Getting error while using DocuSign in DotNet application - asp.net-mvc

Question

I am implementing the DocuSign functionality in my application to sign the PDF.
I am following the below link:
https://www.docusign.com/developer-center/api-overview
We are able to add signature in the PDF while using the steps mentioned in the above link but while calling the same method for second time to signed a new PDF we are getting error message at the line of CreateEnvelope()
Error Response: { "errorCode": "UNSPECIFIED_ERROR", "message":
"Input string was not in a correct format." }
it generate an error while Creating envelop. at this line
EnvelopeSummary envelopeSummary = envelopesApi.CreateEnvelope(accountId, envDef);
Below is the code which i use
static string userName = Utility.GetConfigValue("docSignUserName");
static string password = Utility.GetConfigValue("docSignPassword");
static string integratorKey = Utility.GetConfigValue("docSignIntegratorKey");
static string baseURL = "";
public static SignedPDF SignDocument(UserViewModel user, StateViewModel state, string signFilePath, string newFilePath, string controlSign)
{
PdfReader pdfReader = new PdfReader(signFilePath);
PdfReader newpdfReader = new PdfReader(newFilePath);
PdfStamper pdfStamper = new PdfStamper(newpdfReader, new FileStream(HttpContext.Current.Server.MapPath(Utility.GetConfigValue("StateTaxForms")) + "Test.pdf", FileMode.Create));
AcroFields pdfFormFields = pdfStamper.AcroFields;
IList<AcroFields.FieldPosition> fieldPositions = pdfFormFields.GetFieldPositions(controlSign);
try
{
AcroFields.FieldPosition fieldPosition = fieldPositions[0];
// Enter recipient (signer) name and email address
string recipientName = user.FirstName + " " + user.LastName;
string recipientEmail = user.Email;
// instantiate api client with appropriate environment (for production change to www.docusign.net/restapi)
string basePath = Utility.GetConfigValue("docSignInstantiateClient");
// instantiate a new api client
ApiClient apiClient = new ApiClient(basePath);
// set client in global config so we don't need to pass it to each API object
Configuration.Default.ApiClient = apiClient;
string authHeader = "{\"Username\":\"" + userName + "\", \"Password\":\"" + password + "\", \"IntegratorKey\":\"" + integratorKey + "\"}";
Configuration.Default.AddDefaultHeader("X-DocuSign-Authentication", authHeader);
// we will retrieve this from the login() results
string accountId = null;
// the authentication api uses the apiClient (and X-DocuSign-Authentication header) that are set in Configuration object
AuthenticationApi authApi = new AuthenticationApi();
LoginInformation loginInfo = authApi.Login();
// user might be a member of multiple accounts
accountId = loginInfo.LoginAccounts[0].AccountId;
// Read a file from disk to use as a document
byte[] fileBytes = File.ReadAllBytes(signFilePath);
EnvelopeDefinition envDef = new EnvelopeDefinition();
envDef.EmailSubject = "Please sign this document";
// Add a document to the envelope
Document doc = new Document();
doc.DocumentBase64 = System.Convert.ToBase64String(fileBytes);
doc.Name = "SignedFile.pdf";
doc.DocumentId = "1";
envDef.Documents = new List<Document>();
envDef.Documents.Add(doc);
// Add a recipient to sign the documeent
Signer signer = new Signer();
signer.Name = recipientName;
signer.Email = recipientEmail;
signer.RecipientId = "1";
// must set |clientUserId| to embed the recipient
signer.ClientUserId = "1234";
// Create a |SignHere| tab somewhere on the document for the recipient to sign
signer.Tabs = new Tabs();
signer.Tabs.SignHereTabs = new List<SignHere>();
SignHere signHere = new SignHere();
var height = pdfReader.GetPageSize(1).Height;
signHere.DocumentId = "1";
signHere.RecipientId = "1";
signHere.PageNumber = Convert.ToInt32(fieldPosition.page).ToString();
signHere.XPosition = Convert.ToInt32(fieldPosition.position.Left).ToString();
if (state.Abbreviation == "DC" && controlSign != "Signature of Employee")
{
signHere.YPosition = (height - Convert.ToInt32(fieldPosition.position.Top - 5)).ToString();
}
else
{
signHere.YPosition = (height - Convert.ToInt32(fieldPosition.position.Top + 35)).ToString();
}
if (state.Abbreviation == "NC" && controlSign != "Signature of Employee")
{
signHere.YPosition = (height - Convert.ToInt32(fieldPosition.position.Top + 25)).ToString();
}
signer.Tabs.SignHereTabs.Add(signHere);
envDef.Recipients = new Recipients();
envDef.Recipients.Signers = new List<Signer>();
envDef.Recipients.Signers.Add(signer);
// set envelope status to "sent" to immediately send the signature request
envDef.Status = "sent";
// Use the EnvelopesApi to create and send the signature request
EnvelopesApi envelopesApi = new EnvelopesApi();
EnvelopeSummary envelopeSummary = envelopesApi.CreateEnvelope(accountId, envDef);
RecipientViewRequest viewOptions = new RecipientViewRequest()
{
ReturnUrl = Utility.GetConfigValue("docSignReturnURL"),
ClientUserId = "1234", // must match clientUserId set in step #2!
AuthenticationMethod = "email",
UserName = recipientName,
Email = recipientEmail
};
// create the recipient view (aka signing URL)
ViewUrl recipientView = envelopesApi.CreateRecipientView(accountId, envelopeSummary.EnvelopeId, viewOptions);
// Start the embedded signing session!
//var value = System.Diagnostics.Process.Start(recipientView.Url);
SignedPDF signedPDF = new SignedPDF();
signedPDF.URL = recipientView.Url;
signedPDF.EnvelopeID = envelopeSummary.EnvelopeId;
return signedPDF;
}
catch (Exception ex)
{
throw new PDFSignException(ErrorConstants.THERE_WAS_AN_ERROR_WHILE_SIGNING_PDF);
}
finally
{
pdfStamper.Close();
pdfReader.Close();
}
}
Hi CodingDawg this is the JSON
{
"documents": [
{
"documentBase64": "",
"documentId": "1",
"name": "SignedFile.pdf"
}
],
"emailSubject": "Please sign this document",
"recipients": {
"signers": [
{
"clientUserId": "1234",
"email": "sagar.mali#tudip.com",
"name": "Sagar Mali",
"recipientId": "1",
"tabs": {
"signHereTabs": [
{
"documentId": "1",
"pageNumber": "1",
"recipientId": "1",
"xPosition": "192",
"yPosition": "679.968"
}
]
}
}
]
},
"status": "sent"
}
We have removed the base 64 string as the length was not supporting.

Answer 1

Make sure the signHere.XPosition & signHere.YPosition values are passed correctly.
The following statement could evaluate to a decimal value. Make sure it is an integer.
signHere.YPosition = (height - Convert.ToInt32(fieldPosition.position.Top + 25)).ToString();
Troubleshooting Step
Please run envelopeDefinition.ToJson() (Sdk documentation) and make sure the final Json posted to the DocuSign api is correct.