动态类型dynamic(ExpandoObject)

ExpandoObject作为ViewModel给view传值

Action

public ActionResult Index(string id)

        {

            dynamic d = new ExpandoObject();

            d.id = id;

            d.name = "张三";

            return View(d);

        }

View

@model dynamic<div>

id=@Model.id

name=@Model.name</div>

ExpandoObject转换为json

1、直接转换json,格式不是我们想要的

public ActionResult Test(string id)

        {

            dynamic d = new ExpandoObject();

            d.id = id;

            d.name = "张三";

            return Json(d, JsonRequestBehavior.AllowGet);//结果:[{"Key":"id","Value":"123"},{"Key":"name","Value":"张三"}]

        }

2、转换成IDictionary<string, object>,然后再转换为json就好了

public ActionResult Test(string id)

        {

            dynamic d = new ExpandoObject();

            d.id = id;

            d.name = "张三";

            var di = d as IDictionary<string, object>;

            di = di.ToDictionary(x => x.Key, x => x.Value);

            return Json(di, JsonRequestBehavior.AllowGet);

        }
//结果{"id":"123","name":"张三"}

3、另一种方法JSON.NET

public ActionResult Test(string id)

        {

            dynamic d = new ExpandoObject();

            d.id = id;

            d.name = "张三";

            var json = JsonConvert.SerializeObject(d);

            return Content(json, "application/json");//结果正常:{"id":"123","name":"张三"}

 }

扩展方法

/// <summary>

        /// 对象转成可以扩充的匿名对象

        /// </summary>

        /// <param name="obj"></param>

        /// <returns></returns>

        public static dynamic ConvertToDynamic(object obj)

        {

            //知识点:ExpandoObject继承了IDictionary<String, Object>的接口

            IDictionary<string, object> result = new ExpandoObject();

            foreach (PropertyDescriptor pro in TypeDescriptor.GetProperties(obj.GetType()))

            {

                result.Add(pro.Name, pro.GetValue(obj));

            }

            return result as ExpandoObject;

            /*

            //=============1、新增属性

            //Product为一个class,默认只有一个属性Name

            Product p1 = new Product();

            p1.Name = "商品名称";

            dynamic result = ConvertToDynamic(p1);

            exProd.name1 = "我是新属性1";

            exProd.name2 = "我是新属性2";

            Response.Write(result.Name + "," + result.name1 + "," + result.name2);

            //=============2、删除属性

            ((IDictionary<string, object>)result).Remove("Name2");

            //=============3、枚举出已经存在的成员

            foreach (var pro in (IDictionary<string, Object>)result)

            {

                Console.WriteLine(pro.Key+" "+pro.Value);

            }

            //============4、转换json

            var di = d as IDictionary<string, object>;

            di = di.ToDictionary(x => x.Key, x => x.Value);

            return Json(di, JsonRequestBehavior.AllowGet);

             */

        }

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