AutoFill DocuSign Text Fields with c# SDK - docusignapi

Question

I am using the DocuSign c# SDK and am trying to auto-populate text fields in a DocuSign template with values from an HTML form. I can get the FullName and Email fields to populate as I believe that information is being passed via TemplateRole. However, I can't seem to find an example of how to pass information into a custom field I have created. Everything I can find is pure JSON requests. I assume there has to be methods within the SDK to handle this. Any ideas? Thanks!
public EnvelopeSummary CreateEnvelopeFromTemplate(LoanApplicationModel model)
{
EnvelopeDefinition envDef = new EnvelopeDefinition();
envDef.EmailSubject = "DocuSign Test - Please sign this document";
TemplateRole tRole = new TemplateRole();
tRole.Email = model.Email;
tRole.Name = model.FirstName + " " + model.LastName;
tRole.RoleName = "Client";
List<TemplateRole> rolesList = new List<TemplateRole>() {tRole};
envDef.TemplateRoles = rolesList;
envDef.TemplateId = "*******";
envDef.Status = "sent";
EnvelopesApi envelopesApi = new EnvelopesApi();
EnvelopeSummary envelopeSummary = envelopesApi.CreateEnvelope(accountId, envDef);
Console.WriteLine("EnvelopeSummary:\n{0}", JsonConvert.SerializeObject(envelopeSummary));
Trace.WriteLine("Envelope has been sent to " + tRole.Email);
return envelopeSummary;
}

Answer 1

Inside TemplateRole, you need to use Tabs, and if you need to populate for instance TextTab, then you need to add textTab like below to your tRole and the TabLabel of the TextTab should match exactly whats present in your template.
tRole.Tabs = new Tabs();
tRole.Tabs.Text = new List<Text>();
Text text = new Text();
text.TabLabel = "<Template_DataLabel>";
text.Value = "<Value_which_you_want_to_prepoulate>";
tRole.Tabs.Text.Add(text);