WPF - Getting a property value from a binding path
I found a way to do this, but it's quite ugly and probably not very fast... Basically, the idea is to create a binding with the given path and apply it to a property of a dependency object. That way, the binding does all the work of retrieving the value:
public static class PropertyPathHelper{ public static object GetValue(object obj, string propertyPath) { Binding binding = new Binding(propertyPath); binding.Mode = BindingMode.OneTime; binding.Source = obj; BindingOperations.SetBinding(_dummy, Dummy.ValueProperty, binding); return _dummy.GetValue(Dummy.ValueProperty); } private static readonly Dummy _dummy = new Dummy(); private class Dummy : DependencyObject { public static readonly DependencyProperty ValueProperty = DependencyProperty.Register("Value", typeof(object), typeof(Dummy), new UIPropertyMetadata(null)); }}
I developed a nuget package Pather.CSharp that does exactly what you need.
It contains a class Resolver
that has a Resolve
method which behaves like @ThomasLevesque's GetValue
method.
Example:
IResolver resolver = new Resolver(); var o = new { Property1 = Property2 = "value" } }; var path = "Property1.Property2"; object result = r.Resolve(o, path); //the result is the string "value"
It even supports collection access via index or dictionary access via key.
Example paths for these are:
"ArrayProperty[5]""DictionaryProperty[Key]"
not sure what you want to do but and how (xaml or code) yet you can always name your object
<MyObject x:Name="myBindingObject" ... />
an then use it in code
myBindingObject.Something.Name
or in xaml
<BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetName="myBindingObject" Storyboard.TargetProperty="Background" To="AA2343434" Duration="0:0:2" > </DoubleAnimation> </Storyboard></BeginStoryboard>