获取外部文件的引用

如何获取外部文件的引用

问题： 如何获取外部文件的引用 (CADNET-110)。

提示： 要获取实体块中图纸的外部文件的引用，可以使用 XRef PathName 字段，对于光栅图像使用 CadRasterImage Def， 对于外部底图使用 CadDgnUnderlay，并使用其 UnderlayPath 字段。

示例：

External drawing:

foreach (CadBaseEntity baseEntity in image.Entities)
{
    // if entity is a block
    if (baseEntity.TypeName == CadEntityTypeName.INSERT)
    {
        CadInsertObject insert = (CadInsertObject)baseEntity;
        CadBlockEntity block = image.BlockEntities[insert.Name];

        // get external reference to object
        System.Console.WriteLine(block.XRefPathName);
    }
}

External raster image:
foreach (CadBaseObject baseObject in image.Objects)
{
    // if entity is an image definition
    if (baseObject.TypeName == CadObjectTypeName.IMAGEDEF)
    {
        CadRasterImageDef rasterImageDef = (CadRasterImageDef)baseObject;
      
        // get external reference to object
        System.Console.WriteLine(rasterImageDef.FileName);
    }
}

External underlay:

foreach (CadBaseEntity baseEntity in cadImage.Entities)
{
  if (baseEntity.TypeName == CadEntityTypeName.DGNUNDERLAY) // or DWFUNDERLAY, or PDFUNDERLAY
  {
    CadDgnUnderlay dgnFile = (CadDgnUnderlay)baseEntity; // or CadDwfUnderlay, or CadPdfUnderlay
    System.Console.WriteLine(dgnFile.UnderlayPath);
  }
}