Question

I need to create and use 9-patch image ( *.9.png, like in android) in WPF-app!
Only one question – HOW?

Answer 1

WPF doesn’t support 9-patch format out of the box that I’m aware of, so you’re looking at a custom control – that said, I imagine it’d be one of the more “reasonable” controls to put together: really you’d be looking at setting up…well, to be simple, 9 different Images, each set Stretch to extents, all wrapped within a…oh, let’s pick a DockPanel for the hell of it. The control template might look something like:

(warning: slightly inebriated and free-handling this on a bloody phone, so likely not compile-able…in fact, now that I think of it, a Grid would probably be a wiser choice (3×3 rows cols, each cell with an image), but I shall persist in my original suggestion!)

<DockPanel>
    <DockPanel DockPanel.Dock="Top">
        <Image DockPanel.Dock="Left" Source="{Binding LeftTopImage}"/>
        <Image DockPanel.Dock="Right" Source="{Binding RightTopImage}"/>
        <Image Source="{Binding CenterTopImage}"/>
    </DockPanel>
    <DockPanel DockPanel.Dock="Left">
        <Image Source="{Binding CenterLeftImage}"/>
    </DockPanel>
    <DockPanel DockPanel.Dock="Right">
        <Image Source="{Binding CenterRightImage}"/>
    </DockPanel>
    <DockPanel DockPanel.Dock="Bottom">
        <Image DockPanel.Dock="Left" Source="{Binding LeftBottomImage}"/>
        <Image DockPanel.Dock="Right" Source="{Binding RightBottomImage}"/>
        <Image Source="{Binding CenterBottomImage}"/>
    </DockPanel>
    <DockPanel>
        <Image Source="{Binding CenterImage}"/>
    </DockPanel>
</DockPanel>