$.extend($.fn.datagrid.methods, {    autoMergeCells : function (jq, fields) {        return jq.each(function () {            var target = $(this);            if (!fields) {                fields = target.datagrid("getColumnFields");            }            var rows = target.datagrid("getRows");            var i = 0,                j = 0,                temp = {};            for (i; i < rows.length; i++) {                var row = rows[i];                j = 0;                for (j; j < fields.length; j++) {                    var field = fields[j];                    var tf = temp[field];                    if (!tf) {                        tf = temp[field] = {};                        tf[row[field]] = [i];                    } else {                        var tfv = tf[row[field]];                        if (tfv) {                            tfv.push(i);                        } else {                            tfv = tf[row[field]] = [i];                        }                    }                }            }            $.each(temp, function (field, colunm) {                $.each(colunm, function () {                    var group = this;                    if (group.length > 1) {                        var before,                            after,                            megerIndex = group[0];                        for (var i = 0; i < group.length; i++) {                            before = group[i];                            after = group[i + 1];                            if (after && (after - before) == 1) {                                continue;                            }                            var rowspan = before - megerIndex + 1;                            if (rowspan > 1) {                                target.datagrid('mergeCells', {                                    index : megerIndex,                                    field : field,                                    rowspan : rowspan                                });                            }                            if (after && (after - before) != 1) {                                megerIndex = after;                            }                        }                    }                });            });        });    }});

使用方法：

$(this).datagrid("autoMergeCells",合并字段数组);

$(this).datagrid("autoMergeCells",['areaname','businessnames']);