问题描述

我下载了 webapi 的示例代码，我得到了这个异常我使用 Visual Studio 2012 Ultimate Version 打开了这个示例，并且我安装了最新版本的 newtonsoft.运行此应用程序时出现此错误.编译成功.知道为什么会出现这个错误，有没有办法解决这个异常.

I downloaded a sample code for webapi and I am getting this exception I opened this sample using Visual Studio 2012 Ultimate Version and I have latest verion of newtonsoft installed.I am getting this error when I run this application.Its compiling successfully. Any idea why this error and is there a way to resolve this exception.

System.MissingMethodException was unhandled by user code
  HResult=-2146233069
  Message=Method not found: 'Void Newtonsoft.Json.Serialization.DefaultContractResolver.set_IgnoreSerializableAttribute(Boolean)'.
  Source=System.Net.Http.Formatting
  StackTrace:
       at System.Net.Http.Formatting.JsonContractResolver..ctor(MediaTypeFormatter formatter)
       at System.Net.Http.Formatting.JsonMediaTypeFormatter..ctor()
       at System.Net.Http.Formatting.MediaTypeFormatterCollection.CreateDefaultFormatters()
       at System.Net.Http.Formatting.MediaTypeFormatterCollection..ctor()
       at System.Web.Http.HttpConfiguration.DefaultFormatters()
       at System.Web.Http.HttpConfiguration..ctor(HttpRouteCollection routes)
       at System.Web.Http.GlobalConfiguration.<.cctor>b__0()
       at System.Lazy`1.CreateValue()
       at System.Lazy`1.LazyInitValue()
       at System.Lazy`1.get_Value()
       at System.Web.Http.GlobalConfiguration.get_Configuration()
       at System.Web.Http.RouteCollectionExtensions.MapHttpRoute(RouteCollection routes, String name, String routeTemplate, Object defaults, Object constraints, HttpMessageHandler handler)
       at System.Web.Http.RouteCollectionExtensions.MapHttpRoute(RouteCollection routes, String name, String routeTemplate, Object defaults)
       at WebAPIRc.RouteConfig.RegisterRoutes(RouteCollection routes) in c:UsersviemonDownloadsWebAPIRcWebAPIRcWebAPIRcApp_StartRouteConfig.cs:line 17
       at WebAPIRc.WebApiApplication.Application_Start() in c:UsersviemonDownloadsWebAPIRcWebAPIRcWebAPIRcGlobal.asax.cs:line 36
  InnerException: 

这是失败的代码

public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
          //Exception error start
            routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );
          //exception error end

            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
            );
        }
    }

我知道我需要为 NuGet 打开包含预发布"来自这篇文章，但是如何开启如何开启 NuGet 的Include Prerelease"?

I came to know that I need to turn on "Include prerelease" for NuGet from this post, but how do I turn on how to turn on the "Include Prerelease" for NuGet ?

推荐答案

如何开启如何开启 NuGet 的包括预发布"?

how do I turn on how to turn on the "Include Prerelease" for NuGet ?

要使用包含预发行版" 安装 Json.NET，请在 包管理器控制台

To install Json.NET with "Include Prerelease", run the following command in the Package Manager Console

Install-Package Newtonsoft.Json –IncludePrerelease

这篇关于找不到方法'无效 Newtonsoft.Json.Serialization.DefaultContractResolver.set_IgnoreSerializableAttribute(Boolean)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！