Ajax的简单请求案例

 1         $.ajax({

 2                 url : rootPath +'/jasframework/choosepilecontrol/querySubsytem.do',

 3                 type : "POST",

 4                 dataType : "json",

 5                 success:function(data){

 6                     if(data.subsystem!=null){

 7                         var length = data.subsystem.length;

 8                         var option = new Option('-----请选择-----','');

 9                         subsystemSelectObj.add(option);

10                         if(length>0){

11                             for(var i=0;i<data.subsystem.length;i++){//循环数组,添加子节点

12                                 var eventid = data.subsystem[i].EVENTID;

13                                 var name = data.subsystem[i].SUBSYSTEMNAME;

14                                 var option = new Option(name,eventid);

15                                 subsystemSelectObj.add(option);

16                             }

17                             subsystemSelectObj.options[0].selected=true;

18                             if(callback){

19                                 callback();//调用页面传递进来的回调函数，主要用于修改页面设置分区值

20                             }

21                         }

22                     }

23                 }

24             });



3.在请求前进行操作

 1     $.ajax({

 2             type: "put",

 3             url: szURL,

 4             async: false,

 5             timeout: 15000,

 6             processData: false,

 7             data: xmlDoc,        

 8             beforeSend: function(xhr) {

 9                 xhr.setRequestHeader("If-Modified-Since", "0");

10                 xhr.setRequestHeader("Authorization", "Basic " + g_oCommon.m_szUserPwdValue);

11             },

12             error:function(xhr, textStatus, errorThrown) {

13                 that.setState(xhr);

14             }

15         });

 

 当含有请求失败时候的案例

 1         $("#btnendsave").click(function(){

 2             $.ajax({

 3                 url : rootPath +'/jasframework/choosepilecontrol/queryMarkerById.do?MarkerId='+$('#endMarkerId1').val(),

 4                 type : 'POST',

 5                 success : function(data) {

 6                     var objJson = JSON.parse(data);

 7                     if($('#endMarkerPostion1').val()!=''){

 8                         $('#'+endMarkerTextId).val(objJson[0].markername+"+"+$('#endMarkerPostion1').val()+"m");

 9                     }else{

10                         $('#'+endMarkerTextId).val(objJson[0].markername);

11                     }

12                     

13                 },

14                 error : function(data) {

15                     top.showAlert('错误', '查询出错', 'error');

16                 }

17             });