Question

我正在尝试实施此处列出的示例：

http://www.codeproject.com/Articles/30994/Introduction-to-WPF-Templates

作者声明“ContentPresenter控件可用于显示WPF控件的内容。”

使用以下代码：

<ContentPresenter VerticalAlignment="Center" HorizontalAlignment="Center" 
Content="{TemplateBinding Button.Content}" />

我已将它添加到我的窗口中，如下所示：

<Window x:Class="HKC.Desktop.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="487" Width="765.924" Loaded="Window_Loaded">

    <Grid x:Name="mainGrid" Background="#FF252525">
        <Button Content="Push Me" Template="{StaticResource buttonTemplate}" Name="button1" Height="100" Width="100"></Button>

        <ContentPresenter VerticalAlignment="Center" HorizontalAlignment="Center"  Content="{TemplateBinding Button.Content}" />
    </Grid>


</Window>

但我收到以下错误：

Cannot set a TemplateBinding if not in a template.

我该如何解决这个问题？

Answer 1

您需要将ContentPresent放在ControlTemplate中，就像那样

<ControlTemplate x:Key="buttonTemplate" TargetType="{x:Type Button}">
            <Grid>
                <Ellipse Name="el1" Fill="Orange" Width="100" Height="100">
                </Ellipse>
                <ContentPresenter VerticalAlignment="Center" HorizontalAlignment="Center" 
                        Content="{TemplateBinding Button.Content}" />
            </Grid>
</ControlTemplate>

Answer 2

问题是你没有模板。你的XAML看起来应该是这样的：

<Window x:Class="HKC.Desktop.Window1" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Title="Window1" Height="487" Width="765.924" Loaded="Window_Loaded">
    <Window.Resources>
        <ControlTemplate x:Key="buttonTemplate" TargetType="{x:Type Button}">      
            <Ellipse Name="el1" Fill="Orange" Width="100" Height="100">            
            <ContentPresenter VerticalAlignment="Center" HorizontalAlignment="Center" Content="{TemplateBinding Button.Content}" /> 
        </ControlTemplate>
    </Window.Resources> 

    <Grid x:Name="mainGrid" Background="#FF252525"> 
        <Button Content="Push Me" Template="{StaticResource buttonTemplate}" Name="button1" Height="100" Width="100"/>  
    </Grid> 
</Window>

如何设置TemplateBinding以解决WPF错误“如果不在模板中，则无法设置TemplateBinding。”？

2 个答案: