How to download files from Docusign api using vb.net - vb.net

Question

How to download files once signed by all using vb.net. I manged to send envelope with template id.So i want to get back that file using envelope id, pls provide some sampe code to retrieve back files using vb.net.
Here code what i used in vb.net
Private Function DoWnload(ByVal accessToken As String, ByVal basePath As String, ByVal accountId As String, ByVal envelopeId As String, ByVal documents As List(Of EnvelopeDocItem), ByVal docSelect As String) As String
Dim config = New Configuration(New ApiClient(basePath))
config.AddDefaultHeader("Authorization", "Bearer " & accessToken)
Dim envelopesApi As EnvelopesApi = New EnvelopesApi(config)
Dim results As System.IO.Stream = envelopesApi.GetDocument(accountId, envelopeId, docSelect)
Dim docItem As EnvelopeDocItem = documents.FirstOrDefault(Function(d) docSelect.Equals(d.DocumentId))
Dim docName As String = docItem.Name
Dim hasPDFsuffix As Boolean = docName.ToUpper().EndsWith(".PDF")
Dim pdfFile As Boolean = hasPDFsuffix
Dim docType As String = docItem.Type
If ("content".Equals(docType) OrElse "summary".Equals(docType)) AndAlso Not hasPDFsuffix Then
docName += ".pdf"
pdfFile = True
End If
If "zip".Equals(docType) Then
docName += ".zip"
End If
Dim mimetype As String
If pdfFile Then
mimetype = "application/pdf"
ElseIf "zip".Equals(docType) Then
mimetype = "application/zip"
Else
mimetype = "application/octet-stream"
End If
''Dim f1 As FileStream = New FileStream("sample.txt", FileMode.OpenOrCreate, FileAccess.ReadWrite)
' Return File(results, mimetype, docName)
Dim bytesRead As Integer
Dim buffer(4096) As Byte
Using outFile As New System.IO.FileStream("C:\File.pdf", IO.FileMode.Create, IO.FileAccess.Write)
Do
bytesRead = results.Read(buffer, 0, buffer.Length)
If bytesRead > 0 Then
outFile.Write(buffer, 0, bytesRead)
End If
Loop While bytesRead > 0
End Using
Return ""
End Function
Dim envelopeDocItems As List(Of EnvelopeDocItem) = New List(Of EnvelopeDocItem) From {
New EnvelopeDocItem With {
.Name = "Combined",
.Type = "content",
.DocumentId = "combined"
},
New EnvelopeDocItem With {
.Name = "Zip archive",
.Type = "zip",
.DocumentId = "archive"
}
in that docSelect what need to pass ? i passed documetid, getting error.
Regards,
Aravind

Answer 1

Private Function DoWork(ByVal accessToken As String, ByVal basePath As String, ByVal accountId As String, ByVal envelopeId As String, ByVal documents As List(Of EnvelopeDocItem), ByVal docSelect As String) As FileStreamResult
Dim config = New Configuration(New ApiClient(basePath))
config.AddDefaultHeader("Authorization", "Bearer " & accessToken)
Dim envelopesApi As EnvelopesApi = New EnvelopesApi(config)
Dim results As System.IO.Stream = envelopesApi.GetDocument(accountId, envelopeId, docSelect)
Dim docItem As EnvelopeDocItem = documents.FirstOrDefault(Function(d) docSelect.Equals(d.DocumentId))
Dim docName As String = docItem.Name
Dim hasPDFsuffix As Boolean = docName.ToUpper().EndsWith(".PDF")
Dim pdfFile As Boolean = hasPDFsuffix
Dim docType As String = docItem.Type
If ("content".Equals(docType) OrElse "summary".Equals(docType)) AndAlso Not hasPDFsuffix Then
docName += ".pdf"
pdfFile = True
End If
If "zip".Equals(docType) Then
docName += ".zip"
End If
Dim mimetype As String
If pdfFile Then
mimetype = "application/pdf"
ElseIf "zip".Equals(docType) Then
mimetype = "application/zip"
Else
mimetype = "application/octet-stream"
End If
Return File(results, mimetype, docName)
End Function
You will need to get the nuget from here - https://www.nuget.org/packages/DocuSign.eSign.dll/ but version 5.0.0 won't work with the code above, use version 4.3
Update: adding this additional class:
Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Threading.Tasks
Namespace Models
Public Class EnvelopeDocItem
Public Property Name As String
Public Property Type As String
Public Property DocumentId As String
End Class
End Namespace