ASP.NET MVC(post数据)Json请求太大,无法反序列化（The JSON request was too large to be deserialized）

解决方法：

方案1.asp.net mvc默认的json序列化ValueProviderFactory使用的是javascriptserializer，可以在配置文件web.config中设置：

<add key="aspnet:MaxJsonDeserializerMembers" value="150000000" />

和

<system.web.extensions><scripting><webServices><jsonSerialization maxJsonLength="2147483644"/></webServices></scripting></system.web.extensions>

方案2：重写默认的ValueProviderFactory，继承ValueProviderFactory抽象类使用json.net替换javascriptserializer，并且在application_start时将默认的ValueProviderFactory移除，使用自定义的ValueProviderFactory

 1 public sealed class JsonDotNetValueProviderFactory : ValueProviderFactory 2   { 3    public override IValueProvider GetValueProvider(ControllerContext controllerContext) 4     { 5       if (controllerContext == null) 6         throw new ArgumentNullException("controllerContext"); 7        8       if (!controllerContext.HttpContext.Request.ContentType.StartsWith("application/json", StringComparison.OrdinalIgnoreCase)) 9         return null;10 11       var reader = new StreamReader(controllerContext.HttpContext.Request.InputStream);12       var bodyText = reader.ReadToEnd();13 14       return String.IsNullOrEmpty(bodyText) ? null : new DictionaryValueProvider<object>(JsonConvert.DeserializeObject<ExpandoObject>(bodyText, new ExpandoObjectConverter()) , CultureInfo.CurrentCulture);15     }16   }

global.asax

 1 protected void Application_Start() 2     { 3       log4net.Config. 4       AreaRegistration.RegisterAllAreas(); 5       GlobalConfiguration.Configure(WebApiConfig.Register); 6       FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters); 7       RouteConfig.RegisterRoutes(RouteTable.Routes); 8       BundleConfig.RegisterBundles(BundleTable.Bundles); 9       ValueProviderFactories.Factories.Remove(ValueProviderFactories.Factories.OfType<JsonValueProviderFactory>().FirstOrDefault());10       ValueProviderFactories.Factories.Add(new JsonDotNetValueProviderFactory());11       //AutofacBuilder<ModulesRepository>.RegisterPersistent();12     }

网上介绍最多的是第一种方案，但是我觉得json.net比默认的javascriptserializer性能要好所以采用第二种方案！

原标题：ASP.NET MVC(post数据)Json请求太大,无法反序列化（The JSON request was too large to be deserialized）

关键词：ASP.NET