Guid as PortKey Type doesn't work

GoXam
1

I am trying to run the sample code(Logic Circuit example) with Guid as the PortKey.
Eg. <span =“apple-style-span”="" style=“font-family: Consolas; font-size: 13px; line-height: 18px; white-space: pre; : rgb255, 255, 255; “> var<span =“apple-style-span”=”” style=“font-family: Consolas; font-size: 13px; line-height: 18px; white-space: pre; : rgb255, 255, 255; “> model = new<span =“apple-style-span”=”” style=“font-family: Consolas; font-size: 13px; line-height: 18px; white-space: pre; : rgb255, 255, 255; “> GraphLinksModel<span =“apple-style-span”=”” style=“font-family: Consolas; font-size: 13px; line-height: 18px; white-space: pre; : rgb255, 255, 255; “><GateData<span =“apple-style-span”=”” style=“font-family: Consolas; font-size: 13px; line-height: 18px; white-space: pre; : rgb255, 255, 255; “>, String<span =“apple-style-span”=”” style=“font-family: Consolas; font-size: 13px; line-height: 18px; white-space: pre; : rgb255, 255, 255; “>, Guid<span =“apple-style-span”=”” style=“font-family: Consolas; font-size: 13px; line-height: 18px; white-space: pre; : rgb255, 255, 255; “>, WireData<span =“apple-style-span”=”” style=“font-family: Consolas; font-size: 13px; line-height: 18px; white-space: pre; : rgb255, 255, 255; “>>();

It throws an exception “Specific Cast is not valid” while loading the diagram.
Stack Trace:
<font =“apple-style-span”=”” face=“Consolas” size=“3”><span =“apple-style-span”="" style=“line-height: 18px; “>   at Northwoods.GoXam.Model.GraphLinksModel`4.#Ym(Object fromdata, Object fromparam, Object todata, Object toparam)

at Northwoods.GoXam.PartManager.#xl(IDiagramModel model, Link link)

at Northwoods.GoXam.PartManager.AddLinkForData(Object linkdata, IDiagramModel model)

at Northwoods.GoXam.PartManager.DoRebuildLinkElements()

at Northwoods.GoXam.PartManager.RebuildLinkElements()

at Northwoods.GoXam.PartManager.RebuildNodeElements()

at Northwoods.GoXam.Diagram.#hc()

at Northwoods.GoXam.Diagram.OnApplyTemplate()

at System.Windows.FrameworkElement.ApplyTemplate()

at System.Windows.FrameworkElement.MeasureCore(Size availableSize)

at System.Windows.UIElement.Measure(Size availableSize)

at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
<font =“apple-style-span”=”” face=“Consolas” size=“3”><span =“apple-style-span”="" style=“line-height: 18px; “>


Some findings are that 
1.The DP PortId in GoXam.Node is of type “String” as shown,
public static string GetPortId(DependencyObject d);
public static void SetPortId(DependencyObject d, string v);
2. Also, i tried to override 2 functions in the LinkType Class i.e. class WireData : GraphLinksModelLinkData<String, Guid>
protected override string ConvertPortKeyToString(Guid key){ return key.ToString(); }
protected override Guid ConvertStringToPortKey(string s) { return Guid.Parse(s); }
But it breaks before the above method is even executed.
Can i get some help?
Anyone tried using a GraphLinkModel with PortKey other than a String?
<font =“apple-style-span”=”” face=“Consolas” size=“3”><span =“apple-style-span”="" style="line-height: 18px; ">
2

Yes, Diagram and PartManager assume that the PortKey is a string.
However, GraphLinksModel allows type parameterization of the PortKey, which offers flexibility that the Diagram/PartManager cannot use.
It’s possible that some day we could extend the functionality of Diagram/PartManager to work with all kinds of port parameter types, but that won’t happen for version 1.3.

So the easiest solution is to use String as the PortKey type.

Those two conversion methods on GraphLinksModelLinkData are just used for reading/writing XElement data; they are not used by the Diagram/PartManager.