c# - Cannot get WPF attached property via Reflection -


i have custom attached property in shared lib:

public class freezable {     public static bool getisfrozen(dependencyobject obj)     {         return (bool)obj.getvalue(isfrozenproperty);     }      public static void setisfrozen(dependencyobject obj, bool value)     {         obj.setvalue(isfrozenproperty, value);     }      public static readonly dependencyproperty isfrozenproperty =         dependencyproperty.registerattached("isfrozen", typeof(bool), typeof(uielement), new uipropertymetadata(false)); }

this property tested in code , value stored.

freezable.setisfrozen(control, value); var correctvalue =freezable.getisfrozen(control);

but trying property via reflection. , have exception property cannot find (getmethod null , setmethod null)!

 public void findattachedproperty(type elementtype, string propertyname)     {         methodinfo getmethod = elementtype.getmethod("get" + propertyname, bindingflags.public | bindingflags.static);         methodinfo setmethod = elementtype.getmethod("set" + propertyname, bindingflags.public | bindingflags.static);     }

canvas.left, canvas.right working , without problems. doing wrong , why cannot attached property!?

your code works fine me. best guess when calling findattachedproperty method giving system.windows.freezable elementtype instead of own implementation library.


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