Smrf.NodeXL.ExcelTemplate.VertexWorksheetReader.ReadPolarCoordinates C# (CSharp) Method

    ReadPolarCoordinates
    (
        ExcelTableReader.ExcelTableRow oRow,
        IVertex oVertex
    )
    {
        Debug.Assert(oRow != null);
        Debug.Assert(oVertex != null);
        AssertValid();

        String sR;

        Boolean bHasR = oRow.TryGetNonEmptyStringFromCell(
            VertexTableColumnNames.PolarR, out sR);

        String sAngle;

        Boolean bHasAngle = oRow.TryGetNonEmptyStringFromCell(
            VertexTableColumnNames.PolarAngle, out sAngle);

        if (bHasR != bHasAngle)
        {
            // R or Angle alone won't do.

            goto Error;
        }

        if (!bHasR && !bHasAngle)
        {
            return (false);
        }

        Single fR, fAngle;

        if ( !Single.TryParse(sR, out fR) ||
            !Single.TryParse(sAngle, out fAngle) )
        {
            goto Error;
        }

        oVertex.SetValue(ReservedMetadataKeys.PolarLayoutCoordinates,
            new SinglePolarCoordinates(fR, fAngle) );

        return (true);

        Error:

            Range oInvalidCell = oRow.GetRangeForCell(
                VertexTableColumnNames.PolarR);

            OnWorkbookFormatError( String.Format(

                "There is a problem with the vertex polar coordinates at {0}."
                + " If you enter polar coordinates, they must include both"
                + " {1} and {2} numbers.  Any numbers are acceptable."
                + "\r\n\r\n"
                + "Polar coordinates are used only when a Layout of Polar"
                + " or Polar Absolute is selected in the graph pane."
                ,
                ExcelUtil.GetRangeAddress(oInvalidCell),
                VertexTableColumnNames.PolarR,
                VertexTableColumnNames.PolarAngle
                ),

                oInvalidCell
                );

            // Make the compiler happy.

            return (false);
    }