protected Stream GetPreviewImagesPowerPointStream(Content content, IEnumerable <SNCR.Image> previewImages, RestrictionType?restrictionType = null)
{
CheckLicense(LicenseProvider.Slides);
try
{
var ms = new MemoryStream();
var extension = ContentNamingHelper.GetFileExtension(content.Name).ToLower();
var oldPpt = PRESENTATION_EXTENSIONS.Contains(extension);
var saveFormat = oldPpt ? Aspose.Slides.Export.SaveFormat.Ppt : Aspose.Slides.Export.SaveFormat.Pptx;
var docPresentation = new Presentation();
var index = 1;
foreach (var previewImage in previewImages.Where(previewImage => previewImage != null))
{
using (var imgStream = GetRestrictedImage(previewImage, restrictionType: restrictionType))
{
var image = System.Drawing.Image.FromStream(imgStream);
var imageForDocument = ResizeImage(image, Math.Min(image.Width, PREVIEW_POWERPOINT_WIDTH), Math.Min(image.Height, PREVIEW_POWERPOINT_HEIGHT));
if (imageForDocument != null)
{
try
{
var img = docPresentation.Images.AddImage(imageForDocument);
var slide = docPresentation.Slides[0];
if (index > 1)
{
docPresentation.Slides.AddClone(slide);
slide = docPresentation.Slides[index - 1];
}
slide.Shapes.AddPictureFrame(Aspose.Slides.ShapeType.Rectangle, 10, 10,
imageForDocument.Width, imageForDocument.Height,
img);
}
catch (IndexOutOfRangeException ex)
{
Logger.WriteException(new Exception("Error during document generation. Path: " + previewImage.Path, ex));
break;
}
}
}
index++;
}
docPresentation.Save(ms, saveFormat);
ms.Seek(0, SeekOrigin.Begin);
return(ms);
}
catch (Exception ex)
{
Logger.WriteException(ex);
}
return(null);
}
protected static DocumentFormat GetFormatByName(string fileName)
{
if (string.IsNullOrEmpty(fileName))
{
return(DocumentFormat.Pdf);
}
var extension = ContentNamingHelper.GetFileExtension(fileName).ToLower();
if (PDF_EXTENSIONS.Contains(extension))
{
return(DocumentFormat.Pdf);
}
if (PRESENTATION_EXTENSIONS.Contains(extension))
{
return(DocumentFormat.Ppt);
}
if (PRESENTATIONEX_EXTENSIONS.Contains(extension))
{
return(DocumentFormat.Pptx);
}
if (WORKBOOK_EXTENSIONS.Contains(extension))
{
return(extension.EndsWith("x") ? DocumentFormat.Xlsx : DocumentFormat.Xls);
}
if (WORD_EXTENSIONS.Contains(extension))
{
return(extension.EndsWith("x") ? DocumentFormat.Docx : DocumentFormat.Doc);
}
return(DocumentFormat.Pdf);
}
public override bool IsContentSupported(STORAGE.Node content)
{
return(SUPPORTED_EXTENSIONS.Contains(ContentNamingHelper.GetFileExtension(content.Name).ToLower()));
}
