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How to: Protect a Document

  • 2 minutes to read

Document protection prevents users from modifying a document (add, format or delete document parts, insert tables, images, comments, etc.).

The following example demonstrates how to protect a document:

using (var wordProcessor = new RichEditDocumentSever())
{
  wordProcessor.LoadDocument("Documents//Grimm.docx");
  Document document = wordProcessor.Document;

  if (!document.IsDocumentProtected)
  {
    // Protect the document with a password
    document.Protect("123", DocumentProtectionType.ReadOnly);

    // Insert a comment indicating that the document is protected
    document.Comments.Create(document.Paragraphs[0].Range, "Admin");
    SubDocument commentDocument = document.Comments[0].BeginUpdate();
    commentDocument.InsertText(commentDocument.CreatePosition(0), 
    "Document is protected with a password.\nYou cannot modify the document until protection is removed.");
    commentDocument.EndUpdate();
  }
}

Unprotect a Document

Use the Document.Unprotect method to remove protection.

using (var wordProcessor = new RichEditDocumentSever())
{
  wordProcessor.LoadDocument("Documents//Grimm_Protected.docx");
  Document document = wordProcessor.Document;

  if (document.IsDocumentProtected == true)
  {
    // Unprotect the document
    document.Unprotect();

    // Insert a comment indicating that the document can be edited
    document.Comments.Create(document.Paragraphs[0].Range,"Admin");
    SubDocument commentDocument = document.Comments[0].BeginUpdate();
    commentDocument.InsertText(commentDocument.CreatePosition(0),
    "Document is unprotected. You can modify the document.");
    commentDocument.EndUpdate();
  }
}