blocks|key|3102129|text|。允许您以“先来先看”的顺序使用asyn绑定：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3102130|<TextBlock.Text>
++++++<PriorityBinding+FallbackValue="defaultvalue">
++++++++<Binding+Path="SlowestDP"+IsAsync="True"/>
++++++++<Binding+Path="SlowerDP"+IsAsync="True"/>
++++++++<Binding+Path="FastDP"+/>
++++++</PriorityBinding>
</TextBlock.Text>|code-block|syntax|javascript|3102131|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<a href="http://msdn.microsoft.com/en-us/library/system.windows.data.prioritybinding.aspx" rel="nofollow noreferrer">PriorityBinding</a>. Allows you to use asyn bindings in an "first come first show" order:

<pre><code>&lt;TextBlock.Text&gt;
 &lt;PriorityBinding FallbackValue="defaultvalue"&gt;
 &lt;Binding Path="SlowestDP" IsAsync="True"/&gt;
 &lt;Binding Path="SlowerDP" IsAsync="True"/&gt;
 &lt;Binding Path="FastDP" /&gt;
 &lt;/PriorityBinding&gt;
&lt;/TextBlock.Text&gt;
</code></pre>

blocks|key|3102148|text|系统颜色用法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3102149|<Border+Background="{DynamicResource+{x:Static+SystemColors.InactiveBorderBrushKey}}"/>|code-block|syntax|javascript|3102150|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<h2>System Colors Usage</h2>

<pre><code>&lt;Border Background="{DynamicResource {x:Static SystemColors.InactiveBorderBrushKey}}"/&gt;
</code></pre>

blocks|key|334707|text|可以使用加号(%2B)引用XAML中的嵌套类型。例如，如果我们有这样的类：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|334708|public+class+SomeClass
{
++++public+enum+SomeEnum
++++{
++++++++SomeValue
++++};
}|code-block|syntax|javascript|334709|我们可以使用以下语法在XAML中引用SomeValue：|334710|{x:Static+local:SomeClass%2BSomeEnum.SomeValue}|334711|此语法为not+documented+on+MSDN，不受官方支持。有人在MSDN论坛上使用asked+about+it，显然它破坏了vs2010的WPF设计器。它在微软连接上有been+reported。|334712|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/ms742135.aspx|1|http://social.msdn.microsoft.com/forums/en-US/wpf/thread/12f3e120-e217-4eee-ab49-490b70031806/|2|https://connect.microsoft.com/VisualStudio/feedback/details/361509/xaml-designer-cannot-handle-typename-with-nested-classes?wa=wsignin1.0^0|7|1|0|0|I|9|0|0|4|M|0|1A|E|1|2H|D|2|0^^$0|@$1|2|3|4|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|16|8|@$9|17|A|18|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|19|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1A|8|@]|D|@$9|1B|A|1C|1|1D]|$9|1E|A|1F|1|1G]|$9|1H|A|1I|1|1J]]|E|$]]|$1|Q|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]|Y|$5|T|U|V|E|$W|Z]]|10|$5|T|U|V|E|$W|11]]]]

You can refer to nested types in XAML using the plus sign (<code>+</code>). For example, if we had this class:

<pre><code>public class SomeClass
{
 public enum SomeEnum
 {
 SomeValue
 };
}
</code></pre>

We could refer to <code>SomeValue</code> in XAML using the following syntax:

<pre><code>{x:Static local:SomeClass+SomeEnum.SomeValue}
</code></pre>

This syntax is <a href="http://msdn.microsoft.com/en-us/library/ms742135.aspx" rel="nofollow">not documented on MSDN</a>, and it is not officially supported. Someone <a href="http://social.msdn.microsoft.com/forums/en-US/wpf/thread/12f3e120-e217-4eee-ab49-490b70031806/" rel="nofollow">asked about it</a> on the MSDN forums, and apparently it breaks VS2010's WPF Designer. It has <a href="https://connect.microsoft.com/VisualStudio/feedback/details/361509/xaml-designer-cannot-handle-typename-with-nested-classes?wa=wsignin1.0" rel="nofollow">been reported</a> on Microsoft Connect.

blocks|key|3315041|text|将UIElement填充到TextBlock中的功能|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3315042|我不知道这有多大用处(尽管它被认为是隐藏的)。但是当我first+ran+into+it的时候它确实让我猝不及防|3315043|<Grid+x:Name="LayoutRoot">
++++<TextBlock+HorizontalAlignment="Center"+VerticalAlignment="Center">
++++++++<Grid>
++++++++++++<Rectangle+Fill="AliceBlue"+Width="25"+Height="25"/>
++++++++</Grid>
++++</TextBlock>
</Grid>|code-block|syntax|javascript|3315044|您可能会认为以下xaml可能很有用(例如，将图形放在某些文本的末尾)：|3315045|<Grid>
++++<TextBlock+HorizontalAlignment="Center"+VerticalAlignment="Center"+Text="Hello+World">
++++++++<TextBlock.Resources>
++++++++++++<DrawingBrush+x:Key="exclamationPoint"+Stretch="Uniform">
++++++++++++++++<DrawingBrush.Drawing>
++++++++++++++++++++<DrawingGroup>
++++++++++++++++++++++++<DrawingGroup.Children>
++++++++++++++++++++++++++++<GeometryDrawing+Brush="#FF375CE2"+Geometry="F1+M+7.968,58.164L+0,58.164L+1.914,49.921L+9.882,49.921L+7.968,58.164+Z+M+21.796,0L+11.054,42.148L+4.403,42.148L+13.049,0L+21.796,0+Z+"/>
++++++++++++++++++++++++</DrawingGroup.Children>
++++++++++++++++++++</DrawingGroup>
++++++++++++++++</DrawingBrush.Drawing>
++++++++++++</DrawingBrush>
++++++++</TextBlock.Resources>
++++++++<Grid>
++++++++++++<Rectangle+Width="100"+Height="100"+Fill="{StaticResource+exclamationPoint}"/>
++++++++</Grid>
++++</TextBlock>
</Grid>|3315046|上面的xaml呈现方式如下：|3315047|​|3315048|📷|atomic|3315049|3315050|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/3409587/how-is-it-possible-to-stuff-a-grid-inside-a-textblock|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/8cb1b35d1bc48b78691fc9027494ad49.jpeg|imageAlt^0|0|M|0|R|H|0|0|0|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|1C|8|@$9|1D|A|1E|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1F|8|@]|D|@$9|1G|A|1H|1|1I]]|E|$]]|$1|H|3|I|5|J|7|1J|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|1K|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|1L|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|1M|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1N|8|@]|D|@]|E|$]]|$1|U|3|V|5|W|7|1O|8|@]|D|@$9|1P|A|1Q|1|1R]]|E|$]]|$1|X|3|T|5|6|7|1S|8|@]|D|@]|E|$]]|$1|Y|3|-4|5|6|7|1T|8|@]|D|@]|E|$]]]|Z|$10|$5|11|12|13|E|$14|15]]|16|$5|17|12|18|E|$19|1A|1B|-4]]]]

The Ability to Stuff UIElement(s) into a TextBlock

I don't know how useful (it qualifies as hidden though) this is ... but it sure caught me off-guard when I <a href="https://stackoverflow.com/questions/3409587/how-is-it-possible-to-stuff-a-grid-inside-a-textblock">first ran into it</a>:

<pre><code>&lt;Grid x:Name="LayoutRoot"&gt;
 &lt;TextBlock HorizontalAlignment="Center" VerticalAlignment="Center"&gt;
 &lt;Grid&gt;
 &lt;Rectangle Fill="AliceBlue" Width="25" Height="25"/&gt;
 &lt;/Grid&gt;
 &lt;/TextBlock&gt;
&lt;/Grid&gt;
</code></pre>

You could argue the following xaml could be useful (i.e. putting a graphic at the end of some text):

<pre><code>&lt;Grid&gt;
 &lt;TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Text="Hello World"&gt;
 &lt;TextBlock.Resources&gt;
 &lt;DrawingBrush x:Key="exclamationPoint" Stretch="Uniform"&gt;
 &lt;DrawingBrush.Drawing&gt;
 &lt;DrawingGroup&gt;
 &lt;DrawingGroup.Children&gt;
 &lt;GeometryDrawing Brush="#FF375CE2" Geometry="F1 M 7.968,58.164L 0,58.164L 1.914,49.921L 9.882,49.921L 7.968,58.164 Z M 21.796,0L 11.054,42.148L 4.403,42.148L 13.049,0L 21.796,0 Z "/&gt;
 &lt;/DrawingGroup.Children&gt;
 &lt;/DrawingGroup&gt;
 &lt;/DrawingBrush.Drawing&gt;
 &lt;/DrawingBrush&gt;
 &lt;/TextBlock.Resources&gt;
 &lt;Grid&gt;
 &lt;Rectangle Width="100" Height="100" Fill="{StaticResource exclamationPoint}"/&gt;
 &lt;/Grid&gt;
 &lt;/TextBlock&gt;
&lt;/Grid&gt;
</code></pre>

The above xaml renders like the following:

<img src="https://i.stack.imgur.com/8fM5O.jpg" alt="Hello World">

blocks|key|337246|text|不使用INotifyPropertyChanged或DependencyProperties的绑定|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|337247|正如前面所讨论的，你可以在没有INotifyPropertyChanged的情况下绑定一个普通的here对象属性，它将会正常工作。|337248|这里是我所指的the+Forumpost。|337249|引用：|337250|337251|+...WPF的数据绑定引擎将数据绑定到PropertyDescriptor实例，如果源对象是纯CLR对象且未实现INotifyPropertyChanged接口，则该实例包装源属性。数据绑定引擎将尝试通过PropertyDescriptor.AddValueChanged()方法订阅属性更改事件。当目标数据绑定元素更改属性值时，数据绑定引擎将调用PropertyDescriptor.SetValue()方法将更改后的值传回源属性，并同时引发ValueChanged事件通知其他订阅者(在这种情况下，其他订阅者将是ListBox中的TextBlocks+)。|blockquote|337252|337253|如果您正在实现INotifyPropertyChanged，则完全负责在需要绑定到UI的数据的属性的每个设置器中实现更改通知。否则，更改将不会像您预期的那样同步...|337254|337255|这是关于这个主题的另一个great+and+detailed+article。|337256|337257|注意：只有在使用binding时才有效。如果您从代码更新值，更改将不会收到通知。..。|337258|337259|实现INotifyPropertyChanged可能是相当繁琐的开发工作。但是，您需要根据WPF应用程序运行时内存占用(内存和CPU)来权衡工作。自己实现INPC将节省运行时CPU和内存。|337260|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/7767218/why-does-the-binding-update-without-implementing-inotifypropertychanged|1|http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/9365bb6a-b411-4967-9a03-ae2a810fb215/|2|http://10rem.net/blog/2010/12/17/puff-the-magic-poco-binding-and-inotifypropertychanged-in-wpf^0|1B|2|0|0|1T|1C|4|0|0|0|L|7|D|1|0|0|3|0|0|0|7T|0|0|0|2B|0|0|0|13|C|Q|2|0|0|0|Q|T|E|0|0|0|2M|0^^$0|@$1|2|3|4|5|6|7|1D|8|@$9|1E|A|1F|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1G|8|@$9|1H|A|1I|B|C]]|D|@$9|1J|A|1K|1|1L]]|E|$]]|$1|H|3|I|5|6|7|1M|8|@$9|1N|A|1O|B|C]]|D|@$9|1P|A|1Q|1|1R]]|E|$]]|$1|J|3|K|5|6|7|1S|8|@$9|1T|A|1U|B|C]]|D|@]|E|$]]|$1|L|3|-4|5|6|7|1V|8|@]|D|@]|E|$]]|$1|M|3|N|5|O|7|1W|8|@$9|1X|A|1Y|B|C]]|D|@]|E|$]]|$1|P|3|-4|5|6|7|1Z|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|20|8|@$9|21|A|22|B|C]]|D|@]|E|$]]|$1|S|3|-4|5|6|7|23|8|@]|D|@]|E|$]]|$1|T|3|U|5|6|7|24|8|@$9|25|A|26|B|C]]|D|@$9|27|A|28|1|29]]|E|$]]|$1|V|3|-4|5|6|7|2A|8|@]|D|@]|E|$]]|$1|W|3|X|5|O|7|2B|8|@$9|2C|A|2D|B|C]|$9|2E|A|2F|B|C]]|D|@]|E|$]]|$1|Y|3|-4|5|6|7|2G|8|@]|D|@]|E|$]]|$1|Z|3|10|5|6|7|2H|8|@$9|2I|A|2J|B|C]]|D|@]|E|$]]|$1|11|3|-4|5|6|7|2K|8|@]|D|@]|E|$]]]|12|$13|$5|14|15|16|E|$17|18]]|19|$5|14|15|16|E|$17|1A]]|1B|$5|14|15|16|E|$17|1C]]]]

Binding without INotifyPropertyChanged or DependencyProperties
As discussed <a href="https://stackoverflow.com/questions/7767218/why-does-the-binding-update-without-implementing-inotifypropertychanged">here</a> you can bind a plain CLR object property without INotifyPropertyChanged, and it will just work.
Here is <a href="http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/9365bb6a-b411-4967-9a03-ae2a810fb215/" rel="nofollow noreferrer">the Forumpost</a> i am referring to.
Quote:
<blockquote>
[...] WPF's data binding engine will data bind to PropertyDescriptor instance which wraps the source property if the source object is a plain CLR object and doesn't implement INotifyPropertyChanged interface. And the data binding engine will try to subscribe to the property changed event through PropertyDescriptor.AddValueChanged() method. And when the target data bound element change the property values, data binding engine will call PropertyDescriptor.SetValue() method to transfer the changed value back to the source property, and it will simultaneously raise ValueChanged event to notify other subscribers (in this instance, the other subscribers will be the TextBlocks within the ListBox.
And if you are implementing INotifyPropertyChanged, you are fully responsible to implement the change notification in every setter of the properties which needs to be data bound to the UI. Otherwise, the change will be not synchronized as you'd expect.[...]
</blockquote>
Here is another <a href="http://10rem.net/blog/2010/12/17/puff-the-magic-poco-binding-and-inotifypropertychanged-in-wpf" rel="nofollow noreferrer">great and detailed article</a> on the subject.
<blockquote>
Note this only works when using binding. If you update the values from code, the change won't be notified. [...]
Implementing INotifyPropertyChanged can be a fair bit of tedious development work. However, you'll need to weigh that work against the runtime footprint (memory and CPU) of your WPF application. Implementing INPC yourself will save runtime CPU and memory.
</blockquote>

Here is a large number of hidden features discussed for variety of languages. Now I am curious about some hidden features of XAML and WPF? 

One I have found is the header click event of a ListView

<pre><code>&lt;ListView x:Name='lv' 
 Height="150" 
 GridViewColumnHeader.Click="GridViewColumnHeaderClickedHandler"&gt;
</code></pre>

The GridViewColumnHeader.Click property is not listed.

Some of relevant features so far:

<ul>
<li><a href="https://stackoverflow.com/questions/1124769/hidden-features-of-wpf-and-xaml/1125555#1125555">Multibinding combined with StringFormat</a></li>
<li><a href="https://stackoverflow.com/questions/1124769/hidden-features-of-wpf-and-xaml/1125815#1125815">TargetNullValue to bindings</a></li>
<li><a href="https://stackoverflow.com/questions/1124769/hidden-features-of-wpf-and-xaml/1389166#1389166">TextTrimming property</a></li>
<li><a href="https://stackoverflow.com/questions/1124769/hidden-features-of-wpf-and-xaml/1322077#1322077">Markup extensions</a> </li>
<li><a href="https://stackoverflow.com/questions/1124769/hidden-features-of-wpf-and-xaml/1322340#1322340">Adding Aero effect to Window</a></li>
<li><a href="https://stackoverflow.com/questions/1124769/hidden-features-of-wpf-and-xaml/1164548#1164548">Advanced "caption" properties</a></li>
<li><a href="https://stackoverflow.com/questions/1124769/hidden-features-of-wpf-and-xaml/1405000#1405000">XAML Converters</a></li>
</ul>

See also:

<ol>
<li><a href="https://stackoverflow.com/questions/9033/hidden-features-of-c">Hidden features of C#</a></li>
<li><a href="https://stackoverflow.com/questions/101268/hidden-features-of-python">Hidden features of Python</a></li>
<li><a href="https://stackoverflow.com/questions/54929/hidden-features-of-asp-net">Hidden features of ASP.NET</a></li>
<li><a href="https://stackoverflow.com/questions/161872/hidden-features-of-perl">Hidden features of Perl</a></li>
<li><a href="https://stackoverflow.com/questions/15496/hidden-features-of-java">Hidden features of Java</a></li>
<li><a href="https://stackoverflow.com/questions/102084/hidden-features-of-vb-net">Hidden features of VB.NET</a></li>
<li><a href="https://stackoverflow.com/questions/61401/hidden-features-of-php">Hidden features of PHP</a></li>
<li><a href="https://stackoverflow.com/questions/63998/hidden-features-of-ruby">Hidden features of Ruby</a></li>
<li><a href="https://stackoverflow.com/questions/132241/hidden-features-of-c">Hidden features of C</a></li>
<li><a href="https://stackoverflow.com/questions/tagged/hidden-features">And So On........</a></li>
</ol>

Hidden features of WPF and XAML?

Windows

下面是针对各种语言讨论的大量隐藏功能。现在我对XAML和WPF的一些隐藏特性感到好奇。我发现的一个例子是ListView的标题单击事件<ListView x:Name='lv' Height="150" GridViewColumnHeader.Click="GridViewColumnHead...

问WPF和XAML的隐藏功能？
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问WPF和XAML的隐藏功能？EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问WPF和XAML的隐藏功能？
EN