easyui datagrid 合并相同行

$.extend($.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：

$('#grid).datagrid("autoMergeCells", ['field1', 'field2','field3',……]);