Delete Signatures of the certain types

GroupDocs.Signature provides overloaded Delete method that accepts list of the SignatureType enumeration values. Please be aware that this method modifies the same document that was passed to constructor of the Signature class.

Here are the steps to delete signature by certain types from the document with GroupDocs.Signature:

  • Create new instance of Signature class and pass source document path or its stream as a constructor parameter;
  • Call Signature object Delete method and pass list of the required SignatureType enumerations to it.

This example shows how to delete various signatures types from the document at once.

using (Signature signature = new Signature("signed.pdf"))
{
    // compose the list of signature types to delete
    var signedTypes = new List<SignatureType>
    {
        SignatureType.Text, 
        SignatureType.Image,
        SignatureType.Barcode,
        SignatureType.QrCode,
        SignatureType.Digital
    };
    // deleting QR-Code signatures from the document by signature types
    DeleteResult result = signature.Delete(signedTypes);
    if (result.Succeeded.Count > 0)
    {
        Console.WriteLine("Following signatures were removed:");
        int number = 1;
        foreach (BaseSignature temp in result.Succeeded)
        {
            Console.WriteLine($"Signature #{number++}: Type: {temp.SignatureType} Id:{temp.SignatureId}. Created: {temp.CreatedOn.ToShortDateString()}");
        }
    }
    else
    {
        Helper.WriteError("No one signature was deleted.");
    }
}

Advanced Usage Topics

To learn more about document eSign features, please refer to the Advanced usage section.

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.