- 我有一个===>
UserControl -
在该UserControl内部===>一个
ItemsControl。现在
ItemsControl根据给它的ItemsSource生成Button’s。我为那些纽扣设计了一些样式。===>按钮位于
Pages.xaml内部。===>和样式在
DataPagerResourceDictionary.xaml中。
我在Maindwindow.xaml中使用了UserControl。但我不能基于按钮内容来更改特定按钮的Background。
您可以从此处下载完整代码。
如果我不为按钮提供样式，下面的代码可以很好地工作。
for (int i = 0; i < displayPages.pageControl.Items.Count; i++)
{
var container = displayPages.pageControl.ItemContainerGenerator.ContainerFromIndex(i) as ContentPresenter;
var button = container.ContentTemplate.FindName("pageNumberButton", container) as Button;
if (button.Content == " 3 ")
{
button.Background = Brushes.Red;
}
}
我为以下代码片段中的按钮提供了样式[查看页面.xaml].
<ItemsControl.ItemTemplate>
<DataTemplate>
<Button x:Name="pageNumberButton" Style="{StaticResource TransparentButton}" Content="{Binding Path=Page_Number}"></Button>
</DataTemplate>
</ItemsControl.ItemTemplate>
或者看看下面的代码：
主窗口.xaml
<Window x:Class="StylingProblem.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525"
xmlns:Local="clr-namespace:StylingProblem">
<Grid>
<Local:Pages x:Name="displayPages"></Local:Pages>
<Button Content="Change Color Button" Height="23" HorizontalAlignment="Left" Margin="149,164,0,0" Name="button1" VerticalAlignment="Top" Width="133" Click="button1_Click" />
</Grid>
</Window>
主窗口.xaml.cs
public partial class MainWindow : Window
{
ObservableCollection<PageNumber> pageCollection = new ObservableCollection<PageNumber>();
public MainWindow()
{
InitializeComponent();
pageCollection.Add(new PageNumber(" 1 "));
pageCollection.Add(new PageNumber(" 2 "));
pageCollection.Add(new PageNumber(" 3 "));
pageCollection.Add(new PageNumber(" 4 "));
pageCollection.Add(new PageNumber(" 5 "));
pageCollection.Add(new PageNumber(" 6 "));
this.DataContext = this;
}
public ObservableCollection<PageNumber> PageCollection
{
get
{
return this.pageCollection;
}
set
{
this.pageCollection = value;
}
}
private void button1_Click(object sender, RoutedEventArgs e)
{
//Chage Color of Perticular button here
//Suppose say change the color of button with content == " 3 "
#region -- THIS CODE WORKS FINE IF I DON'T PROVIDE ANY STYLE TO BUTTON [see Pages.xaml] --
for (int i = 0; i < displayPages.pageControl.Items.Count; i++)
{
var container = displayPages.pageControl.ItemContainerGenerator.ContainerFromIndex(i) as ContentPresenter;
var button = container.ContentTemplate.FindName("pageNumberButton", container) as Button;
if (button.Content == " 3 ")
{
button.Background = Brushes.Red;
}
}
#endregion
}
Pages.xaml[用户控制]
<UserControl x:Class="StylingProblem.Pages"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
>
<UserControl.Resources>
<ResourceDictionary Source="DataPagerResourceDictionary.xaml"/>
</UserControl.Resources>
<Grid>
<ItemsControl Name="pageControl" ItemsSource="{Binding Path=PageCollection}">
<ItemsControl.Template>
<ControlTemplate TargetType="ItemsControl">
<Border >
<StackPanel>
<ItemsPresenter></ItemsPresenter>
</StackPanel>
</Border>
</ControlTemplate>
</ItemsControl.Template>
<ItemsControl.ItemsPanel x:Uid="pageItemTemplate">
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Button x:Name="pageNumberButton" Style="{StaticResource TransparentButton}" Content="{Binding Path=Page_Number}"></Button>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Grid>
</UserControl>
按钮样式：DataPagerResourceDictionary.xaml
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
>
<Style TargetType="Button" x:Key="TransparentButton">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border CornerRadius="2,2,2,2" HorizontalAlignment="Center" x:Name="borderTemplate" Background="Transparent">
<ContentPresenter/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter TargetName="borderTemplate" Property="Border.BorderBrush" Value="Gray" />
<Setter TargetName="borderTemplate" Property="Border.BorderThickness" Value="1" />
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter TargetName="borderTemplate" Property="Border.BorderBrush" Value="Lime" />
</Trigger>
<Trigger Property="IsFocused" Value="true">
<Setter TargetName="borderTemplate" Property="Border.Background" Value="#FD7" />
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter TargetName="borderTemplate" Property="Border.Background" Value="LightGray"></Setter>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
谢谢。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。
您在样式中覆盖了按钮的模板，因此背景颜色永远不会被使用
默认按钮模板如下所示：
<Button Background="SomeColor">
<Button.Content>
</Button>
你正在改写模板，说
<Border>
<Button.Content>
</Border>
您需要将边框的背景颜色绑定到{TemplateBinding Background}，以便它使用按钮的背景颜色。
我还建议使用DataTrigger而不是代码隐藏来更改按钮的背景色。
<Style TargetType="{x:Type Button}">
<Setter Property="Background" Value="Transparent" />
<Style.Triggers>
<DataTrigger Binding="{Binding }" Value="3">
<Setter Property="Background" Value="Red" />
</DataTrigger>
</Style.Triggers>
</Style>