解决jQuery ajax跨域问题，Google、IE、Firefox亲测有效

直接上最后的结果吧

JS：

 1 $.ajax({

 2             type: "GET",

 3             async: false,

 4             crossDomain: true,

 5             url: "www.test.com/TestHandler.ashx",

 6             data: { Id: "1"},

 7             dataType: "jsonp",

 8             jsonp: "callback",

 9             jsonpCallback: "callbackHandler",

10             success: function (data) {

11                 //success

12             },

13             error: function (x, status, error) {

14                 //error

15             }

16         });

View Code

服务端（这里我用的是ashx一般处理程序）：

 1 public void ProcessRequest(HttpContext context)

 2         {

 3             JavaScriptSerializer jsonHelper = new JavaScriptSerializer();

 4 

 5             HttpContext.Current.Response.ContentType = "application/json";

 6             HttpContext.Current.Response.AddHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS");

 7             HttpContext.Current.Response.AddHeader("Access-Control-Allow-Headers", "Origin, Content-Type,Authorization, Accept, X-Requested-With");

 8             HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "*");

 9 

10             var list=数据;

11             

12             if (string.IsNullOrEmpty(context.Request["callback"]))

13             {

14                 context.Response.Write(jsonHelper.Serialize(list));

15             }

16             else

17             {

18                 context.Response.Write(string.Format("{0}({1})", context.Request["callback"], jsonHelper.Serialize(list)));

19             }

20         }

View Code