在调用POST函数发送数据时，需要确认发送的数据格式是否符合服务器端所需的格式要求。此外，还需要对服务器端设置错误处理程序，以方便查看是否出现了错误并采取相应措施。以下是示例代码：

//发送POST请求 var request = (HttpWebRequest)WebRequest.Create("http://example.com/api/data"); request.Method = "POST"; request.ContentType = "application/json";

//设置要发送的数据 var data = new { name = "John", age = 30 }; var json = JsonConvert.SerializeObject(data); var bytes = Encoding.UTF8.GetBytes(json); request.ContentLength = bytes.Length; using (var stream = request.GetRequestStream()) { stream.Write(bytes, 0, bytes.Length); }

//获取响应信息 try { using (var response = (HttpWebResponse)request.GetResponse()) using (var reader = new StreamReader(response.GetResponseStream())) { var result = reader.ReadToEnd(); Console.WriteLine(result); } } catch (WebException ex) { //处理服务器端返回的异常信息 using (var reader = new StreamReader(ex.Response.GetResponseStream())) { var error = reader.ReadToEnd(); Console.WriteLine(error); } }