小编use*_*456的帖子

我是WPF的新手,我尝试创建xaml逻辑,以根据ViewModel上的AllowMiscTitle的值显示/隐藏控件.XAML中包含两个领域的标准砖的组合框("先生","太太",...,"其他")时,"其他"选择我想要的文本框来显示.

我创建了以下xaml:

                <DockPanel Validation.Error="Validation_Error" HorizontalAlignment="Stretch">
                <ComboBox ItemsSource="{Binding Path=Titles, Mode=OneTime}" 
                      Text="{Binding Path=Title}"/>
                <TextBox x:Name="TxtBxTitle" Margin="5,5" Visibility="Visible">
                    <TextBox.Style>
                        <Style>
                            <Style.Triggers>
                                <DataTrigger Binding="{Binding Path=AllowMiscTitle}" Value="false">
                                    <Setter Property="TextBox.Visibility" Value="Hidden"/>
                                </DataTrigger>
                            </Style.Triggers>
                        </Style>
                    </TextBox.Style>
                </TextBox>

            </DockPanel>

我正在尝试将我的WPF窗口的背景设置为图像,但是当我尝试运行它时,我得到了这个异常:

A first chance exception of type 'System.Windows.Markup.XamlParseException' occurred in PresentationFramework.dll Additional information: 'Provide value on 'System.Windows.Baml2006.TypeConverterMarkupExtension' threw an exception.' Line number '8' and line position '10'.

我不想将图像添加到项目中,因为我希望能够在运行时更改图像.我的目的是使用数据绑定在启动过程中设置背景图片.

源代码:

<Window x:Class="ColinsTest.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Colin's Test Application" 
    WindowStyle="None"
    WindowState="Maximized">
<Window.Background>
    <ImageBrush 
        ImageSource="DeLaRue-Background.jpg"/>
</Window.Background>
<Grid></Grid>
</Window>

有任何想法吗？谢谢