wpf中模板有几种，用法举例
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<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">WPF（Windows Presentation Foundation）中有三种类型的模板：控件模板（Control Templates）、数据模板（Data Templates）和项目模板（Item Templates）。下面分别介绍这三种模板的用法和举例。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1. 控件模板（Control Templates）</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">控件模板用于定义WPF控件的外观和<span style="color: black;">行径</span>，<span style="color: black;">能够</span>完全自定义控件的呈现方式。<span style="color: black;">经过</span>控件模板，<span style="color: black;">研发</span>人员<span style="color: black;">能够</span>更好地<span style="color: black;">掌控</span>控件的外观和内部结构。在XAML中定义控件模板时，<span style="color: black;">一般</span><span style="color: black;">运用</span>ControlTemplate元素来实现。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">以下是一个自定义Button控件模板的示例：</p><span style="color: black;">```xml</span><span style="color: black;"><span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">ControlTemplate</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">x:Key</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"MyButtonTemplate"</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">TargetType</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"{x:Type Button}"</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">Border</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">BorderThickness</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"1"</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">BorderBrush</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"Black"</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">Bac<span style="color: black;">公斤</span>round</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"Gray"</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">ContentPresenter</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">HorizontalAlignment</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"Center"</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">VerticalAlignment</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"Center"</span></span></span><span style="color: black;">/></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"></</span><span style="color: black;"><span style="color: black;"><span style="color: black;">Border</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;"></</span><span style="color: black;"><span style="color: black;"><span style="color: black;">ControlTemplate</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">Button</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">Template</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"{StaticResource MyButtonTemplate}"</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">Content</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"Click me!"</span></span></span><span style="color: black;">/></span></span></span><span style="color: black;">```</span>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">这个示例中，定义了一个名为"MyButtonTemplate"的控件模板，它重写Button控件的外观和<span style="color: black;">行径</span>，将它包裹在一个Border中，<span style="color: black;">而后</span>将内容<span style="color: black;">安置</span>在中心。<span style="color: black;">而后</span>，该模板被应用到一个Button上。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2. 数据模板（Data Templates）</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">数据模板用于定义<span style="color: black;">怎样</span>呈现数据对象的呈现方式。<span style="color: black;">经过</span>数据模板，<span style="color: black;">研发</span>人员<span style="color: black;">能够</span>将数据对象绑定到控件上，并定义<span style="color: black;">怎样</span>呈现数据对象的UI。在XAML中定义数据模板时，<span style="color: black;">一般</span><span style="color: black;">运用</span>DataTemplate元素来实现。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">以下是一个简单的数据模板示例：</p><span style="color: black;">```xml</span><span style="color: black;"><span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">DataTemplate</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">DataType</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"{x:Type local:Person}"</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">StackPanel</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">Orientation</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"Horizontal"</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">TextBlock</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">Text</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"{Binding FirstName}"</span></span></span><span style="color: black;">/></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">TextBlock</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">Text</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"{Binding LastName}"</span></span></span><span style="color: black;">/></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"></</span><span style="color: black;"><span style="color: black;"><span style="color: black;">StackPanel</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;"></</span><span style="color: black;"><span style="color: black;"><span style="color: black;">DataTemplate</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">ListBox</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">ItemsSource</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"{Binding People}"</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">ItemTemplate</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"{StaticResource PersonTemplate}"</span></span></span><span style="color: black;">/></span></span></span><span style="color: black;">```</span>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">这个示例中，定义了一个数据模板，它绑定到一个名为"Person"的数据对象。数据模板将数据对象的FirstName和LastName绑定到两个TextBlock上，并将它们放到一个StackPanel中。<span style="color: black;">而后</span>，该模板被应用到一个ListBox上。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">3. 项目模板（Item Templates）</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">项目模板用于定义<span style="color: black;">怎样</span>呈现控件中的<span style="color: black;">每一个</span>项。与数据模板<span style="color: black;">区别</span>，项目模板定义<span style="color: black;">怎样</span>呈现控件的<span style="color: black;">每一个</span>项，<span style="color: black;">能够</span>应用到ListView、ComboBox、DataGrid等控件上。在XAML中定义项目模板时，<span style="color: black;">一般</span><span style="color: black;">运用</span>ItemTemplate元素来实现。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">以下是一个简单的ListBox项目模板示例：</p><span style="color: black;">```xml</span><span style="color: black;"><span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">ListBox.ItemTemplate</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">DataTemplate</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">StackPanel</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">Orientation</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"Horizontal"</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">TextBlock</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">Text</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"{Binding FirstName}"</span></span></span><span style="color: black;">/></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"><</span><span style="color: black;"><span style="color: black;"><span style="color: black;">TextBlock</span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;">Text</span></span></span><span style="color: black;">=</span><span style="color: black;"><span style="color: black;"><span style="color: black;">"{Binding LastName}"</span></span></span><span style="color: black;">/></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"></</span><span style="color: black;"><span style="color: black;"><span style="color: black;">StackPanel</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"> <span style="color: black;"><span style="color: black;"></</span><span style="color: black;"><span style="color: black;"><span style="color: black;">DataTemplate</span></span></span><span style="color: black;">></span></span></span><span style="color: black;"><span style="color: black;"><span style="color: black;"></</span><span style="color: black;"><span style="color: black;"><span style="color: black;">ListBox.ItemTemplate</span></span></span><span style="color: black;">></span></span></span><span style="color: black;">```</span>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">这个示例中，定义了一个项目模板，它将ListBox中的<span style="color: black;">每一个</span>项绑定到数据对象的FirstName和LastName，并将它们放到一个StackPanel中。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">总之，控件模板、数据模板和项目模板是WPF中非常重要的模板机制，<span style="color: black;">能够</span><span style="color: black;">帮忙</span><span style="color: black;">研发</span>人员更好地<span style="color: black;">掌控</span>控件的外观和内部结构，以及数据的UI呈现方式。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">倘若</span><span style="color: black;">爱好</span>我的<span style="color: black;">文案</span>，<span style="color: black;">那样</span></span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">“<span style="color: black;">在看</span>”和<span style="color: black;">转发</span>是对我最大的支持！</span></p>
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这夸赞甜到心里，让我感觉温暖无比。
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