WPF Binding Return StaticResource as String - wpf

Question

I created a custom checkbox using a UserControl with Image and Label inside. I want to swap the Checked and Unchecked images whenever i click it.
So far i tried doing the following
<Image Source="{Binding StateImage}"/>
I have a property named StateImage
public String StateImage
{
get
{
return is_checked?"{StaticResource Checked}":"StaticResource Unchecked";
}
}
My code doesn't work and i ended up doing like this:
public String StateImage
{
get
{
return is_checked?"/Resources/Images/Checked.png":"/Resources/Images/Unchecked.png";
}
}
the is_checked variable is modified under MouseDown Event of the UserControl
Is there an easier way I can call the image without writing the whole path and filename?

Answer 1

You could define the resources as strings in the UserControl:
<UserControl x:Class="WpfApplication1.UserControl1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300"
xmlns:s="clr-namespace:System;assembly=mscorlib">
<UserControl.Resources>
<s:String x:Key="Checked">pic.png</s:String>
<s:String x:Key="UnChecked"></s:String>
</UserControl.Resources>
<Grid Background="Yellow">
<Image Source="{Binding StateImage}"/>
</Grid>
</UserControl>
private bool is_checked;
public String StateImage
{
get
{
return is_checked ? Resources["Checked"] as string : Resources["UnChecked"] as string;
}
}