Sign documents with extra Digital Signature properties

GroupDocs.Signature contains DigitalSignatureAppearance class that implements extra settings for digital signature of Word Processing and Spreadsheets documents

Base signature options SignOptions property SignOptions.Appearance should be set with instance of DigitalSignatureAppearance class to provide additional digital signature look

Here are the steps to setup extra image appearance with GroupDocs.Signature:

Create new instance of Signature class and pass source document path as a constructor parameter.
Compose object ofDigitalSignatureAppearance object with all required additional options .
Set SignOptions.Appearance property with DigitalSignatureAppearance object and set its properties
Call Sign method of Signature class instance and pass SignOptions to it.
Analyze SignResult result to check newly created signatures if needed.

This example shows how to setup extra digital signature look. See SignResult

using (Signature signature = new Signature("sample.docs"))
{
    DigitalSignOptions options = new DigitalSignOptions("certificate.pfx")
    {
        // certifiate password
        Password = "1234567890",
        // digital certificate details
        Reason = "Sign",
        Contact = "JohnSmith",
        Location = "Office1",

        // image as digital certificate appearance on document pages
        ImageFilePath = imagePath,
        //                    
        AllPages = true,
        Width = 80,
        Height = 60,
        VerticalAlignment = VerticalAlignment.Bottom,
        HorizontalAlignment = HorizontalAlignment.Right,
        Margin = new Padding() { Bottom = 10, Right = 10 },
        // Setup signature line appearance.
        // This appearance will add Signature Line on the first page.
        // Could be useful for .xlsx files.
        Appearance = new DigitalSignatureAppearance("John Smith", "Title", "jonny@test.com")

    };
    signature.Sign("signed.docx", options);
}

Sign Pdf document with Text signature Sticker appearance

This example shows how to add Text signature to Pdf document with sticker look. See SignResult

using (Signature signature = new Signature("sample.docx"))
{
    TextSignOptions options = new TextSignOptions("John Smith")
    {
        // set signature position 
        Left = 100,
        Top = 100,
        // set signature rectangle
        Width = 100,
        Height = 30,
        // setup proper signature implementation
        SignatureImplementation = TextSignatureImplementation.Sticker,
        Appearance = new PdfTextStickerAppearance()
        {
            // select sticker icon
            Icon = PdfTextStickerIcon.Star,
            // setup if popup annotation will be opened by default
            Opened = false,
            // text content of an annotation
            Contents = "Sample",
            Subject = "Sample subject",
            Title = "Sample Title"
        },
        // set signature alignment
        VerticalAlignment = Domain.VerticalAlignment.Bottom,
        HorizontalAlignment = Domain.HorizontalAlignment.Right,
        Margin = new Padding() { Bottom = 20, Right = 20 },
        // set text color and Font
        ForeColor = Color.Red,
        Font = new SignatureFont { Size = 12, FamilyName = "Comic Sans MS" },
    };
    // sign document to file
    signature.Sign("signed.docx", options);
}

More resources

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online App

Along with full-featured .NET library we provide simple, but powerful free Apps.
You are welcome to eSign PDF, Word, Excel, PowerPoint documents with free to use online GroupDocs Signature App.

Sign documents with additional image adjustments Sign Pdf documents with special appearance