extjs获得store数据

                var json = new Array();

                for (var i = 0; i < storeEditFee.getCount(); i++) {

                    json.push(storeEditFee.getAt(i).data);

                }

                json = Ext.util.JSON.encode(json);

                $.ajax({

                    type: "post",

                    async: false,

                    cache: false,

                    data: { "ChkExpense": json },

                    url: "/Manager/_Business/CheckExpense",

                    success: function (data, s) {



                    },

                    error: function (XMLHttpRequest, textStatus, errorThrown) {

                        errStr = "What‘s  wrong？";

                    }

                });