使用 GroupDocs.Editor 在 .NET 中优化和保护 DOCX 文件：高级指南

dotnet add package GroupDocs.Editor

Install-Package GroupDocs.Editor

// Set GroupDocs License
License license = new License();
license.SetLicense("Path to License File");

using System.IO;
using GroupDocs.Editor;
using GroupDocs.Editor.Options;

string inputFilePath = "YOUR_DOCUMENT_DIRECTORY/sample_docx_with_form_fields.docx";
using (FileStream fs = File.OpenRead(inputFilePath))
{
    // Create load options with password protection if needed
    WordProcessingLoadOptions loadOptions = new WordProcessingLoadOptions();
    loadOptions.Password = "some_password_to_open_a_document";

    // Initialize the Editor with the file stream and load options
    using (Editor editor = new Editor(fs, loadOptions))
    {
        // The document is now loaded and ready for further processing.
    }
}

using System;
using GroupDocs.Editor.Words.FieldManagement;

// Assume editor instance is already created with the loaded document.
FormFieldManager fieldManager = editor.FormFieldManager;
FormFieldCollection collection = fieldManager.FormFieldCollection;

bool hasInvalidFormFields = fieldManager.HasInvalidFormFields();
Console.WriteLine("FormFieldCollection contains invalid items: {0}", hasInvalidFormFields);

// Retrieve all invalid form field names
var invalidFormFields = fieldManager.GetInvalidFormFieldNames();
foreach (var invalidItem in invalidFormFields)
{
    // Assign a unique fixed name using a GUID
    invalidItem.FixedName = string.Format("{0}_{1}", invalidItem.Name, Guid.NewGuid());
}

// Fix the identified invalid form fields with their new names
fieldManager.FixInvalidFormFieldNames(invalidFormFields);
collection = fieldManager.FormFieldCollection;

using System.IO;
using GroupDocs.Editor.Options;

WordProcessingFormats docFormat = WordProcessingFormats.Docx;
WordProcessingSaveOptions saveOptions = new WordProcessingSaveOptions(docFormat);

// Enable memory optimization for large documents
saveOptions.OptimizeMemoryUsage = true;

// Set document protection to allow only form field editing with a password
saveOptions.Protection = new WordProcessingProtection(WordProcessingProtectionType.AllowOnlyFormFields, "write_password");

// Prepare an output stream for saving the processed document
using (MemoryStream outputStream = new MemoryStream())
{
    // Save the document using specified options
    editor.Save(outputStream, saveOptions);

    // Optionally, write the result to a file
    File.WriteAllBytes("YOUR_OUTPUT_DIRECTORY/processed_document.docx", outputStream.ToArray());
}