RhinoCommon and UserData issue

@Matti_Pirinen wrote:

Hi @dale Dale. I was able to figure it out that you are supposed to access the data with the find method like:
GeometrySegment test= list.Find(typeof(GeometrySegment)) as GeometrySegment;

Now I’m having a different problem with. When I add the customdata to my object I define some properties to the instance before adding it to the object. After I retrieve the data back All my previously defined properties are gone. Any ideas what i’m doing wrong. the code I used is below.

class:

[System.Runtime.InteropServices.Guid("D11BBCBB-37B5-4C31-BF70-97A498D12514")]
public class GeometrySegment : Rhino.DocObjects.Custom.UserData
{
    private Curve _baseCurve;
    private AreaMassProperties _areaMassProp;
    public Curve baseCurve
    {
        get
        { return _baseCurve; }
        set
        {
            _baseCurve = value;
            _areaMassProp = AreaMassProperties.Compute(value);
        }
    }
    public AreaMassProperties areaMassProp { get; set; }

    // This class information will be written to the .3dm file
    public override bool ShouldWrite
    {
        get
        {
            return true;
        }
    }

    protected override bool Read(Rhino.FileIO.BinaryArchiveReader archive)
    {
        Rhino.Collections.ArchivableDictionary dict = archive.ReadDictionary();
        _baseCurve = (Curve)dict["Curve"];
        _areaMassProp = AreaMassProperties.Compute(_baseCurve);
        return true;
    }

    protected override bool Write(Rhino.FileIO.BinaryArchiveWriter archive)
    {
        var dict = new Rhino.Collections.ArchivableDictionary(20171031, "Values");
        dict.Set("Curve", baseCurve);
        archive.WriteDictionary(dict);

        return true;
    }

Where I add the user data:

    protected override Result RunCommand(RhinoDoc doc, RunMode mode)
    {

        ObjRef sRef;
        Result r = RhinoGet.GetOneObject("Pick closed curve", false, ObjectType.Curve, out sRef);
        if (r != Result.Success) return r;

        Curve selectedCurve = sRef.Curve();

        //if the curve is not closed do nothing
        if (!selectedCurve.IsClosed)
        {
            Rhino.RhinoApp.WriteLine("The curve was not closed!!");
            return Result.Success;
        }
        List<Curve> cuttedCurves = CurveManipulation.cutCurve(selectedCurve, Plane.WorldXY, CurveManipulation.Axis.XAxis);
        drawAndSaveUserAttr(cuttedCurves, doc);
        return Result.Success;
    }

    //this method draws the curves and saves the useraddributes into them
    private void drawAndSaveUserAttr(List<Curve> cuttedCurves, RhinoDoc doc)
    {
        foreach (Curve curve in cuttedCurves)
        {
            GeometrySegment seg = new GeometrySegment();
            seg.baseCurve = curve;
            ObjectAttributes attr = new ObjectAttributes();
            attr.UserData.Add(seg);
            attr.SetUserString("Name", "Concrete");
            doc.Objects.AddCurve(curve, attr);

        }

Where I get the userdata back:

    private void button1_Click(object sender, EventArgs e)
    {
        Rhino.RhinoDoc doc = Rhino.RhinoDoc.ActiveDoc;
        RhinoObject[] objects = doc.Objects.FindByUserString("Name", "Concrete",true);

        foreach (RhinoObject o in objects)
        {
            Rhino.DocObjects.Custom.UserDataList list = o.Attributes.UserData;
            GeometrySegment joo = list.Find(typeof(GeometrySegment)) as GeometrySegment;
            if (joo.baseCurve != null)
                Rhino.RhinoApp.WriteLine(joo.baseCurve.ToString());
            else
                Rhino.RhinoApp.WriteLine("doesnt work.");

        }
    }

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