ASP.NET MVC 实现跨域请求的两种形式

$.ajax({
type: "GET",
url: "http://10.174.1.1/Home/Test?callback=?",
data: { id: "1" },
dataType: "jsonp",
jsonp: "callback",
success: function (data) {
alert(data);
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert(errorThrown);
}
});

//Jsonp跨域访问
[HttpGet]
public ActionResult Test()
{
string vid = Request.QueryString["id"];
string callback = Request["callback"];
return new JsonpResult<object>(Member.FirstOrDefault(u => u.id == id).Name, callback);
}

public class JsonpResult<T> : ActionResult
{
public T Obj { get; set; }
public string CallbackName { get; set; }

public JsonpResult(T obj, string callback)
{
this.Obj = obj;
this.CallbackName = callback;
}

public override void ExecuteResult(ControllerContext context)
{
var js = new System.Web.Script.Serialization.JavaScriptSerializer();
var jsonp = this.CallbackName + "(" + js.Serialize(this.Obj) + ")";

context.HttpContext.Response.ContentType = "application/json";
context.HttpContext.Response.Write(jsonp);
}
}

$.ajax({
type: "GET",
url: "http://10.174.1.1/Home/Test2",
data: { id: "1" },
dataType: "json",
success: function (data) {
alert(data);
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert(errorThrown);
}
});

//跨站资源共享实现跨站AJAX请求
public ActionResult Test2()
{
string vid = Request.QueryString["id"];
HttpContext.Response.AppendHeader("Access-Control-Allow-Origin", "*");
return Json(Member.FirstOrDefault(u => u.id == id).Name, JsonRequestBehavior.AllowGet);
}