How can I set the WPF BitmapImage UriSource property to a relative path?

问题

I'm loading an image in WPF by using the BitmapImage class. My code works perfectly when I give an absolute path for the UriSource but not when I try and use a relative path.

My XAML is:

<Image Width="50" Name="MemberImage" HorizontalAlignment="Left">
    <Image.Source>
        <BitmapImage DecodePixelWidth="50" UriSource="questionmark.jpg" />
    </Image.Source>
</Image>

The questionmark.jpg is added to the project with a Build Action of Resource and Copy to Output Directory set to Copy always. The error I get is "The file [file name] is not part of the project or its 'Build Action' property is not set to 'Resource'". This works when I use an absolute path for the UriSource but that obviously won't do.

How should I be defining my UriSource in the XAML?

回答1:

I don't think you need to copy the image to output directory once it's in resource.

Correct way to specify is

<BitmapImage 
    x:Key  = "Logo"
 UriSource = "pack://application:,,,/ApplicationNamespace;component/Images/App/image.png"  
/>

Just replace

ApplicationNamespace with your application namespace

and

Images/App/image.png with your image path in the project

回答2:

Image files with the following options in properties
Build Action=Content
Copy to Output Directory=Copy if newer

<BitmapImage x:Key="QuestionMark" UriSource="pack://siteoforigin:,,,/questionmark.png"/>

Reference:
Xaml - Bitmap UriSource - absolute path works, relative path does not, why?

回答3:

I cannot reproduce the problem on my computer:

I add the jpg by choosing Add existing item in the Project menu
I then set its Build Actio to Resource and Copy to Output directory to always.
My XAML is the same.

Works perfectly here, even after moving the .exe and renaming the jpg. Something else must be biting you!

来源：https://stackoverflow.com/questions/3180427/how-can-i-set-the-wpf-bitmapimage-urisource-property-to-a-relative-path

标签

wpf

uri

bitmapimage