Hi,

I am trying to add a datum to a dimension. In the UI I would do this by just selecting the dimension and adding a Datum object. The datum automatically snaps to the dimension as shown in the image attached (datumDimensionSnap.jpeg).

When I try to do the same thing using the API, the datum snaps to 0,0 and fails to move.

Here is the method I am using. All its doing is getting a displayDimension's location and adding the datum to it at a location offset by 0.1 on the Y. Assume this is being added for vertical dimension.

public static bool AddDatumToDimension(DisplayDimension dispDim, String datumTag, ModelDoc2 swModel, string viewName)

        {

            SolidWorks.Interop.sldworks.Dimension dim = dispDim.GetDimension();

            Annotation dispannotation = dispDim.GetAnnotation();

            double[] loc = dispannotation.GetPosition();

            string dimId = dim.FullName;

            bool status = swModel.Extension.SelectByID2(dimId, MCADConstants.DIMENSION, 0, 0, 0, false, 0, null, 0);

            if (!status)

            {

                return false;

            }

            else

            {              

                DatumTag myDatumTag = null;

                if (status)

                {

                    Annotation myAnnotation = null;

                    myDatumTag = ((DatumTag)(swModel.InsertDatumTag2()));

                    if ((myDatumTag != null))

                    {

                        myDatumTag.FilledTriangle = true;

                        myDatumTag.Shoulder = false;

                        bool boolstatus = myDatumTag.SetLabel(datumTag);

                        myAnnotation = ((Annotation)(myDatumTag.GetAnnotation()));

                        swModel.ClearSelection2(true);

                        status = myAnnotation.SetPosition(loc[0], loc[1]+0.1, loc[2]);

                        swModel.ClearSelection2(true);

                    }

                }

                return status;

            }

        }

Please advise. Is there any other way to attach a datum to the dimension?

Thanks,

Herhs