رسم DGN

رسم تنسيق DGN كجزء من DWG

Aspose.CAD لـ .NET يتيح للمطورين تصدير ملف DWG مع تضمين DGN بداخله. فيما يلي الرمز الذي يوضح كيفية الوصول إلى DGN داخل ملف DWG أثناء تصدير ملف DWG.

عينة من الكود

// The path to the documents directory.
string MyDir = RunExamples.GetDataDir_ConvertingCAD();
string[] sourceFilePaths = new[] 
{
    MyDir + "conic_pyramid.dxf",
    MyDir + "Bottom_plate.dwg"
};

foreach (var sourceFilePath in sourceFilePaths)
{
    string extension = Path.GetExtension(sourceFilePath);
    using (CadImage cadImage = (CadImage)Aspose.CAD.Image.Load(sourceFilePath))
    {
        List<string> layouts = GetNotEmptyLayouts(cadImage, extension);
        const double Epsilon = 0.00001;
        foreach (string layout in layouts)
        {
            System.Console.WriteLine("Layout= " + layout);
            using (FileStream fs = new FileStream(MyDir + "layout_" + extension + "_" + layout + ".jpg", FileMode.Create))
            {
                JpegOptions jpegOptions = new JpegOptions();
                CadRasterizationOptions options = new CadRasterizationOptions();
                options.Layouts = new string[] { layout };

                CadLayout l = cadImage.Layouts[layout];

                if ((Math.Abs(l.MaxExtents.Y) < Epsilon && Math.Abs(l.MaxExtents.X) < Epsilon)
                    || (Math.Abs(l.MaxExtents.Y + 1E+20) < Epsilon
                    || Math.Abs(l.MaxExtents.X + 1E+20) < Epsilon)
                    || (Math.Abs(l.MinExtents.Y - 1E+20) < Epsilon
                    || Math.Abs(l.MinExtents.X - 1E+20) < Epsilon))
                {
                    // do nothing, we can automatically detect size
                    // we can not rely on PlotPaperUnits here too because it is PlotInInches by default
                }
                else
                {
                    double sizeExtX = l.MaxExtents.X - l.MinExtents.X;
                    double sizeExtY = l.MaxExtents.Y - l.MinExtents.Y;

                    if (l.PlotPaperUnits == CadPlotPaperUnits.PlotInInches)
                    {
                        options.PageHeight = CommonHelper.INtoPixels(sizeExtY, CommonHelper.DPI);
                        options.PageWidth = CommonHelper.INtoPixels(sizeExtX, CommonHelper.DPI);
                    }
                    else
                    {
                        if (l.PlotPaperUnits == CadPlotPaperUnits.PlotInMillimeters)
                        {
                            options.PageHeight = CommonHelper.MMtoPixels(sizeExtY, CommonHelper.DPI);
                            options.PageWidth = CommonHelper.MMtoPixels(sizeExtX, CommonHelper.DPI);
                        }
                        else
                        {
                            options.PageHeight = (float)sizeExtY;
                            options.PageWidth = (float)sizeExtX;
                        }
                    }
                }

                
                jpegOptions.VectorRasterizationOptions = options;

                cadImage.Save(fs, jpegOptions);
            }
        }
    }
}
        }

private static List<string> GetNotEmptyLayouts(Image cadImage, string extension)
        {
List<string> nonEmptyLayouts = new List<string>();
if (cadImage == null)
    return nonEmptyLayouts;

switch (extension)
{
    case ".dwg":
        nonEmptyLayouts = GetNotEmptyLayoutsForDwg((CadImage)cadImage);
        break;
    case ".dxf":
        nonEmptyLayouts = GetNotEmptyLayoutsForDxf((CadImage)cadImage);
        break;
}

return nonEmptyLayouts;
        }

private static List<string> GetNotEmptyLayoutsForDwg(CadImage cadImage)
        {
List<string> notEmptyLayouts = new List<string>();

foreach (CadLayout layout in cadImage.Layouts.Values)
{
    foreach (CadBlockTableObject tableObject in cadImage.BlocksTables)
    {
        if (string.Equals(tableObject.HardPointerToLayout.Value, layout.ObjectHandle, StringComparison.InvariantCultureIgnoreCase))
        {
            if (cadImage.BlockEntities.ContainsKey(tableObject.BlockName))
            {
                CadBlockEntity cadBlockEntity = cadImage.BlockEntities[tableObject.BlockName];
                if (cadBlockEntity.Entities.Length > 0)
                    notEmptyLayouts.Add(layout.LayoutName);
            }
            break;
        }
    }
}

return notEmptyLayouts;
        }

private static List<string> GetNotEmptyLayoutsForDxf(CadImage cadImage)
        {
List<string> notEmptyLayouts = new List<string>();

Dictionary<string, string> layoutBlockHandles = new Dictionary<string, string>();
foreach (CadLayout layout in cadImage.Layouts.Values)
{
    if (layout.BlockTableRecordHandle != null)
        layoutBlockHandles.Add(layout.BlockTableRecordHandle, layout.LayoutName);
}

foreach (CadBaseEntity entity in cadImage.Entities)
{
    if (layoutBlockHandles.ContainsKey(entity.SoftOwner.Value))
    {
        string layoutName = layoutBlockHandles[entity.SoftOwner.Value];
        if (!notEmptyLayouts.Contains(layoutName))
            notEmptyLayouts.Add(layoutName);
    }
}

return notEmptyLayouts;
        }