扩展LigerUI的Grid中的相同列合并行功能，代码如下：
$.extend($.ligerui.controls.Grid.prototype, {
_getHtmlFromData:function(data, frozen) {
if (!data) return "";
var g = this, p = this.options;
var gridhtmlarr = [];
var rowSpanData = {};
var islast = false;
for (var i = 0, l = data.length; i < l; i++)
{
islast = (i==data.length-1);
var item = data[i];
var rowid = item['__id'];
if (!item) continue;
gridhtmlarr.push('<tr');
gridhtmlarr.push(' id="' + g._getRowDomId(item, frozen) + '"');
gridhtmlarr.push(' class="l-grid-row'); //class start
if (!frozen && g.enabledCheckbox() && p.isChecked && p.isChecked(item))
{
g.select(item);
gridhtmlarr.push(' l-selected');
}
else if (g.isSelected(item))
{
gridhtmlarr.push(' l-selected');
}
else if (p.isSelected && p.isSelected(item))
{
g.select(item);
gridhtmlarr.push(' l-selected');
}
if (item['__index'] % 2 == 1 && p.alternatingRow)
gridhtmlarr.push(' l-grid-row-alt');
//自定义css class
if (p.rowClsRender)
{
var rowcls = p.rowClsRender(item, rowid);
rowcls && gridhtmlarr.push(' ' + rowcls);
}
gridhtmlarr.push('" '); //class end
if (p.rowAttrRender) gridhtmlarr.push(p.rowAttrRender(item, rowid));
if (p.tree && g.collapsedRows && g.collapsedRows.length)
{
var isHide = function ()
{
var pitem = g.getParent(item);
while (pitem)
{
if ($.inArray(pitem, g.collapsedRows) != -1) return true;
pitem = g.getParent(pitem);
}
return false;
};
if (isHide()) gridhtmlarr.push(' style="display:none;" ');
}
else if (p.tree && p.tree.isExtend)
{
var isHide = function ()
{
var pitem = g.getParent(item);
while (pitem)
{
if (p.tree.isExtend(pitem) == false) return true;
pitem = g.getParent(pitem);
}
return false;
};
if (isHide()) gridhtmlarr.push(' style="display:none;" ');
}
gridhtmlarr.push('>');
$(g.columns).each(function (columnindex, column)
{
if (frozen != column.frozen) return;
if(column.rowSpan){
var key = column.name;
var data = rowSpanData[key];
var value = g._getCellContent(item, column);
if(data){
if(data.value==value){
data.count = data.count+1;
rowSpanData[key] = data;
if(!islast){
return true;
}
}else{
if((data.domId&&data.count>1)){
var rowSpanTd = 'id="'+data.domId+'"';
$.each(gridhtmlarr,function(index,str){
if(rowSpanTd==$.trim(str)){
str = str+" rowspan="+data.count;
gridhtmlarr[index] = str;
}
});
}
data = {value:value,count:1,domId:g._getCellDomId(item, this)};
rowSpanData[key] = data;
}
if(islast){
if((data.domId&&data.count>1)){
var rowSpanTd = 'id="'+data.domId+'"';
$.each(gridhtmlarr,function(index,str){
if(rowSpanTd==$.trim(str)){
str = str+" rowspan="+data.count;
gridhtmlarr[index] = str;
}
});
return true;
}
}
}else{
data = {value:value,count:1,domId:g._getCellDomId(item, this)};
rowSpanData[key] = data;
}
}
gridhtmlarr.push('<td');
gridhtmlarr.push(' id="' + g._getCellDomId(item, this) + '"');
//如果是行序号(系统列)
if (this.isrownumber)
{
gridhtmlarr.push(' class="l-grid-row-cell l-grid-row-cell-rownumbers" style="' + this.width + 'px"><div class="l-grid-row-cell-inner"');
if (p.fixedCellHeight)
gridhtmlarr.push(' style = "height:' + p.rowHeight + 'px;" ');
else
gridhtmlarr.push(' style = "min-height:' + p.rowHeight + 'px;" ');
gridhtmlarr.push('>' + (parseInt(item['__index']) + 1) + '</div></td>');
return;
}
//如果是复选框(系统列)
if (this.ischeckbox)
{
gridhtmlarr.push(' class="l-grid-row-cell l-grid-row-cell-checkbox" style="' + this.width + 'px"><div class="l-grid-row-cell-inner"');
if (p.fixedCellHeight)
gridhtmlarr.push(' style = "height:' + p.rowHeight + 'px;" ');
else
gridhtmlarr.push(' style = "min-height:' + p.rowHeight + 'px;" ');
gridhtmlarr.push('>');
gridhtmlarr.push('<span class="l-grid-row-cell-btn-checkbox"></span>');
gridhtmlarr.push('</div></td>');
return;
}
//如果是明细列(系统列)
else if (this.isdetail)
{
gridhtmlarr.push(' class="l-grid-row-cell l-grid-row-cell-detail" style="' + this.width + 'px"><div class="l-grid-row-cell-inner"');
if (p.fixedCellHeight)
gridhtmlarr.push(' style = "height:' + p.rowHeight + 'px;" ');
else
gridhtmlarr.push(' style = "min-height:' + p.rowHeight + 'px;" ');
gridhtmlarr.push('>');
if (!p.isShowDetailToggle || p.isShowDetailToggle(item))
{
gridhtmlarr.push('<span class="l-grid-row-cell-detailbtn"></span>');
}
gridhtmlarr.push('</div></td>');
return;
}
var colwidth = this._width;
gridhtmlarr.push(' class="l-grid-row-cell ');
if (g.changedCells[rowid + "_" + this['__id']]) gridhtmlarr.push("l-grid-row-cell-edited ");
if (this.islast)
gridhtmlarr.push('l-grid-row-cell-last ');
gridhtmlarr.push('"');
//if (this.columnname) gridhtmlarr.push('columnname="' + this.columnname + '"');
gridhtmlarr.push(' style = "');
gridhtmlarr.push('' + colwidth + 'px; ');
if (column._hide)
{
gridhtmlarr.push('display:none;');
}
gridhtmlarr.push(' ">');
gridhtmlarr.push(g._getCellHtml(item, column));
gridhtmlarr.push('</td>');
});
gridhtmlarr.push('</tr>');
}
return gridhtmlarr.join('');
}
});
但我们往往在合并行时，是需要根据行的其他值来判断，譬如订单号不同，那其后面的行就不能合并成一行，因为如果合并成一行，反而不清晰，最佳的办法是如果前面的列不同，后面的列合并时，不能跨行合并
以上代码稍作调整：
if (column.rowSpan) {//如果列定义了合并行 update zjy
var key = column.name;
var data = rowSpanData[key]; //获取合并行的合集
var value = g._getCellContent(item, column);//这个行对应列的值
if (data) {//存在, 在循环第二行或者多行的情况下，判断是否和上一行有相同的值，如果有相同，表示合并1行+1，
if (data.value == value) {
data.count = data.count + 1;//合并的行数
rowSpanData[key] = data;//重新赋值到集合
if (!islast) {
return true;
}
} else {
//如果相同的列名，但和上一行不一致，那就重新赋值，重新赋值之前，将之前的rowspan赋值。
if ((data.domId && data.count > 1)) {
var rowSpanTd = 'id="' + data.domId + '"';
$.each(gridhtmlarr, function (index, str) {
if (rowSpanTd == $.trim(str)) {
str = str + " rowspan=" + data.count;
gridhtmlarr[index] = str;
}
});
$(g.columns).each(function (x, m) {
if (m.rowSpan) {
if (data.orderseq < x) {
var _find = rowSpanData[m.name]; //获取合并行的合集
if (_find) {
if ((_find.domId && _find.count > 1)) {
var _findRowSpanTd = 'id="' + _find.domId + '"';
$.each(gridhtmlarr, function (_index, _str) {
if (_findRowSpanTd == $.trim(_str)) {
_str = _str + " rowspan=" + _find.count;
gridhtmlarr[_index] = _str;
}
});
}
//data = { value: g._getCellContent(item, m), count: 1, domId: g._getCellDomId(item, this), orderseq: x };
rowSpanData[m.name] = null; //置空
}
}
}
});
}
else if (data.domId && data.count == 1) {
$(g.columns).each(function (x, m) {
if (m.rowSpan) {
if (data.orderseq < x) {
var _find = rowSpanData[m.name]; //获取合并行的合集
if (_find) {
if ((_find.domId && _find.count > 1)) {
var _findRowSpanTd = 'id="' + _find.domId + '"';
$.each(gridhtmlarr, function (_index, _str) {
if (_findRowSpanTd == $.trim(_str)) {
_str = _str + " rowspan=" + _find.count;
gridhtmlarr[_index] = _str;
}
});
}
rowSpanData[m.name] = null; //置空
}
}
}
});
}
//重新将这个列名赋值到集合列
data = { value: value, count: 1, domId: g._getCellDomId(item, this), orderseq: columnindex };
rowSpanData[key] = data;
//rowSpanData[key] = null;
}
if (islast) {
//最后一个直接赋值rowSpan
if ((data.domId && data.count > 1)) {
var rowSpanTd = 'id="' + data.domId + '"';
$.each(gridhtmlarr, function (index, str) {
if (rowSpanTd == $.trim(str)) {
str = str + " rowspan=" + data.count;
gridhtmlarr[index] = str;
}
});
return true;
}
}
} else {
//没有在合并行中出现，就是第一个，将这个值保存在临时合并行集合中
data = { value: value, count: 1, domId: g._getCellDomId(item, this), orderseq: columnindex };
rowSpanData[key] = data;
}
}
columns: [ { rowSpan: true }]