2

目前我正在使用这个 JsonFormatter 将驼峰式数据发送到客户端

config.Formatters.JsonFormatter.SerializerSettings.ContractResolver =
                new CamelCasePropertyNamesContractResolver();

WebApiConfig

using Newtonsoft.Json;
using Newtonsoft.Json.Serialization;
using System.Web.Http;


namespace AlumCloud
{
    public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            // Web API configuration and services

            // Web API routes
            config.MapHttpAttributeRoutes();

            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );

            ((Newtonsoft.Json.Serialization.DefaultContractResolver)config.Formatters.JsonFormatter.SerializerSettings.ContractResolver).IgnoreSerializableAttribute = true;


            config.Formatters.JsonFormatter.SerializerSettings.ContractResolver =
            new CamelCasePropertyNamesContractResolver();
        }
    }
}

一切工作完美，我的数据按预期完美地在客户端接收。

现在，是时候开始向服务器发送数据了，我正在使用

C# Web Api in the .NET platform.

这是我尝试使用一个 C# 对象将骆驼大小写 JSON 数据发布到的 POST 函数，为了清楚起见，我删除了大部分代码。

WebApi 控制器 

namespace AlumCloud.Controllers
{
    [Authorize]
    public class HorizontalController : AlumCloudWebApiBaseController
    {
        public async Task<HttpResponseMessage> Post(Horizontal h)
        {
            string update = HttpContext.Current.Request.QueryString["a"];
            int ownerID = 0; ;
            HttpResponseMessage res = null;
            InsertHorizontalHelper insertRes = null;

            if (!int.TryParse(HttpContext.Current.Request.QueryString["id"], out ownerID))
            {
                return Request.CreateResponse(HttpStatusCode.NotFound, "Provide the id of the horizontal owner");
            };

            if (h.CompID < 1)
            {
                if (h.Sitelines.TopCompID > 0)
                {
                    h.CompID = h.Sitelines.TopCompID;
                };
            }
            switch (update)
            {

这是水平对象的属性的样子，它们是 Pascal Cased

C# 客户对象我想将属性从 JSON 映射到 C#

namespace CADDL.DataTransfer.Tables
{

    [XmlType(Namespace = "urn:DataObjects")]
    [XmlRoot(Namespace = "urn:DataObjects")]
    [Serializable]
    public class Horizontal : ColumnInfo, IHorizontal
    {


        [ColumnAttributes("ID", false, "int")]
        public int ID { get; set; }
        [ColumnAttributes("Position", false, "byte")]
        public byte Position { get; set; }
        [ColumnAttributes("Name", false, "string")]
        public string Name { get; set; }
        [ColumnAttributes("IsFiller", false, "bool")]
        public bool IsFiller { get; set; }
        [ColumnAttributes("HorizontalNote", false, "string")]
        public string HorizontalNote { get; set; }
        [ColumnAttributes("SizeID", false, "int")]
        public int SizeID { get; set; }
        [ColumnAttributes("WidthInches", false, "decimal")]
        public decimal WidthInches { get; set; }
        [ColumnAttributes("HeightInches", false, "decimal")]

我的错误

{"message":"An error has occurred.","exceptionMessage":"Object reference not set to an instance of an object.","exceptionType":"System.NullReferenceException","stackTrace":"   at AlumCloud.Controllers.HorizontalController.<Post>d__0.MoveNext() in D:\\Users\\Erik Little\\Documents\\visual studio 2015\\Projects\\AlumCloud\\AlumCloud\\Controllers\\CAD\\HorizontalController.cs:line 28\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Threading.Tasks.TaskHelpersExtensions.<CastToObject>d__3`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"}

我对小组的问题是。

  1. 为什么我的 Horizo​​ntal C# 对象总是 null 是因为 JSON 是 Camel 大小写，而它匹配的属性是 Pascal Cased？
  2. 从 JSON 到 C# 对象的属性映射器是否必须是相同的大小写才能设置值？
  3. 解决此问题的全局方法是什么，以便我不必在每个新的 Web Api 控制器中添加属性设置？

只是为了清楚起见，您在每个属性上看到的属性是针对我的数据层的，因为在请求数据时，它们不会在此实例中使用

4

1 回答 1

0

客户端接收对象并在服务器上处理对象的方式需要两个不同的对象以使生活更轻松，因此我创建了一个名为 client request 的文件夹，因此没有名称冲突我将 Horizo​​ntal 类命名为客户端大小 Horizo​​ntalRequest 但仅具有满足客户端所需的属性。

服务器上的类对象比接收 JSON 请求所需的要大一些，因此当客户端发送数据时，服务器对象比所需的大 20 倍，只是属性。

于 2016-10-16T03:51:24.407 回答