.net core 1.1.0 MVC 控制器接收Json字串 （JObject对象） (一）

.net core 1.1.0 MVC 控制器接收Json字串 （JObject对象） (二）

    Json是WEB交互常见的数据，.net core 处理方式是转为强类型，没有对应的强类型会被抛弃，有时我们想自己在后台处理就想获得原始Json串，但.net core客户端的请求进行了默认的封装和转换。浏览器请求get,post，get不发Json,post发送请求有Form键值方式和Body数据方式，把键值对转成Json相对容易，这也是系列（一）的内容。

   直接来思路，首先定义自己的ModelBinderProvider 如下：

?

1 2 3 4 5 6 7 8 9 10 11 12

public class JObjectModelBinderProvider : IModelBinderProvider    {        public IModelBinder GetBinder(ModelBinderProviderContext context)        {            if (context == null) throw new ArgumentNullException(nameof(context));            if (context.Metadata.ModelType == (typeof(JObject)))            {                return new JObjectModelBinder(context.Metadata.ModelType);            }            return null;        }    }

 

接着编写对应的ModelBinder

 

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

public class JObjectModelBinder : IModelBinder     {         public JObjectModelBinder(Type type)         {             if (type == null)             {                 throw new ArgumentNullException("type");             }         }         public Task BindModelAsync(ModelBindingContext bindingContext)         {             if (bindingContext == null) throw new ArgumentNullException("bindingContext");             ValueProviderResult result = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);             try             {                 JObject obj = new JObject();                 if (bindingContext.ModelType == typeof(JObject))                 {                     foreach (var item in bindingContext.ActionContext.HttpContext.Request.Form)                     {                         obj.Add(new JProperty(item.Key.ToString(), item.Value.ToString()));                     }                     if ((obj.Count == 0))                     {                         bindingContext.ModelState.TryAddModelError(bindingContext.ModelName, bindingContext.ModelMetadata.ModelBindingMessageProvider.ValueMustNotBeNullAccessor(result.ToString()));                         return Task.CompletedTask;                     }                     bindingContext.Result = (ModelBindingResult.Success(obj));                     return Task.CompletedTask;                 }                 return Task.CompletedTask;             }             catch (Exception exception)             {                 if (!(exception is FormatException) && (exception.InnerException != null))                 {                     exception = ExceptionDispatchInfo.Capture(exception.InnerException).SourceException;                 }                 bindingContext.ModelState.TryAddModelError(bindingContext.ModelName, exception, bindingContext.ModelMetadata);                 return Task.CompletedTask;             }         }     }

 

最后将JObjectModelBinderProvider添加到Startup
            services.AddMvc(options =>
               {
                   options.ModelBinderProviders.Insert(0, new JObjectModelBinderProvider());//加入JobjectModelBinderProvider绑定
               });


使用
        [HttpPost]
        public IActionResult ComWizard(JObject data)
        {
            return new JsonResult(data);
        }
web端

 $.post("/Home/ComWizard", { UserName: "Jerry", Password: "123" }, function (data) {
                 alert(data.userName + "--" + data.password);//这是以Form键值对方式提交的，非Json，但在控制器会认为是JObject
             });