RevitAPI有匯出圖片的功能，那就是使用Document.ExportImage方法，一個實際的例子如下

FilteredElementCollector FEC_Views = new FilteredElementCollector(OpenDoc).OfClass(typeof(View));
FEC_Views.OfCategory(BuiltInCategory.OST_Views);
StringBuilder sb = new StringBuilder();
foreach (View View in FEC_Views)
{
    if (View.IsTemplate) continue;
    IList<ElementId> ImageExportList = new List<ElementId>();
    ImageExportList.Clear();
    ImageExportList.Add(View.Id);
    var NewViewName = View.Name.ToString().Replace(".", "-");
    var BilledeExportOptions_3D_PNG = new ImageExportOptions
    {
        ZoomType = ZoomFitType.FitToPage,
        PixelSize = 2024,
        FilePath = ParentFolder + @"\" + NewViewName,
        FitDirection = FitDirectionType.Horizontal,
        HLRandWFViewsFileType = ImageFileType.PNG,
        ImageResolution = ImageResolution.DPI_600,
        ExportRange = ExportRange.SetOfViews,
    };

    BilledeExportOptions_3D_PNG.SetViewsAndSheets(ImageExportList);
    try
    {
        OpenDoc.ExportImage(BilledeExportOptions_3D_PNG);
    }
    catch (Exception ex)
    {
        sb.AppendLine(View.Id.ToString());
        sb.AppendLine(ex.ToString());
    }
}
 

一般情況下，都能正確按照期望匯出。但是，有些檔案卻匯出了一些.JPG檔案，不是已經通過HLRandWFViewsFileType = ImageFileType.PNG設定好了匯出格式是PNG嗎？

原來格式設定包含兩方面：1.隱藏線和線框設定，通過HLRandWFViewsFileType 2.陰影設定，通過ShadowViewsFileType。
那麼改進的方法就是把ShadowViewsFileType也設定成.PNG:

    var BilledeExportOptions_3D_PNG = new ImageExportOptions
    {
        ZoomType = ZoomFitType.FitToPage,
        PixelSize = 2024,
        FilePath = ParentFolder + @"\" + NewViewName,
        FitDirection = FitDirectionType.Horizontal,
        HLRandWFViewsFileType = ImageFileType.PNG,
        ShadowViewsFileType = ImageFileType.PNG,
        ImageResolution = ImageResolution.DPI_600,
        ExportRange = ExportRange.SetOfViews,
    };