AddCustomField 在 HelloSignAPI 中不起作用

如何解决AddCustomField 在 HelloSignAPI 中不起作用

文本框中未填充该值。文本框名称的分配类似于 Hellosign 模板中的 FullName 和 Company。然后添加如下代码，即使文本框中未填充值..
请帮助解决这个问题.. 提前感谢..

var request = new TemplateSignatureRequest();
request.AddTemplate(templateID);
request.Title = "Test Development";
request.Subject = "REG : Test Generate Document";
request.Message = "Please review these three contracts and sign them at your earliest convenience.";
request.AddSigner("Client",signer.Email,signer.Name);
request.AddCustomField("FullName","Test Development 2021");
request.AddCustomField("Company","123 Main St,Anytown,ST 12345");
request.TestMode = true;
var response = client.SendSignatureRequest(request);