Load PDF from Memory

PDF Xpress™ supports opening a PDF document from memory.

To load an existing PDF file in memory:

Create a new OpenOptions object.
Create a new Document using a byte array containing the complete PDF file.
Create a new Document using a handle to a Global Memory buffer containing the complete PDF file.

PDF Xpress can load any well-formed PDF up to PDF version 1.7.

C# Example	Copy Code
// This code demonstrates loading a PDF document from memory PdfXpress pdfx = null; Document document = null; OpenOptions oo = null; IntPtr globalHandle = IntPtr.Zero; try { pdfx = new PdfXpress(); pdfx.Initialize(null, null); oo = new OpenOptions(); byte[] buffer; using (FileStream fs = new FileStream("C:\\test.pdf", FileMode.Open)) { buffer = new byte[fs.Length]; fs.Read(buffer, 0, (int)fs.Length); globalHandle = Marshal.AllocHGlobal((int)fs.Length); } Marshal.Copy(buffer, 0, globalHandle, buffer.Length); document = new Document(pdfx, oo, globalHandle); } catch (System.Exception) { } finally { Marshal.FreeHGlobal(globalHandle); if (null != document) { document.Dispose(); } if (null != pdfx) { pdfx.Dispose(); } }

C# Example

Copy Code

            // This code demonstrates loading a PDF document from memory
            PdfXpress pdfx = null;
            Document document = null;
            OpenOptions oo = null;
            IntPtr globalHandle = IntPtr.Zero;
            try
            {
                pdfx = new PdfXpress();
                pdfx.Initialize(null, null);
                oo = new OpenOptions();
                byte[] buffer;
               
                using (FileStream fs = new FileStream("C:\\test.pdf", FileMode.Open))
                {
                    buffer = new byte[fs.Length];
                    fs.Read(buffer, 0, (int)fs.Length);
                    globalHandle = Marshal.AllocHGlobal((int)fs.Length);
                }
                Marshal.Copy(buffer, 0, globalHandle, buffer.Length);
                document = new Document(pdfx, oo, globalHandle);
            }
            catch (System.Exception)
            {
            }
            finally
            {
                Marshal.FreeHGlobal(globalHandle);
                if (null != document)
                {
                    document.Dispose();
                }
                if (null != pdfx)
                {
                    pdfx.Dispose();
                }
            }