原文:WPF 动态添加控件以及样式字典的引用(Style introduction)
我们想要达到的结果是，绑定多个Checkbox然后我们还可以获取它是否被选中，其实很简单，我们只要找到那几个关键的对象就可以了。
下面是Ui,其中定义了一个WrapPanel来存放CheckBox，还有两个按钮，用于测试相关功能。
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApplication1"
mc:Ignorable="d"
Title="MainWindow" Height="" Width="">
<Grid Name="div" >
<StackPanel Margin="0,50,0,0" Orientation="Horizontal" HorizontalAlignment="Center">
<StackPanel>
<Button Content="动态添加多个checkbox控件" Height="" Padding="15,1,15,2" x:Name="btnAdd" Click="btnAdd_Click"></Button>
</StackPanel> </StackPanel> <ScrollViewer ScrollViewer.VerticalScrollBarVisibility="Auto" Height="">
<Border BorderBrush="#797979" BorderThickness="" Margin="5,0,5,5">
<WrapPanel x:Name="addCheckbox"/>
</Border>
</ScrollViewer>
<Button x:Name="button" Content="Button" HorizontalAlignment="Left" Margin="37,261,0,0" VerticalAlignment="Top" Width="" Click="button_Click"/>
<Button x:Name="button1" Content="Button" HorizontalAlignment="Left" Margin="379,50,0,0" VerticalAlignment="Top" Width="" Click="button1_Click"/>
</Grid>
</Window>
在动态添加Checkbox中我们定义了一个CheckBox数组，此后又实例化了ThickNess对象，它是用于描述矩形周围的粗细，然后我们又循环了数组的长度来进行添加（对其中name为addCheckbox的控件），至此，checkbox已动态添加。
那如何删除呢？我们依旧需要获取那个名为addCheckbox的控件的儿子们（Children）来进行remove。请看以下代码片段。
private void button1_Click(object sender, RoutedEventArgs e)
{
for (int i = ; i < addCheckbox.Children.Count;)
{
this.addCheckbox.Children.Remove(addCheckbox.Children[i]);
}
}
循环其中的值也是非常的简单，因为我们在上面绑定的时候，已经给它的Content或者是DataContext都赋值了，所以我们只要获取就ok了。
private void button_Click(object sender, RoutedEventArgs e)
{
foreach (UIElement item in addCheckbox.Children)
{
if (item is CheckBox)
{
CheckBox checkbox = (item as CheckBox);
if (checkbox.IsChecked == true)
{
MessageBox.Show(checkbox.Content.ToString());
}
}
}
}
最后生成出来的效果是这样的,是不是非常丑，那我教你如何进行简单的美化。
在我们添加checkbox的时候有两种引入方式，一种是 checkbox.Style = Resources["NoticeBox"] as Style; 另一种的话是 Style style = (Style)this.FindResource("NoticeButton"); 那两者有什么区别呢？
第一个是必须将资源文件引用到当前页面，第二种的是在App.xaml进行查找不包括app.xaml中引入的(外部的资源文件)。下面我们写一个CheckBox样式在app,xaml中。
<Application x:Class="WpfApplication1.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication1"
StartupUri="MainWindow.xaml"> <Application.Resources>
<Style x:Key="CheckBoxSwitchStyle" TargetType="CheckBox">
<Setter Property="IsChecked" Value="False"/>
<Setter Property="Cursor" Value="Hand"/>
<Setter Property="FontFamily" Value="/MESToolIntegration;component/Fonts/#iconfont"/>
<Setter Property="Background" Value="#FFFFFF"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="CheckBox">
<Border Width="" Name="CheckTrueBG" Height="" BorderThickness="" Background="#FFFFFF" CornerRadius="" BorderBrush="#ACACAC" >
<Grid>
<Border BorderThickness="" Background="#ACACAC" x:Name="border" Width="" Height="" CornerRadius="" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="" >
<Border.RenderTransform>
<TranslateTransform X=""/>
</Border.RenderTransform>
</Border>
<TextBlock x:Name="txt" Text="{TemplateBinding Content}" FontFamily="iconfont" FontSize="{TemplateBinding FontSize}" Margin="6.996,2.798,0,2.798" VerticalAlignment="Stretch" Foreground="#ACACAC" HorizontalAlignment="Left" >
<TextBlock.RenderTransform>
<TranslateTransform X=""></TranslateTransform>
</TextBlock.RenderTransform>
</TextBlock>
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="true">
<Setter Property="Background" TargetName="CheckTrueBG" Value="#5FB878"/>
<Setter Property="Foreground" TargetName="txt" Value="#FFFFFF"/>
<Setter Property="Background" TargetName="border" Value="#FFFFFF"/>
<Setter Property="Text" TargetName="txt" Value="{Binding Tag,RelativeSource={RelativeSource TemplatedParent}}"/>
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.X)" To="" Duration="00:00:0.2"/>
<DoubleAnimation Storyboard.TargetName="txt" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.X)" To="" Duration="00:00:0.2"/>
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.X)" To="" Duration="00:00:0.2"/>
<DoubleAnimation Storyboard.TargetName="txt" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.X)" To="" Duration="00:00:0.2"/>
</Storyboard>
</BeginStoryboard>
</Trigger.ExitActions>
</Trigger>
<Trigger Property="IsChecked" Value="False">
<Setter Property="Text" TargetName="txt" Value="{Binding Content,RelativeSource={RelativeSource TemplatedParent}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Application.Resources>
</Application>
就这样我们在生成CheckBox中进行配置，代码如下。
private void btnAdd_Click(object sender, RoutedEventArgs e)
{
int num = ;
CheckBox[] check = new CheckBox[num];
Thickness th = new Thickness();
th.Bottom = ;
th.Left = ;
th.Right = ;
th.Top = ;
for (int i = ; i < check.Length; i++)
{
check[i] = new CheckBox();
//设置checkbox属性
check[i].Margin = th;
check[i].Content = i + ;
check[i].Name = "heheda";
check[i].DataContext = "asdas";
check[i].Style = (Style)this.FindResource("CheckBoxSwitchStyle");
this.addCheckbox.Children.Add(check[i]);
}
}
启动页面我们可以发现引入成功了。
不难发现，看一下代码，我们如何还想写别的样式，这个时候应该怎么办？难道还要往app.xaml里写？这就非常恶心了，所以我们采用引入的方式，这和css有点像！新建一个资源字典。
在其中写入写入以下样式。
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication1">
<Style x:Key="BtnInfoStyle" TargetType="Button">
<Setter Property="Width" Value=""/>
<Setter Property="Height" Value=""/>
<Setter Property="Foreground" Value="White"/>
<Setter Property="BorderThickness" Value=""/>
<Setter Property="Background" Value="#43a9c7"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border x:Name="border" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" SnapsToDevicePixels="True">
<TextBlock Text="{TemplateBinding Content}" Foreground="{TemplateBinding Foreground}" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="border" Property="Background" Value="#2f96b4"/>
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter TargetName="border" Property="Background" Value="#2a89a4"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
然后在app.xaml中进行引用，这里需要注意是，有可能我们的style和外部字典都放进去了，它们的关系是style其实也是一个字典，然后就变成了这样。
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Dictionary1.xaml"/>
</ResourceDictionary.MergedDictionaries>
<Style x:Key="CheckBoxSwitchStyle" TargetType="CheckBox">
<Setter Property="IsChecked" Value="False"/>
<Setter Property="Cursor" Value="Hand"/>
<Setter Property="FontFamily" Value="/MESToolIntegration;component/Fonts/#iconfont"/>
<Setter Property="Background" Value="#FFFFFF"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="CheckBox">
<Border Width="" Name="CheckTrueBG" Height="" BorderThickness="" Background="#FFFFFF" CornerRadius="" BorderBrush="#ACACAC" >
<Grid>
<Border BorderThickness="" Background="#ACACAC" x:Name="border" Width="" Height="" CornerRadius="" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="" >
<Border.RenderTransform>
<TranslateTransform X=""/>
</Border.RenderTransform>
</Border>
<TextBlock x:Name="txt" Text="{TemplateBinding Content}" FontFamily="iconfont" FontSize="{TemplateBinding FontSize}" Margin="6.996,2.798,0,2.798" VerticalAlignment="Stretch" Foreground="#ACACAC" HorizontalAlignment="Left" >
<TextBlock.RenderTransform>
<TranslateTransform X=""></TranslateTransform>
</TextBlock.RenderTransform>
</TextBlock>
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="true">
<Setter Property="Background" TargetName="CheckTrueBG" Value="#5FB878"/>
<Setter Property="Foreground" TargetName="txt" Value="#FFFFFF"/>
<Setter Property="Background" TargetName="border" Value="#FFFFFF"/>
<Setter Property="Text" TargetName="txt" Value="{Binding Tag,RelativeSource={RelativeSource TemplatedParent}}"/>
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.X)" To="" Duration="00:00:0.2"/>
<DoubleAnimation Storyboard.TargetName="txt" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.X)" To="" Duration="00:00:0.2"/>
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.X)" To="" Duration="00:00:0.2"/>
<DoubleAnimation Storyboard.TargetName="txt" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.X)" To="" Duration="00:00:0.2"/>
</Storyboard>
</BeginStoryboard>
</Trigger.ExitActions>
</Trigger>
<Trigger Property="IsChecked" Value="False">
<Setter Property="Text" TargetName="txt" Value="{Binding Content,RelativeSource={RelativeSource TemplatedParent}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
</Application.Resources>
我把缩进的截图发上来，更直观。
在其中还有内嵌的样式，可以这么写，如果是page的话你就 <Page.Resources> ，如果是windows的话那就Wndows，当然如果需要页面引入字典的话你可以这么做。
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Style/test.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
那么今天就这样~