تشفير وفك تشفير ملفات إكسل باستخدام JavaScript عبر C++

استخدام Microsoft Excel

لضبط إعدادات تشفير الملف في Microsoft Excel (هنا Microsoft Excel 2003):

  1. من قائمة الأدوات، حدد الخيارات. ستظهر نافذة حوارية.
  2. اختر علامة التبويب الأمان.
  3. أدخل كلمة مرور وانقر على مُتقدم
  4. اختر نوع التشفير و confirms كلمة المرور.

تشفير ملف إكسل باستخدام Aspose.Cells for JavaScript عبر C++

يوضح المثال التالي كيفية تشفير وحماية كلمة المرور لملف إكسل باستخدام API الخاص بـ Aspose.Cells.

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Aspose.Cells Example - Encrypt Workbook</h1>
        <input type="file" id="fileInput" accept=".xls,.xlsx" />
        <button id="runExample">Run Example</button>
        <a id="downloadLink" style="display: none;">Download Result</a>
        <div id="result"></div>
    </body>

    <script src="aspose.cells.js.min.js"></script>
    <script type="text/javascript">
        const { Workbook, SaveFormat } = AsposeCells;

        AsposeCells.onReady({
            license: "/lic/aspose.cells.enc",
            fontPath: "/fonts/",
            fontList: [
                "arial.ttf",
                "NotoSansSC-Regular.ttf"
            ]
        }).then(() => {
            console.log("Aspose.Cells initialized");
        });

        document.getElementById('runExample').addEventListener('click', async () => {
            const fileInput = document.getElementById('fileInput');
            if (!fileInput.files.length) {
                document.getElementById('result').innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
                return;
            }

            const file = fileInput.files[0];
            const arrayBuffer = await file.arrayBuffer();

            // Instantiate a Workbook object by opening the uploaded excel file.
            const workbook = new Workbook(new Uint8Array(arrayBuffer));

            // Specify XOR encryption type.
            workbook.encryptionOptions = { type: AsposeCells.EncryptionType.XOR, keyLength: 40 };

            // Specify Strong Encryption type (RC4, Microsoft Strong Cryptographic Provider).
            workbook.encryptionOptions = { type: AsposeCells.EncryptionType.StrongCryptographicProvider, keyLength: 128 };

            // Password protect the file.
            workbook.settings.password = "1234";

            // Save the excel file.
            const outputData = workbook.save(SaveFormat.Excel97To2003);
            const blob = new Blob([outputData]);
            const downloadLink = document.getElementById('downloadLink');
            downloadLink.href = URL.createObjectURL(blob);
            downloadLink.download = 'encryptedBook1.out.xls';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Encrypted Excel File';

            document.getElementById('result').innerHTML = '<p style="color: green;">Workbook encrypted and ready for download.</p>';
        });
    </script>
</html>

تحديد خيار كلمة المرور للتعديل

المثال التالي يوضح كيفية ضبط خيار Microsoft Excel كلمة المرور للتعديل لملف موجود باستخدام واجهة برمجة التطبيقات Aspose.Cells.

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Specify Password To Modify Example</h1>
        <input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
        <button id="runExample">Run Example</button>
        <a id="downloadLink" style="display: none;">Download Result</a>
        <div id="result"></div>
    </body>

    <script src="aspose.cells.js.min.js"></script>
    <script type="text/javascript">
        const { Workbook, SaveFormat, Utils } = AsposeCells;

        AsposeCells.onReady({
            license: "/lic/aspose.cells.enc",
            fontPath: "/fonts/",
            fontList: [
                "arial.ttf",
                "NotoSansSC-Regular.ttf"
            ]
        }).then(() => {
            console.log("Aspose.Cells initialized");
        });

        document.getElementById('runExample').addEventListener('click', async () => {
            const fileInput = document.getElementById('fileInput');
            if (!fileInput.files.length) {
                document.getElementById('result').innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
                return;
            }

            const file = fileInput.files[0];
            const arrayBuffer = await file.arrayBuffer();

            // Instantiating a Workbook object from the uploaded file
            const workbook = new Workbook(new Uint8Array(arrayBuffer));

            // Set the password for modification.
            workbook.settings.writeProtection.password = "1234";

            // Save the excel file.
            const outputData = workbook.save(SaveFormat.Excel97To2003);
            const blob = new Blob([outputData]);
            const downloadLink = document.getElementById('downloadLink');
            downloadLink.href = URL.createObjectURL(blob);
            downloadLink.download = 'SpecifyPasswordToModifyOption.out.xls';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Modified Excel File';

            document.getElementById('result').innerHTML = '<p style="color: green;">Password-to-modify set successfully! Click the download link to get the modified file.</p>';
        });
    </script>
</html>

فك تشفير ملف إكسل باستخدام Aspose.Cells for JavaScript عبر C++

من السهل جدًا فتح ملف إكسل محمي بكلمة مرور وفكه باستخدام API الخاص بـ Aspose.Cells كما هو موضح في الكود التالي:

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Open Encrypted Excel and Remove Password</h1>
        <input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
        <button id="runExample">Run Example</button>
        <a id="downloadLink" style="display: none;">Download Result</a>
        <div id="result"></div>
    </body>

    <script src="aspose.cells.js.min.js"></script>
    <script type="text/javascript">
        const { Workbook, LoadOptions, SaveFormat, Utils } = AsposeCells;

        AsposeCells.onReady({
            license: "/lic/aspose.cells.enc",
            fontPath: "/fonts/",
            fontList: [
                "arial.ttf",
                "NotoSansSC-Regular.ttf"
            ]
        }).then(() => {
            console.log("Aspose.Cells initialized");
        });

        document.getElementById('runExample').addEventListener('click', async () => {
            const fileInput = document.getElementById('fileInput');
            if (!fileInput.files.length) {
                document.getElementById('result').innerHTML = '<p style="color: red;">Please select an encrypted Excel file.</p>';
                return;
            }

            const file = fileInput.files[0];
            const arrayBuffer = await file.arrayBuffer();

            // Prepare load options with password to open encrypted file
            const loadOptions = new LoadOptions();
            loadOptions.password = "password";

            // Instantiate workbook from uploaded file with load options
            const workbook = new Workbook(new Uint8Array(arrayBuffer), loadOptions);

            // Remove password from workbook settings
            workbook.settings.password = null;

            // Save the workbook and provide download link
            const outputData = workbook.save(SaveFormat.Xlsx);
            const blob = new Blob([outputData]);
            const downloadLink = document.getElementById('downloadLink');
            // Use original filename with suffix to indicate password removed
            const originalName = file.name || 'output.xlsx';
            const baseName = originalName.replace(/(\.xls[xm]?|\.csv)$/i, '') || 'output';
            downloadLink.href = URL.createObjectURL(blob);
            downloadLink.download = baseName + '.unlocked.xlsx';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Unlocked Excel File';

            document.getElementById('result').innerHTML = '<p style="color: green;">Password removed successfully! Click the download link to get the unlocked file.</p>';
        });
    </script>
</html>

مواضيع متقدمة

حماية وإلغاء حماية ورقة العمل باستخدام JavaScript عبر C++