datagrid判斷數據是否可以合併併合並單元格

不多說，貼代碼：

function _setDefaultMearge() {
    var rows = $("#tt").datagrid('getRows');
    var len = rows.length;
    var preIndex = 0;
    for (var i = preIndex; i< len; i++) {
        var cityCode = rows[i].CITY_CODE;
        var cityCodeNum = 1;
        for (var j = i+1; j< len; j++) {
            if (cityCode == rows[j].CITY_CODE) {
                cityCodeNum++;
            } else {
                break;
            }
        }
        $('#tt').datagrid('mergeCells', {
            index: i,
            field: "CITY_NAME",
            rowspan: cityCodeNum
        });
        preIndex = cityCodeNum+i;

    }
}