var grid = new Ext.grid.GridPanel({        store: store,        trackMouseOver: false,        disableSelection: true,        autoHeight: true,        autoWidth: true,        autoScroll: true,        viewConfig: {            forceFit: true        },        loadMask: true,        sm: new Ext.grid.RowSelectionModel({ singleSelect: true }),        columns: [new Ext.grid.RowNumberer(), {            header: '录音文件名',            dataIndex: 'FileName',            sortable: true        }]    });    grid.addListener('rowdblclick', rowdblclickFn);    function rowdblclickFn(grid, rowindex, e) {        var select = grid.getSelectionModel();        var data = select.getSelected().data;        var filename = data.FileName;        alert(filename);    }