问题描述
我无法在 Unity 中使用 UnityWebRequest 以 Json 格式发布数据。它给出了错误
我使用的是在 ASP.NET Core 中制作并在 IIS Express 上本地托管的 Web 服务。
这是我在 Unity 中的 C# 代码
public class AddUsers : MonoBehavIoUr
{
IEnumerator addOrUpdateUser()
{
User user = new User()
{
Id = "0001",Name = "John",}
UnityWebRequest req = UnityWebRequest.Post("http://localhost:58755/User/AddNewUser",JsonConvert.SerializeObject(user));
req.SetRequestHeader("Content-Type","application/json");
req.certificateHandler = new BypassCertificate();
yield return req.SendWebRequest();
if (req.isNetworkError || req.isHttpError || req.isError)
print("Error: " + req.error);
print(req.downloadHandler.text);
}
}
[Serializable]
public class UserDetails
{
public string Id { get; set; }
public string Name { get; set; }
}
这是我使用 Entity Framework Core 的 ASP.NET Core 代码
[HttpPost]
string AddNewUser([FromBody]User user)
{
Context.logoQuizUsers.Add(user); // I am getting System.NullReferenceException here
Context.SaveChanges();
return "Inserted Id: " + user.Id;
}
解决方法
将数据作为原始数据发布 - 正文,就像您使用 Postman 或任何类似界面发送一样。
将请求的 UploadHandler
设置为 UploadHandlerRaw
。添加和更改您的声明
UnityWebRequest req = UnityWebRequest.Post("http://localhost:58755/User/AddNewUser","POST");
req.uploadHandler = new UploadHandlerRaw(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(user))) as UploadHandler;
因此最终代码将是
IEnumerator addOrUpdateUser()
{
//...
UnityWebRequest req = UnityWebRequest.Post("http://localhost:58755/User/AddNewUser","POST");
req.SetRequestHeader("Content-Type","application/json");
req.uploadHandler = new UploadHandlerRaw(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(user))) as UploadHandler;
req.certificateHandler = new BypassCertificate();
yield return req.SendWebRequest();
if (req.isNetworkError || req.isHttpError || req.isError)
print("Error: " + req.error);
print(req.downloadHandler.text);
//...
}
其余代码是正确的。