jQuery传送JSON給ASP.NET MVC

比眉伴天荒 2022-08-08 13:55 52阅读 0赞

原文：[http://blog.darkthread.net/post-2015-05-11-post-json-to-mvc-action-again.aspx][http_blog.darkthread.net_post-2015-05-11-post-json-to-mvc-action-again.aspx]

using Newtonsoft.Json;
    using Newtonsoft.Json.Linq;
    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Net.Http;
    using System.Net.Http.Formatting;
    using System.Web.Http.Controllers;
    using System.Web.Http.Validation;
    using System.Web.Mvc;
     
    namespace Afet.Mvc
    {
        [AttributeUsage(AttributeTargets.Parameter)]
        public class FromBodyAttribute : CustomModelBinderAttribute
        {
            protected bool DictionaryMode = false;
     
            public FromBodyAttribute(bool dictionaryMode = false)
            {
                this.DictionaryMode = dictionaryMode;
            }
     
            public override IModelBinder GetBinder()
            {
                return new JsonNetBinder(DictionaryMode);
            }
     
            public class JsonNetBinder : IModelBinder
            {
     
                private bool DictionaryMode;
                public JsonNetBinder(bool dictionaryMode)
                {
                    this.DictionaryMode = dictionaryMode;
                }
     
                const string VIEW_DATA_STORE_KEY = "___BodyJsonString";
     
                public object BindModel(ControllerContext controllerContext,
                    ModelBindingContext bindingContext)
                {
                    //Verify content-type
                    if (!controllerContext.HttpContext.Request.
                        ContentType.ToLower().Contains("json"))
                        return null;
                    var stringified = controllerContext.Controller
                                    .ViewData[VIEW_DATA_STORE_KEY] as string;
                    if (stringified == null)
                    {
                        var stream = controllerContext.HttpContext.Request.InputStream;
                        using (var sr = new StreamReader(stream))
                        {
                            stream.Position = 0;
                            stringified = sr.ReadToEnd();
                            controllerContext.Controller
                                .ViewData.Add(VIEW_DATA_STORE_KEY, stringified);
                        }
                    }
                    if (string.IsNullOrEmpty(stringified)) return null;
     
                    try
                    {
                        if (DictionaryMode)
                        {
                            //Find the property form JObject converted from body
                            var dict = JsonConvert.DeserializeObject<JObject>(stringified);
                            if (dict.Property(bindingContext.ModelName) == null)
                                return null;
                            //Convert the property to ModelType
                            return dict.Property(bindingContext.ModelName).Value
                                .ToObject(bindingContext.ModelType);
                        }
                        else
                        {
                            //Convert the whole body to ModelType
                            return JsonConvert.DeserializeObject(stringified,
                                bindingContext.ModelType);
                        }
                    }
                    catch
                    {
     
                    }
                    return null;
                }
            }
        }
     
        [AttributeUsage(AttributeTargets.Parameter)]
        public sealed class FromPartialBodyAttribute : FromBodyAttribute
        {
            public FromPartialBodyAttribute()
                : base(true)
            {
            }
        }
    }

eg:

public ActionResult PostJson2(
                [Afet.Mvc.FromBody]ArgObject args)
            {
                return new Newtonsoft.JsonResult.JsonResult()
                {
                    Data = args
                };
            }
     
            public ActionResult PostJson3(
                [Afet.Mvc.FromPartialBody]string Name,
                [Afet.Mvc.FromPartialBody]SubArgObject SubArg
                )
            {
                return new Newtonsoft.JsonResult.JsonResult()
                {
                    Data = new
                    {
                        ParamName = Name,
                        ParamSubArg = SubArg
                    }
                };
            }

public class ArgObject
        {
            public string Name { get; set; }
            public SubArgObject SubArg { get; set; }
        }
     
        public class SubArgObject
        {
            public string PropA { get; set; }
            [JsonProperty("PropX")]
            public string PropB { get; set; }
            [JsonIgnore]
            public string PropC { get; set; }
        }

参考资料： [http://www.asp.net/web-api/overview/formats-and-model-binding/parameter-binding-in-aspnet-web-api][http_www.asp.net_web-api_overview_formats-and-model-binding_parameter-binding-in-aspnet-web-api]

[http_blog.darkthread.net_post-2015-05-11-post-json-to-mvc-action-again.aspx]: http://blog.darkthread.net/post-2015-05-11-post-json-to-mvc-action-again.aspx
[http_www.asp.net_web-api_overview_formats-and-model-binding_parameter-binding-in-aspnet-web-api]: http://www.asp.net/web-api/overview/formats-and-model-binding/parameter-binding-in-aspnet-web-api