我正在使用API​​从页面发送数据。如果我发送的是ASCII格式的数据，则一切正常，但如果从UTF-8发送数据，则参数FromBody返回Nothing。

我的控制器：

Public Function AddContacts(PartnerId As Long,<FromBody()> ByVal value As Json.Contacts) As HttpResponseMessage
  Dim liErr As New List(Of API.Universal.Json.MyError)

  If PostData.SaveContacts(PartnerId,value,liErr,_Conn.Connection) Then
    Return Request.CreateResponse(HttpStatusCode.accepted,New API.Universal.Json.MyErrors(liErr.ToArray))
  Else
    Return Request.CreateResponse(HttpStatusCode.OK,New API.Universal.Json.MyErrors(liErr.ToArray))
  End If
End Function

我的帖子数据：

Content-Type: application/json; charset=utf-8

{
"txtFirstName": "","txtLastName": "","txtAddress": "","txtCity": "","txtPostalCode": "","cmbCountry": "","txtPhone": "","txtEmail": "mail@ss.sd","cmbLanguage": "CS","txtNote": "testovací poznámka"
}