easyui合并行（同列内容合并）

理论支撑N列合并，前提是数据已经按照第一列分类排序。

//datagrid的id
var tableID = 'XXXX';
//要合并的列
var colList = ['列名1','列名2','列名3'];

//每次合并列的标记
var resultInbdex = null;
//合并列
for(var i=0;i<cols.length;i++)
    resultInbdex = mergeCellsByField("dg", cols[i], resultInbdex);

function mergeCellsByField(tableID,colList,lastResultIndex) {

            var resultIndex = new Array();//当前合并行数标记
            var ColArray = colList.split(",");//指定合并列
            var tTable = $("#" + tableID);//表格
            var rowdata = tTable.datagrid("getRows");//行数据
            var TableRowCnts = rowdata.length;//总行数
            var tmpA;//累加行数
            var PerTxt = "";//上一行
            var CurTxt = "";//当前行

            for (j = ColArray.length - 1; j >= 0; j--) {//列
                PerTxt = "";
                tmpA = 1;
                for (i = 0; i <= TableRowCnts; i++) {//行

                    if (i == TableRowCnts) {
                        CurTxt = "";
                    }else {
                        CurTxt = rowdata[i][ColArray[j]];
                    }

                    if(lastResultIndex!=null){  

                        var parentInext = lastResultIndex[0];

                        if(i>=parentInext){//不超父列
                            var currIndex = i - tmpA;
                            resultIndex.push(i);

                            if(tmpA > 1 ){
                                tTable.datagrid("mergeCells", {
                                    index: currIndex,
                                    field: ColArray[j],//合并字段
                                    rowspan: tmpA,
                                    colspan: null
                                });
                            }
                            tmpA = 1;
                            lastResultIndex.shift();

                        }else{
                            if(i==0){//第一行不需合并记录行号
                                PerTxt = CurTxt;
                                continue;
                            }else if (PerTxt == CurTxt) {//内容相等
                                tmpA += 1;
                            }else { 
                                var currIndex = i - tmpA;
                                resultIndex.push(i);

                                if(tmpA > 1 ){
                                    tTable.datagrid("mergeCells", {
                                        index: currIndex,
                                        field: ColArray[j],//合并字段
                                        rowspan: tmpA,
                                        colspan: null
                                    });
                                }

                                tmpA = 1;



                            }
                        }

                    }else{

                        if(i==0){//第一行不需合并记录行号
                            PerTxt = CurTxt;
                            continue;
                        }else if (PerTxt == CurTxt) {//内容相等
                            tmpA += 1;
                        }else { 

                            var currIndex = i - tmpA;
                            resultIndex.push(i);

                            if(tmpA > 1 ){
                                tTable.datagrid("mergeCells", {
                                    index: currIndex,
                                    field: ColArray[j],//合并字段
                                    rowspan: tmpA,
                                    colspan: null
                                });
                            }

                            tmpA = 1;



                        }

                    }



                    PerTxt = CurTxt;
                }

            }
            return resultIndex;
        }