EVO HTML to PDF Converter

Set Permissions and Password of the Generated PDF Document

EVO HTML to PDF Converter for .NET Documentation

EVO HTML to PDF Converter allows you set the permissions of generated PDF document like printing and editing and to password protect the generated PDF document with separate user and owner passwords.

The PDF security options can be set in HtmlToPdfConverterPdfSecurityOptions object. The possible options are detailed below.

PDF Security Options

Code Sample - Set Permissions and Password of the Generated PDF Document
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protected void convertToPdfButton_Click(object sender, EventArgs e)
{
    // Create a HTML to PDF converter object with default settings
    HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter();

    // Set license key received after purchase to use the converter in licensed mode
    // Leave it not set to use the converter in demo mode
    htmlToPdfConverter.LicenseKey = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c=";

    // Set an adddional delay in seconds to wait for JavaScript or AJAX calls after page load completed
    // Set this property to 0 if you don't need to wait for such asynchcronous operations to finish
    htmlToPdfConverter.ConversionDelay = 2;

    // Set the encryption algorithm and the encryption key size if they are not the default ones
    if (!bit128RadioButton.Checked || !rc4RadioButton.Checked)
    {
        // set the encryption algorithm
        htmlToPdfConverter.PdfSecurityOptions.EncryptionAlgorithm = rc4RadioButton.Checked ? EncryptionAlgorithm.RC4 : EncryptionAlgorithm.AES;

        // set the encryption key size
        if (bit40RadioButton.Checked)
            htmlToPdfConverter.PdfSecurityOptions.KeySize = EncryptionKeySize.EncryptKey40Bit;
        else if (bit128RadioButton.Checked)
            htmlToPdfConverter.PdfSecurityOptions.KeySize = EncryptionKeySize.EncryptKey128Bit;
        else if (bit256RadioButton.Checked)
            htmlToPdfConverter.PdfSecurityOptions.KeySize = EncryptionKeySize.EncryptKey256Bit;
    }

    // Set user and owner passwords
    if (userPasswordTextBox.Text.Length > 0)
        htmlToPdfConverter.PdfSecurityOptions.UserPassword = userPasswordTextBox.Text;

    if (ownerPasswordTextBox.Text.Length > 0)
        htmlToPdfConverter.PdfSecurityOptions.OwnerPassword = ownerPasswordTextBox.Text;

    // Set PDF document permissions
    htmlToPdfConverter.PdfSecurityOptions.CanPrint = printEnabledCheckBox.Checked;
    htmlToPdfConverter.PdfSecurityOptions.CanPrintHighResolution = highResolutionPrintEnabledCheckBox.Checked;
    htmlToPdfConverter.PdfSecurityOptions.CanCopyContent = copyContentEnabledCheckBox.Checked;
    htmlToPdfConverter.PdfSecurityOptions.CanCopyAccessibilityContent = copyAccessibilityContentEnabledCheckBox.Checked;
    htmlToPdfConverter.PdfSecurityOptions.CanEditContent = editContentEnabledCheckBox.Checked;
    htmlToPdfConverter.PdfSecurityOptions.CanEditAnnotations = editAnnotationsEnabledCheckBox.Checked;
    htmlToPdfConverter.PdfSecurityOptions.CanFillFormFields = fillFormFieldsEnabledCheckBox.Checked;

    if ((PermissionsChanged(htmlToPdfConverter) || htmlToPdfConverter.PdfSecurityOptions.UserPassword.Length > 0) &&
        htmlToPdfConverter.PdfSecurityOptions.OwnerPassword.Length == 0)
    {
        // A user password is set but the owner password is not set or the permissions are not the default ones
        // Set a default owner password
        htmlToPdfConverter.PdfSecurityOptions.OwnerPassword = "owner";
    }

    // Convert the HTML page to a PDF document in a memory buffer
    byte[] outPdfBuffer = htmlToPdfConverter.ConvertUrl(urlTextBox.Text);

    // Send the PDF as response to browser

    // Set response content type
    Response.AddHeader("Content-Type", "application/pdf");

    // Instruct the browser to open the PDF file as an attachment or inline
    Response.AddHeader("Content-Disposition", String.Format("attachment; filename=Set_Permissions_Password.pdf; size={0}", outPdfBuffer.Length.ToString()));

    // Write the PDF document buffer to HTTP response
    Response.BinaryWrite(outPdfBuffer);

    // End the HTTP response and stop the current page processing
    Response.End();
}