Create & Delete Thumbnails

Within a PDF document, each page may have zero or one thumbnail images associated with it. These thumbnails are stored within the PDF document. PDF Xpress™ can be used to create or delete thumbnails within the PDF document.

Create Thumbnails

Thumbnails can be created on a specified page from image information accessed from file, handle, memory, or ImageDataInfo object. To create a thumbnail, use the CreateThumbnail methods.

C# Example	Copy Code
// This code demonstrates how to add a thumbnail from a file Accusoft.PdfXpressSdk.PdfXpress pdfXpress1 = null; Document document = null; try { pdfXpress1 = new PdfXpress(); pdfXpress1.Initialize(); document = new Document(pdfXpress1, " C:\test.pdf"); document.CreateThumbnail(0, "C:\testImage.jpg", 0); } catch (System.Exception) { } finally { if (null != document) { document.Dispose(); } if (null != pdfXpress1) { pdfXpress1.Dispose(); } }

C# Example

Copy Code

            // This code demonstrates how to add a thumbnail from a file
            Accusoft.PdfXpressSdk.PdfXpress pdfXpress1 = null;
            Document document = null;
            try
            {
                pdfXpress1 = new PdfXpress();
                pdfXpress1.Initialize();
                document = new Document(pdfXpress1, " C:\test.pdf");
                document.CreateThumbnail(0, "C:\testImage.jpg", 0);
            }
            catch (System.Exception)
            {
            }
            finally
            {
                if (null != document)
                {
                    document.Dispose();
                }
                if (null != pdfXpress1)
                {
                    pdfXpress1.Dispose();
                }
            }

C# Example	Copy Code
// This code demonstrates how to add a thumbnail from Global Memory public void AddThumbnailFromGlobalMemory(Document document, Int32 pageIndex, IntPtr globalBufferHandlePtr, Int32 imagePageIndex) { try { document.CreateThumbnail(pageIndex, globalBufferHandlePtr, imagePageIndex); } catch (PdfXpressLibraryException) { // A problem was encountered attempting to add thumbnail. } catch (PdfXpressException) { // A problem was encountered attempting to add thumbnail. } finally { } }

C# Example

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        // This code demonstrates how to add a thumbnail from Global Memory
        public void AddThumbnailFromGlobalMemory(Document document, Int32 pageIndex, IntPtr globalBufferHandlePtr, Int32 imagePageIndex)
        {
            try
            {
                document.CreateThumbnail(pageIndex, globalBufferHandlePtr, imagePageIndex);
            }
            catch (PdfXpressLibraryException)
            {
                // A problem was encountered attempting to add thumbnail.
            }
            catch (PdfXpressException)
            {
                // A problem was encountered attempting to add thumbnail.
            }
            finally
            {
            }
        }

C# Example	Copy Code
// This code demonstrates how to add a thumbnail from Local Memory public void AddThumbnailFromLocalMemory(Document document, Int32 pageIndex, byte[] imageData, Int32 imagePageIndex) { try { document.CreateThumbnail(pageIndex, imageData, imagePageIndex); } catch (PdfXpressLibraryException) { // A problem was encountered attempting to add thumbnail. } catch (PdfXpressException) { // A problem was encountered attempting to add thumbnail. } finally { } }

C# Example

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        // This code demonstrates how to add a thumbnail from Local Memory
        public void AddThumbnailFromLocalMemory(Document document, Int32 pageIndex, byte[] imageData, Int32 imagePageIndex)
        {
            try
            {
                document.CreateThumbnail(pageIndex, imageData, imagePageIndex);
            }
            catch (PdfXpressLibraryException)
            {
                // A problem was encountered attempting to add thumbnail.
            }
            catch (PdfXpressException)
            {
                // A problem was encountered attempting to add thumbnail.
            }
            finally
            {
            }
        }

Delete Thumbnails

To delete a thumbnail on a specified page of the PDF document, call the DeleteThumbnail method.

C# Example	Copy Code
// This code demonstrates how to delete a thumbnail Accusoft.PdfXpressSdk.PdfXpress pdfXpress1 = null; Document document = null; try { pdfXpress1 = new PdfXpress(); pdfXpress1.Initialize(); document = new Document(pdfXpress1, "C:\\pdfsample.pdf"); document.DeleteThumbnail(0); } catch (System.Exception) { } finally { if (null != document) { document.Dispose(); } if (null != pdfXpress1) { pdfXpress1.Dispose(); } }

C# Example

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            // This code demonstrates how to delete a thumbnail
            Accusoft.PdfXpressSdk.PdfXpress pdfXpress1 = null;
            Document document = null;
            try
            {
                pdfXpress1 = new PdfXpress();
                pdfXpress1.Initialize();
                document = new Document(pdfXpress1, "C:\\pdfsample.pdf");
                document.DeleteThumbnail(0);
            }
            catch (System.Exception)
            {
            }
            finally
            {
                if (null != document)
                {
                    document.Dispose();
                }
                if (null != pdfXpress1)
                {
                    pdfXpress1.Dispose();
                }
            }