Extjs中向数据字典发送请求及解析json数据

if (e.field == 'realAmount') {   
            var wageNumber = 0;
                   Ext.Ajax.request({
                          url:'/dict/queryDictEntries',
                          method : 'POST',
                          params: { dictTypeCode: 'WMS.WAGE'},
                       success: function(resp,opts) {
                           var retObj = Ext.util.JSON.decode(resp.responseText);
                           var val = retObj[0].code;
                           wageNumber = parseInt(val);
                            
                              console.info(wageNumber+"****");
                           if ((e.value)<wageNumber){
                               Ext.Msg.alert("系统提示：", "实发工资不能低于"+wageNumber+"元，请重新输入！", function() {wageSheetEditWindow.wageSheetEditGrid.startEditing(e.row, e.column);});
                           }
                           
                       },
                       failure: function(form, action) {
                       }
                });

        }