js webservice 跨域访问

摘自：http://www.jb51.net/article/83833.htm

前端代码：

$.ajax({

  type: "get" ,

  url: "http://localhost/Service1.asmx/getElevatorStatusJsonData?jsoncallback=?" ,

  dataType: "jsonp" ,

  jsonp: "json" ,

  data: "" ,

  success: function (result) {

  var data = eval(result);

  for ( var i = 0; i < data.length; i++) {

  alert(data[i].ID + "--" + data[i].Name);

  }

  },

  error: function (a, b, c) {

  alert(c);

  }

  }); 

服务端代码：

/// <summary>

/// 获取状态数据信息

/// </summary>

/// <returns></returns>

[WebMethod]

public void getElevatorStatusJsonData()

{

List<List<DeviceInfo>> elevatordatas = new List<List<DeviceInfo>>();

List<SendDicdate> searchList = XmlSerializeHelper.XmlDeserializeFromFile<List<SendDicdate>>(@ConfigUtil.servicePath + ConfigUtil.getConfigByKey( "xmlPath" ) + "查询指令信息.xml" , Encoding.UTF8);

foreach (SendDicdate item in searchList)

{

string key = item.portno + "-" + item.bordrate + "-" + item.sendtype;

List<DeviceInfo> deviceInfoList = (List<DeviceInfo>)Context.Cache.Get(key);

elevatordatas.Add(deviceInfoList);

}

 

String result = "" ;

DataContractJsonSerializer json = new DataContractJsonSerializer(elevatordatas.GetType());

using (MemoryStream stream = new MemoryStream())

{

json.WriteObject(stream, elevatordatas);

result = Encoding.UTF8.GetString(stream.ToArray());

}

String jsoncallback = HttpContext.Current.Request[ "jsoncallback" ];

result = jsoncallback + '(' + result + ')' ;

HttpContext.Current.Response.Write(result);

HttpContext.Current.Response.End();

 

}

方法二

<script src= "http://common.cnblogs.com/script/jquery.js" type= "text/javascript" ></script>

<script type= "text/javascript" >

//跨域（可跨所有域名）

$.getJSON( "http://e.hnce.com.cn/tools/ajax.aspx?jsoncallback=?" , { id: 0, action: 'jobcategoryjson' }, function (json) { alert(json[0].pid); alert(json[0].items[0]._name); });　

 </script>




转载于:https://blog.51cto.com/zhaoyingyatou/1845474