.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:

 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

 

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
             });


posted @ 2017-01-09 13:27  Showmu  阅读(4458)  评论(0编辑  收藏  举报