Working with spreadsheet document attachments Leave feedback
GroupDocs.Watermark API allows you to extract attachments in Excel document. Following code performs this functionality.
advanced_usage.add_watermarks_to_spreadsheets.SpreadsheetExtractAllAttachments
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();
// Constants.InSpreadsheetXlsx is an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
Watermarker watermarker = new Watermarker(Constants.InSpreadsheetXlsx, loadOptions);
SpreadsheetContent content = watermarker.getContent(SpreadsheetContent.class);
for (SpreadsheetWorksheet worksheet : content.getWorksheets())
{
for (SpreadsheetAttachment attachment : worksheet.getAttachments())
{
System.out.println("Alternative text: " + attachment.getAlternativeText());
System.out.println("Attachment frame x-coordinate: " + attachment.getX());
System.out.println("Attachment frame y-coordinate: " + attachment.getY());
System.out.println("Attachment frame width: " + attachment.getWidth());
System.out.println("Attachment frame height: " + attachment.getHeight());
System.out.println("Preview image size: " + attachment.getPreviewImageContent() != null ? attachment.getPreviewImageContent().length : 0);
if (attachment.isLink())
{
// The document contains only a link to the attached file
System.out.println("Full path to the attached file: " + attachment.getSourceFullName());
}
else
{
// The attached file is stored in the document
System.out.println("File type: " + attachment.getDocumentInfo().getFileType());
System.out.println("Name of the source file: " + attachment.getSourceFullName());
System.out.println("File size: " + attachment.getContent().length);
}
}
}
watermarker.close();
GroupDocs.Watermark API allows you to add attachments in Excel document. Following code performs this functionality.
advanced_usage.add_watermarks_to_spreadsheets.SpreadsheetAddAttachment
// Constants.InSpreadsheetXlsx is an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();
Watermarker watermarker = new Watermarker(Constants.InSpreadsheetXlsx, loadOptions);
File file = new File(Constants.InDocumentDocx);
byte[] attachmentBytes = new byte[(int) file.length()];
InputStream inputStream = new FileInputStream(file);
inputStream.read(attachmentBytes);
inputStream.close();
file = new File(Constants.DocumentPreviewPng);
byte[] previewImageBytes = new byte[(int) file.length()];
inputStream = new FileInputStream(file);
inputStream.read(previewImageBytes);
inputStream.close();
SpreadsheetContent content = watermarker.getContent(SpreadsheetContent.class);
SpreadsheetWorksheet worksheet = content.getWorksheets().get_Item(0);
// Add the attachment
worksheet.getAttachments().addAttachment(attachmentBytes, // File content
"sample document.docx", // Source file full name (the extension is used
// to determine appropriate application to open
// the file)
previewImageBytes, // Preview image content
50, // X-coordinate of the attachment frame
100, // Y-coordinate of the attachment frame
200, // Attachment frame width
400); // Attachment frame height
// Save changes
watermarker.save(Constants.OutSpreadsheetXlsx);
watermarker.close();
GroupDocs.Watermark API allows you to add linked attachments in Excel document. Following code performs this functionality.
advanced_usage.add_watermarks_to_spreadsheets.SpreadsheetAddLinkedAttachment
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();
// Constants.InSpreadsheetXlsx is an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
Watermarker watermarker = new Watermarker(Constants.InSpreadsheetXlsx, loadOptions);
SpreadsheetContent content = watermarker.getContent(SpreadsheetContent.class);
SpreadsheetWorksheet worksheet = content.getWorksheets().get_Item(0);
File file = new File(Constants.DocumentPreviewPng);
byte[] previewImageBytes = new byte[(int) file.length()];
FileInputStream inputStream = new FileInputStream(file);
inputStream.read(previewImageBytes);
inputStream.close();
// Add the attachment
worksheet.getAttachments().addLink(Constants.InDocumentDocx, // Source file path
previewImageBytes, // Preview image content
50, // X-coordinate of the attachment frame
100, // Y-coordinate of the attachment frame
200, // Attachment frame width
400); // Attachment frame height
// Save changes
watermarker.save(Constants.OutSpreadsheetXlsx);
watermarker.close();
GroupDocs.Watermark API allows you to remove attachments in Excel document. Following code performs this functionality.
advanced_usage.add_watermarks_to_spreadsheets.SpreadsheetRemoveAttachment
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();
// Constants.InSpreadsheetXlsx is an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
Watermarker watermarker = new Watermarker(Constants.InSpreadsheetXlsx, loadOptions);
SpreadsheetContent content = watermarker.getContent(SpreadsheetContent.class);
for (SpreadsheetWorksheet worksheet : content.getWorksheets())
{
for (int i = worksheet.getAttachments().getCount() - 1; i >= 0; i--)
{
SpreadsheetAttachment attachment = worksheet.getAttachments().get_Item(i);
if (attachment.isLink() &&
!new File(attachment.getSourceFullName()).exists() || // Linked file that is not available at this moment
attachment.getDocumentInfo().isEncrypted()) // Attached file protected with a password
{
// Remove the file if it meets at least one of the conditions above
worksheet.getAttachments().removeAt(i);
}
}
}
// Save changes
watermarker.save(Constants.OutSpreadsheetXlsx);
watermarker.close();
GroupDocs.Watermark API allows you to add watermark to all attachments in Excel document. Following code performs this functionality.
advanced_usage.add_watermarks_to_spreadsheets.SpreadsheetAddWatermarkToAttachment
TextWatermark watermark = new TextWatermark("Test watermark", new Font("Arial", 19));
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();
// Constants.InSpreadsheetXlsx is an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
Watermarker watermarker = new Watermarker(Constants.InSpreadsheetXlsx, loadOptions);
SpreadsheetContent content = watermarker.getContent(SpreadsheetContent.class);
for (SpreadsheetWorksheet worksheet : content.getWorksheets())
{
for (SpreadsheetAttachment attachment : worksheet.getAttachments())
{
// Check if the attached file is supported by GroupDocs.Watermark
IDocumentInfo info = attachment.getDocumentInfo();
if (info.getFileType() != FileType.Unknown && !info.isEncrypted())
{
// Load the attached document
Watermarker attachedWatermarker = attachment.createWatermarker();
// Add watermark
attachedWatermarker.add(watermark);
// Save changes in the attached file
attachment.updateContent(attachedWatermarker);
attachedWatermarker.close();
}
}
}
// Save changes
watermarker.save(Constants.OutSpreadsheetXlsx);
watermarker.close();
GroupDocs.Watermark API allows you to search for all the images and watermarkable attachments in Excel document. Following code performs this functionality.
advanced_usage.add_watermarks_to_spreadsheets.SpreadsheetSearchImageInAttachment
// Consider only the attached images
WatermarkerSettings settings = new WatermarkerSettings();
settings.getSearchableObjects().setSpreadsheetSearchableObjects(SpreadsheetSearchableObjects.AttachedImages);
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();
// Constants.InSpreadsheetXlsx is an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
Watermarker watermarker = new Watermarker(Constants.InSpreadsheetXlsx, loadOptions, settings);
// Specify sample image to compare document images with
ImageSearchCriteria criteria = new ImageDctHashSearchCriteria(Constants.AttachmentPng);
// Search for similar images
PossibleWatermarkCollection possibleWatermarks = watermarker.search(criteria);
// Remove or modify found image watermarks
// ...
System.out.println("Found " + possibleWatermarks.getCount() + " possible watermark(s).");
watermarker.close();
You may easily run the code above and see the feature in action in our GitHub examples:
Along with full featured Java library we provide simple, but powerful free Apps.
You are welcome to add watermark to PDF, DOC, DOCX, PPT, PPTX, XLS, XLSX, Emails and more with our free online Free Online Document Watermarking App.
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