Ajax请求数据响应格式，一个醒目组必须是同意的，前端才知道怎么应付，还有很多其他情况，比如异常了，有ExceptionFilter，按照固定格式返回，比如没有权限，Authorization，按照固定格式返回。
Http请求的本质：
请求--应答式，响应可以那么丰富？不同的类型其实方式一样的，只不过有个ContenetType的差别，html--text/html、json--application/json、xml/application/xml、js--application/JavaScript、ico--image/x-icon、image/gif、image/jepg、image/png.....
这个等于是Http协议约定，Web框架和浏览器共同支持的。其实就是服务器告诉浏览器如何处理这个数据，从页面下载pdf或者页面展示pdf靠的就是ContentType，application/pdf、application/octet-stream。
MVC各种Result的事，JsonResult实际上就是JsonResult，继承ActionResult，然后重写ExecuteResult方法，指定ContentType为application/json，然后将Data序列化成字符串写入stream，我们可以随意扩展，只需要把数据放到response，指定好ContentType
ContentType对照表：http://tool.oschina.net/commons
/// <summary>
/// 返回ActionResult--MVC框架会执行其ExecuteResult方法---
/// </summary>
/// <returns></returns>
public JsonResult JsonResultIn()
{
return Json(new AjaxResult()
{
Result = DoResult.Success,
DebugMessage = "这里是JsonResult"
}, JsonRequestBehavior.AllowGet);
}
比如我们现在来扩展个NewtonJsonResult
public class NewtonJsonResult : ActionResult
{
private object Data = null;
public NewtonJsonResult(object data)
{
this.Data = data;
}
public override void ExecuteResult(ControllerContext context)
{
HttpResponseBase response = context.HttpContext.Response;
response.ContentType = "application/json";
response.Write(Newtonsoft.Json.JsonConvert.SerializeObject(this.Data));
}
}
调用的时候：
/// <summary>
/// 返回ActionResult--MVC框架会执行其ExecuteResult方法---
/// </summary>
/// <returns></returns>
public NewtonJsonResult JsonResultNewton()
{
return new NewtonJsonResult(new AjaxResult()
{
Result = DoResult.Success,
DebugMessage = "这里是JsonResult"
});
}
AjaxResult：
public class AjaxResult
{
public AjaxResult()
{ }
public string DebugMessage { get; set; }
public string PromptMsg { get; set; }
public DoResult Result { get; set; }
public object RetValue { get; set; }
public object Tag { get; set; }
}
public enum DoResult
{
Failed = ,
Success = ,
OverTime = ,
NoAuthorization = ,
Other =
}
自定义扩展XMLResult
/// <summary>
/// 自定义扩展XML格式result
/// </summary>
public class XmlResult : ActionResult
{
private object _data; public XmlResult(object data)
{
_data = data;
} public override void ExecuteResult(ControllerContext context)
{
var serializer = new XmlSerializer(_data.GetType());
var response = context.HttpContext.Response;
response.ContentType = "text/xml";
serializer.Serialize(response.Output, _data);
}
}
public XmlResult XmlResult()
{
return new XmlResult(new AjaxResult()
{
Result = DoResult.Success,
DebugMessage = "这里是JsonResult"
});
}
现在，我们不写返回值，直接写入stream
/// </summary>
public void JsonResultVoid()
{
HttpResponseBase response = base.HttpContext.Response;
response.ContentType = "application/json";
response.Write(
Newtonsoft.Json.JsonConvert.SerializeObject(new AjaxResult()
{
Result = DoResult.Success,
DebugMessage = "这里是JsonResult"
}));
}