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);
*/
}