public string[] ConvertToPDF([FromBody] FileManagerDirectoryContent args)
{
string fileLocation = this.baseLocation + args.Path.Replace("/", "\\");
// If document get open from zip file, we have maintained the extracted document path in TargetPath property.
if (args.TargetPath != null)
{
fileLocation = args.TargetPath;
}
List <string> returnArray = new List <string>();
using FileStream fs = new FileStream(fileLocation, FileMode.Open, FileAccess.Read);
//Open the existing presentation
IPresentation presentation = Syncfusion.Presentation.Presentation.Open(fs);
//Convert the PowerPoint document to PDF document.
PdfDocument pdfDocument = PresentationToPdfConverter.Convert(presentation);
//Save the document as a stream and retrun the stream
MemoryStream stream = new MemoryStream();
//Save the created PowerPoint document to MemoryStream
pdfDocument.Save(stream);
stream.Position = 0;
returnArray.Add("data:application/pdf;base64," + Convert.ToBase64String(stream.ToArray()));
//Dispose the document objects.
presentation.Dispose();
pdfDocument.Dispose();
stream.Dispose();
return(returnArray.ToArray());
}
/// <summary>
/// Dispose the elements
/// </summary>
private void Dispose()
{
DeleteLocalFolder();
if (_presentation != null)
{
_presentation.Dispose();
_presentation = null;
}
if (!_isWindowsPhone)
{
Image image = MainViewImageGrid.Children[0] as Image;
if (image != null)
{
image.ClearValue(Image.SourceProperty);
image.ClearValue(Image.StretchProperty);
}
MainViewImageGrid.Children.Clear();
ThumbnailGrid.Children.Clear();
}
if (_isWindowsPhone)
{
if (ThumbnailStackPanel != null)
{
ThumbnailStackPanel.Children.Clear();
}
}
}
public IActionResult GetPreviewImage(FileManagerFilterContent args)
{
string baseFolder = this.basePath + "\\wwwroot\\SharedFiles";
try
{
String fullPath = baseFolder + args.Path;
string extension = Path.GetExtension(fullPath);
Stream imageStream = null;
if (extension == Constants.Pdf)
{
FileStream fileStream = new FileStream(fullPath, FileMode.Open, FileAccess.Read);
PdfRenderer pdfExportImage = new PdfRenderer();
//Loads the PDF document
pdfExportImage.Load(fileStream);
//Exports the PDF document pages into images
Bitmap[] bitmapimage = pdfExportImage.ExportAsImage(0, 0);
imageStream = new MemoryStream();
bitmapimage[0].Save(imageStream, System.Drawing.Imaging.ImageFormat.Png);
imageStream.Position = 0;
pdfExportImage.Dispose();
fileStream.Close();
}
else if (extension == Constants.Docx || extension == Constants.Rtf || extension == Constants.Doc)
{
FileStream fileStream = new FileStream(fullPath, FileMode.Open, FileAccess.Read);
//Loads file stream into Word document
WordDocument document = new WordDocument(fileStream, Syncfusion.DocIO.FormatType.Automatic);
fileStream.Dispose();
//Instantiation of DocIORenderer for Word to PDF conversion
DocIORenderer render = new DocIORenderer();
//Converts Word document into PDF document
PdfDocument pdfDocument = render.ConvertToPDF(document);
//Releases all resources used by the Word document and DocIO Renderer objects
render.Dispose();
document.Dispose();
//Saves the PDF file
MemoryStream outputStream = new MemoryStream();
pdfDocument.Save(outputStream);
outputStream.Position = 0;
//Closes the instance of PDF document object
pdfDocument.Close();
PdfRenderer pdfExportImage = new PdfRenderer();
//Loads the PDF document
pdfExportImage.Load(outputStream);
//Exports the PDF document pages into images
Bitmap[] bitmapimage = pdfExportImage.ExportAsImage(0, 0);
imageStream = new MemoryStream();
bitmapimage[0].Save(imageStream, System.Drawing.Imaging.ImageFormat.Png);
imageStream.Position = 0;
fileStream.Close();
}
else if (extension == Constants.Pptx)
{
IPresentation presentation = Presentation.Open(fullPath);
//Initialize PresentationRenderer for image conversion
presentation.PresentationRenderer = new PresentationRenderer();
//Convert the first slide to image
imageStream = presentation.Slides[0].ConvertToImage(ExportImageFormat.Png);
presentation.Dispose();
}
FileStreamResult fileStreamResult = new FileStreamResult(imageStream, "APPLICATION/octet-stream");
return(fileStreamResult);
}
catch
{
return(null);
}
}
public string GetPreview([FromBody] FileManagerDirectoryContent args)
{
string baseFolder = this.basePath + "\\wwwroot\\Files";
try
{
String fullPath = baseFolder + args.Path;
string extension = Path.GetExtension(fullPath);
Stream imageStream = null;
if (extension == Constants.Pdf)
{
try
{
FileStream fileStream = new FileStream(fullPath, FileMode.Open, FileAccess.Read);
PdfRenderer pdfExportImage = new PdfRenderer();
//Loads the PDF document
pdfExportImage.Load(fileStream);
//Exports the PDF document pages into images
Bitmap[] bitmapimage = pdfExportImage.ExportAsImage(0, 0);
imageStream = new MemoryStream();
bitmapimage[0].Save(imageStream, System.Drawing.Imaging.ImageFormat.Png);
imageStream.Position = 0;
pdfExportImage.Dispose();
fileStream.Close();
}
catch
{
imageStream = null;
}
}
else if (extension == Constants.Docx || extension == Constants.Rtf || extension == Constants.Doc || extension == Constants.Txt)
{
try
{
FileStream fileStream = new FileStream(fullPath, FileMode.Open, FileAccess.Read);
//Loads file stream into Word document
DocIO.WordDocument document = new DocIO.WordDocument(fileStream, GetDocIOFormatType(extension));
fileStream.Dispose();
//Instantiation of DocIORenderer for Word to PDF conversion
DocIORenderer render = new DocIORenderer();
//Converts Word document into PDF document
PdfDocument pdfDocument = render.ConvertToPDF(document);
//Releases all resources used by the Word document and DocIO Renderer objects
render.Dispose();
document.Dispose();
//Saves the PDF file
MemoryStream outputStream = new MemoryStream();
pdfDocument.Save(outputStream);
outputStream.Position = 0;
//Closes the instance of PDF document object
pdfDocument.Close();
PdfRenderer pdfExportImage = new PdfRenderer();
//Loads the PDF document
pdfExportImage.Load(outputStream);
//Exports the PDF document pages into images
Bitmap[] bitmapimage = pdfExportImage.ExportAsImage(0, 0);
imageStream = new MemoryStream();
bitmapimage[0].Save(imageStream, System.Drawing.Imaging.ImageFormat.Png);
imageStream.Position = 0;
fileStream.Close();
}
catch
{
imageStream = null;
}
}
else if (extension == Constants.Pptx)
{
try
{
IPresentation presentation = Presentation.Open(fullPath);
//Initialize PresentationRenderer for image conversion
presentation.PresentationRenderer = new PresentationRenderer();
//Convert the first slide to image
imageStream = presentation.Slides[0].ConvertToImage(ExportImageFormat.Png);
presentation.Dispose();
}
catch
{
imageStream = null;
}
}
if (imageStream != null)
{
byte[] bytes = new byte[imageStream.Length];
imageStream.Read(bytes);
string base64 = Convert.ToBase64String(bytes);
return("data:image/png;base64, " + base64);
}
else
{
return("Error");
}
}
catch
{
return("Error");
}
}
