Is it possible to set a default image for WPF's Image-Control?
<Image Source={Binding Path=ImageUrl, IsAsync=True}" />
Eg. if ImageUrl causes a HTTP 404 response, I would like to have a default/placeholder image to be displayed.
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1Check this:http://stackoverflow.com/a/19027808/ – Bolu Apr 14 '15 at 15:31
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My apologies. I misunderstood. – Joshua Apr 14 '15 at 15:39
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Just set a FallbackValue – Chris W. Apr 14 '15 at 19:07
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@ChrisW. FallbackValue won't help, because the binding produces a valid value (an image URI). It's the subsequent built-in conversion from string to ImageSource that fails. – Clemens Apr 14 '15 at 21:02
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As an alternative to the solution linked in the comment by Bolu, you may implement a binding converter that performs the download and handles possible errors. – Clemens Apr 14 '15 at 21:04
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the image will be inside a ItemsControl or alone? depending the case I can give you an answer – Juan Pablo Garcia Coello Apr 15 '15 at 05:06
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@Clemens: that was my first thought also. But how do I Implement the async handling (IsAsync=true)? – zpete Apr 19 '15 at 11:56
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@JuanPabloGarciaCoello: its used alone, not within an ItemsControl. – zpete Apr 19 '15 at 11:57
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@user1130329 That would be difficult, because the converter is always called synchronously (i.e. in the UI thread). I'd suggest to add an ImageFailed handler. – Clemens Apr 19 '15 at 17:48