继承 JsonResult 方式
使用Json.Net代替最简单的方法就是使用下面的JsonNetResult
来作为 ActionResult
返回。
1) Install-Package newtonsoft.json
2) 创建一个JsonNetResult继承自JsonResult(相当于自定义ActionResult)
public class JsonNetResult : JsonResult
{
public JsonNetResult()
{
Settings = new JsonSerializerSettings
{
ReferenceLoopHandling = ReferenceLoopHandling.Ignore,//忽略循环引用,如果设置为Error,则遇到循环引用的时候报错(建议设置为Error,这样更规范)
DateFormatString = "yyyy-MM-dd HH:mm:ss",//日期格式化,默认的格式也不好看
ContractResolver = new Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver()//json中属性开头字母小写的驼峰命名
};
}
public JsonSerializerSettings Settings { get; private set; }
public override void ExecuteResult(ControllerContext context)
{
if (context == null)
throw new ArgumentNullException("context");
if (this.JsonRequestBehavior == JsonRequestBehavior.DenyGet && string.Equals(context.HttpContext.Request.HttpMethod, "GET", StringComparison.OrdinalIgnoreCase))
throw new InvalidOperationException("JSON GET is not allowed");
HttpResponseBase response = context.HttpContext.Response;
response.ContentType = string.IsNullOrEmpty(this.ContentType) ? "application/json" : this.ContentType;
if (this.ContentEncoding != null)
response.ContentEncoding = this.ContentEncoding;
if (this.Data == null)
return;
var scriptSerializer = JsonSerializer.Create(this.Settings);
scriptSerializer.Serialize(response.Output, this.Data);
}
}
AOP 方式
下面使用最没有“侵入性”的方法(什么是“侵入性”?引入这个技术对系统的改动量)。
下面这种做法是体现了“一夫当关万夫莫开”的AOP的思想。
3) 新建一个类JsonNetActionFilter
public class JsonNetActionFilter : IActionFilter
{
public void OnActionExecuted(ActionExecutedContext filterContext)
{
//把 filterContext.Result从JsonResult换成JsonNetResult
//filterContext.Result值得就是Action执行返回的ActionResult对象
if (filterContext.Result is JsonResult
&&!(filterContext.Result is JsonNetResult))
{
JsonResult jsonResult = (JsonResult)filterContext.Result;
JsonNetResult jsonNetResult = new JsonNetResult();
jsonNetResult.ContentEncoding = jsonResult.ContentEncoding;
jsonNetResult.ContentType = jsonResult.ContentType;
jsonNetResult.Data = jsonResult.Data;
jsonNetResult.JsonRequestBehavior = jsonResult.JsonRequestBehavior;
jsonNetResult.MaxJsonLength = jsonResult.MaxJsonLength;
jsonNetResult.RecursionLimit = jsonResult.RecursionLimit;
filterContext.Result = jsonNetResult;
}
}
public void OnActionExecuting(ActionExecutingContext filterContext)
{
}
}
4) Global中加一句:GlobalFilters.Filters.Add(new JsonNetActionFilter ());