XpsSignatureDefinition.SpotLocation - 它是如何工作的？

Question

SpotLocation 是如何工作的？以下代码不会在现场位置的固定页面上显示数字签名请求（DSR）。 DSR应该自动出现在页面的现场位置，还是我必须定义签名图片，文本和按钮并将其放置在xps页面上？

...
XpsSignatureDefinition newSign = new XpsSignatureDefinition();
newSign.Intent = "I am the author of this document.";
newSign.RequestedSigner = "Jonnie ";
newSign.SigningLocale = "Richmond";

newSign.SpotLocation = new SpotLocation();
newSign.SpotLocation.PageUri 
    = PackUriHelper.CreatePartUri(new Uri(@"/Documents/1/Pages/1.fpage",UriKind.Relative));
newSign.SpotLocation.StartX = 30.00;
newSign.SpotLocation.StartY = 30.00;

newSign.SignBy = DateTime.Now + new TimeSpan(10, 0, 0, 0);
Guid g = System.Guid.NewGuid();
newSign.SpotId = g;

XpsDocument document = new XpsDocument(package);
IXpsFixedDocumentSequenceReader docSeqReader = document.FixedDocumentSequenceReader;

docSeqReader.FixedDocuments[0].AddSignatureDefinition(newSign);
docSeqReader.FixedDocuments[0].CommitSignatureDefinition();
....

Answer 1

Microsoft 的 XPS 查看器不支持将签名请求放置在特定位置（例如，由现场 ID 指定的位置）。