public override object ProvideValue(IServiceProvider serviceProvider)
{
object returnValue = null;
try
{
IProvideValueTarget service = (IProvideValueTarget)serviceProvider.GetService(typeof(IProvideValueTarget));
Binding binding = null;
if (this.Path is string)
{
binding = new Binding {
Mode = BindingMode.OneWay
};
}
else if (this.Path is Binding)
{
binding = Path as Binding;
}
else if (this.Path is ImageSource)
{
return(this.Path);
}
else if (this.Path is System.Windows.Expression)
{
ResourceReferenceExpressionConverter cnv = new ResourceReferenceExpressionConverter();
DynamicResourceExtension mex = null;
try
{
mex = (MarkupExtension)cnv.ConvertTo(this.Path, typeof(MarkupExtension))
as DynamicResourceExtension;
}
catch (Exception) { }
if (mex != null)
{
FrameworkElement targetObject = service.TargetObject as FrameworkElement;
if (targetObject == null)
{
return(Utils.GetEmpty());
}
return(targetObject.TryFindResource(mex.ResourceKey as string));
}
}
else
{
return(Utils.GetEmpty());
}
binding.Converter = new Converter_StringToImageSource();
binding.ConverterParameter = Path is Binding ? null : Path as string;
returnValue = binding.ProvideValue(serviceProvider);
}
catch (Exception) { returnValue = Utils.GetEmpty(); }
return(returnValue);
}
static DependencyObjectExtensions()
{
ResourceReferenceExpressionConverter = new ResourceReferenceExpressionConverter();
}
