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();
// Specify an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
Watermarker watermarker = new Watermarker("spreadsheet.xlsx", 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
// Specify an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();
Watermarker watermarker = new Watermarker("spreadsheet.xlsx", loadOptions);
File file = new File("document.docx");
byte[] attachmentBytes = new byte[(int) file.length()];
InputStream inputStream = new FileInputStream(file);
inputStream.read(attachmentBytes);
inputStream.close();
file = new File("document_preview.png");
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("spreadsheet.xlsx");
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();
// Specify an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
Watermarker watermarker = new Watermarker("spreadsheet.xlsx", loadOptions);
SpreadsheetContent content = watermarker.getContent(SpreadsheetContent.class);
SpreadsheetWorksheet worksheet = content.getWorksheets().get_Item(0);
File file = new File("document_preview.png");
byte[] previewImageBytes = new byte[(int) file.length()];
FileInputStream inputStream = new FileInputStream(file);
inputStream.read(previewImageBytes);
inputStream.close();
// Add the attachment
worksheet.getAttachments().addLink("document.docx", // 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("spreadsheet.xlsx");
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();
// Specify an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
Watermarker watermarker = new Watermarker("spreadsheet.xlsx", 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("spreadsheet.xlsx");
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();
// Specify an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
Watermarker watermarker = new Watermarker("spreadsheet.xlsx", 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("spreadsheet.xlsx");
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();
// Specify an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
Watermarker watermarker = new Watermarker("spreadsheet.xlsx", loadOptions, settings);
// Specify sample image to compare document images with
ImageSearchCriteria criteria = new ImageDctHashSearchCriteria("attachment.png");
// 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();
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