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);
             */
        }