ExtJS Ext.Ajax.request最好设为同步

function GetPatientOrder() {
    Ext.Ajax.request({
        url: ‘/CommonAshx/Order.ashx‘,
        method: ‘get‘,
        async: false,
        params: {
            gurd: "GetOrder",
            patientCardNo: Ext.getCmp("CardNo").value
        },
        success: function (response, options) {
            var responseJson = Ext.decode(response.responseText);
            docAdGrid.store.loadData(responseJson.rows);
        },
        failure: function () {
            Ext.Msg.alert("错误", "与后台联系的时候出了问题。");
        }
    });
}