将图像源路径绑定到 WPF 中的相对路径时，是否可以在应用程序目录之外设置基本路径？

发布于 2024-08-28 08:30:10 字数 311 浏览 4 评论 0原文

所以我试图显示一个在我的应用程序路径之外的图像。我只有一个相对图像路径，例如“images/background.png”，但我的图像位于其他位置，我可能想在运行时选择该基本位置，以便绑定映射到正确的文件夹。例如“e:\data\images\background.png”或“e:\data\theme\images\background.png”

<Image Source="{Binding Path=ImagePathWithRelativePath}"/>

有没有办法在 XAML 或代码后面指定这些图像的基本目录？

原文

So I'm trying to display an image that is ouside the path of my application. I only have a relative image path such as "images/background.png" but my images are somewhere else, I might want to choose that base location at runtime so that the binding maps to the proper folder. Such as "e:\data\images\background.png" or "e:\data\theme\images\background.png"

<Image Source="{Binding Path=ImagePathWithRelativePath}"/>

Is there any way to specify either in XAML or code behind a base directory for those images?

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死开点丶别碍眼 2024-09-04 08:30:10

在代码后面声明一个静态字段 BasePath

class Utility
{
    public static BasePath;
}

为其指定要用作基本路径的路径

声明一个转换器，如下所示：

public class RelativePathToAbsolutePathConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        //conbine the value with base path and return
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        // return whatever you want
    }
}

更新您的绑定以使用转换器

<Window.Resources>
<local:RelativePathToAbsolutePathConverter x:Key="RelativePathToAbsolutePathConverter"/>
</Window.Resources>

<Image Source="{Binding Path=ImagePathWithRelativePath, Converter={StaticResource RelativePathToAbsolutePathConverter}}"/>

Declare a static field say BasePath in code behind

class Utility
{
    public static BasePath;
}

assign it the path that you want to use as base path

declare a converter like this:

public class RelativePathToAbsolutePathConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        //conbine the value with base path and return
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        // return whatever you want
    }
}

Update your binding to use a converter

<Window.Resources>
<local:RelativePathToAbsolutePathConverter x:Key="RelativePathToAbsolutePathConverter"/>
</Window.Resources>

<Image Source="{Binding Path=ImagePathWithRelativePath, Converter={StaticResource RelativePathToAbsolutePathConverter}}"/>

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