Why doesn't latest version of pdf have a visible signature, only blank fields

Question

I'm C# user and tried both createUrlWidget and createPersonalUrlWidget to send a test document, and after it signed by signer, I used both getLatestDocument and getDocuments, but only get a pdf without seeing signature like this:
I can get signed doc using the link in email sent to signer:
So, I'm confused, can anybody answer me where did I missed?
1. the method I used to create url widget:
public static bool createUrlWidget(string fileName)
            FileStream file = File.OpenRead(fileName);
            com.echosign.secure.FileInfo[] fileInfos = new com.echosign.secure.FileInfo[1];
            fileInfos[0] = new com.echosign.secure.FileInfo(fileName, null, file);
            SenderInfo senderInfo = null;
            //string[] recipients = new string[1];
            //recipients[0] = recipient;
            RecipientInfo[] recipients = new RecipientInfo[1];
            recipients[0] = new RecipientInfo();
            recipients[0].email = "[email protected]";
            RecipientRole role = new RecipientRole();
            role = RecipientRole.SIGNER;
            recipients[0].role = role;
            WidgetCreationInfo widgetInfo = new WidgetCreationInfo();
            widgetInfo.name = "Test Docx";
            widgetInfo.fileInfos = fileInfos;
            //widgetInfo.counterSigners = recipients;
            WidgetPersonalizationInfo personInfo = new WidgetPersonalizationInfo();
            personInfo.comment = "Test sign of doc";
            personInfo.email = recipients[0].email;
            personInfo.reusable = false;
            UrlWidgetCreationResult result = ES.createPersonalUrlWidget(APIKey, senderInfo, widgetInfo, personInfo);// ES.createUrlWidget(APIKey, senderInfo, widgetInfo);
            if (result.success)
                DocumentKey2 = result.documentKey;
                urlWidgetReturn = result.url;
            else
                return false;
            return true;
2. the method I get the documents, there's only 1 content in returned DocumentContent[]:
public static void getDocuments(string documentKey)
            GetDocumentsOptions opts = new GetDocumentsOptions();
            //opts.versionKey = "latest version";
            //opts.participantEmail = "[email protected]";
            opts.combine = true;
            opts.attachSupportingDocuments = true;
            GetDocumentsResult result  = ES.getDocuments(APIKey, documentKey, opts);
            if (result.success)
                DocumentContent[] contents = result.documents;
                foreach (DocumentContent dc in contents)
                    FileStream file = File.OpenWrite(string.Format("c:\\{0}.pdf", Guid.NewGuid()));
                    file.Write(dc.bytes, 0, dc.bytes.Length);
This is my first time to use this api, so maybe I missed some important steps to cause this. I appreciate anybody which could see this and help me.
Thanks a lot!
Kenny

Answer 1

I figured it out myself, I should use the shorter keys parsing from formDataCsv in GetFormDataResult to retrieve the latest version.