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             });