带复杂表头合并单元格的HtmlTable转换成DataTable并导出Excel(转)

<!--导出Excel-->
<script type="text/javascript">
    //导出Excel
    function exportExcel() {
        var data = "";
        $("#divRptTable").find("table").find("tr").each(function () {
            var tr = $(this);
            tr.find("td").each(function () {
                var td = $(this);
                var rowspan = td.attr("rowspan") ? td.attr("rowspan") : 1;
                var colspan = td.attr("colspan") ? td.attr("colspan") : 1;
                data = data + td.text() + "#{valueSeparater}" + rowspan + "#{valueSeparater}" + colspan + "#{columnSeparater}";
            });
            data = data + "#{rowSeparater}";
        });
        $("#hidTableData").val(data);
        var year = $("select[name=‘year‘]").find("option[value=‘" + $("select[name=‘year‘]").val() + "‘]").text();
        var sem = $("select[name=‘sem‘]").find("option[value=‘" + $("select[name=‘sem‘]").val() + "‘]").text();
        var scl = $("select[name=‘school‘]").find("option[value=‘" + $("select[name=‘school‘]").val() + "‘]").text();
        var grade = $("select[name=‘grade‘]").find("option[value=‘" + $("select[name=‘grade‘]").val() + "‘]").text();
        var exam = $("select[name=‘exam‘]").find("option[value=‘" + $("select[name=‘exam‘]").val() + "‘]").text();
        $("#hidTitle").val(scl + " " + grade + " " + year + " " + sem + " " + exam);
        $("#frm").submit();
    }
</script>

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Web.UI.HtmlControls;
// 2014年4月2日
namespace QuaEdu.Controller.Core.Utils
{
    /// <summary>
    /// HtmlTable工具类
    /// 提供字符串转换成HtmlTable，HtmlTable转换成DataTable
    /// </summary>
    public class HtmlTableUtil
    {
        #region 变量
        /// <summary>
        /// 行分隔
        /// </summary>
        public static readonly string rowSeparater = "|||||";
        /// <summary>
        /// 列分隔
        /// </summary>
        public static readonly string columnSeparater = "@@@@@";
        /// <summary>
        /// 值分隔
        /// </summary>
        public static readonly string valueSeparater = "$$$$$";
        /// <summary>
        /// 空值标识
        /// </summary>
        public static readonly string nullFlag = "HtmlTableUtil_NULL_FLAG";
        #endregion
        #region 字符串转换成HtmlTable
        /// <summary>
        /// 字符串转换成HtmlTable
        /// </summary>
        public static HtmlTable String2HtmlTable(string data)
        {
            HtmlTable htmlTable = new HtmlTable();
            string[] rowArray = data.Split(new string[] { rowSeparater }， StringSplitOptions.RemoveEmptyEntries);
            foreach (string row in rowArray)//遍历行
            {
                HtmlTableRow htmlTableRow = new HtmlTableRow();
                string[] colArray = row.Split(new string[] { columnSeparater }， StringSplitOptions.RemoveEmptyEntries);

                foreach (string col in colArray)//遍历列
                {
                    HtmlTableCell htmlTableCell = new HtmlTableCell();
                    string[] valArr = col.Split(new string[] { valueSeparater }， StringSplitOptions.None);
                    string val = valArr[0];
                    int rowspan = int.Parse(valArr[1]);
                    int colspan = int.Parse(valArr[2]);
                    htmlTableCell.InnerText = val;
                    htmlTableCell.RowSpan = rowspan;
                    htmlTableCell.ColSpan = colspan;
                    htmlTableRow.Cells.Add(htmlTableCell);
                }
                htmlTable.Rows.Add(htmlTableRow);
            }
            return htmlTable;
        }
        #endregion
        #region HtmlTable转换成DataTable
        /// <summary>
        /// HtmlTable转换成DataTable
        /// </summary>
        public static DataTable HtmlTable2DataTable(HtmlTable htmlTable)
        {
            DataTable dataTable = new DataTable();
            #region DataTable列数
            int colCount = 0;
            if (htmlTable.Rows.Count > 0)
            {
                foreach (HtmlTableCell htmlTableCell in htmlTable.Rows[0].Cells)
                {
                    colCount += htmlTableCell.ColSpan;
                }
            }
            #endregion
            #region DataTable行数
            int rowCount = htmlTable.Rows.Count;
            #endregion
            #region 给DataTable添加列
            for (int i = 0; i < colCount; i++)
            {
                dataTable.Columns.Add();
            }
            #endregion
            #region 给DataTable添加行
            for (int i = 0; i < rowCount; i++)//遍历行
            {
                DataRow dataRow = dataTable.NewRow();
                for (int j = 0; j < colCount; j++)//遍历列
                {
                    dataRow[j] = null;
                }
                dataTable.Rows.Add(dataRow);
            }
            #endregion
            #region 转换
            for (int i = 0; i < htmlTable.Rows.Count; i++)//遍历HtmlTable行
            {
                HtmlTableRow htmlTableRow = htmlTable.Rows[i];
                int delta = 0;//列增量
                for (int j = 0; j < htmlTableRow.Cells.Count; j++)//遍历HtmlTable列
                {
                    HtmlTableCell htmlTableCell = htmlTableRow.Cells[j];
                    #region 计算delta
                    for (int k = j + delta; k < colCount; k++)
                    {
                        string cellValue = dataTable.Rows[i][k].ToString();
                        if (cellValue != null)
                        {
                            if (cellValue.IndexOf(nullFlag) == 0)
                            {
                                delta++;
                                continue;
                            }
                        }
                        break;
                    }
                    #endregion
                    #region 填充DataTable
                    dataTable.Rows[i][j + delta] = htmlTableCell.InnerText + valueSeparater + htmlTableCell.RowSpan + valueSeparater + htmlTableCell.ColSpan;
                    if (htmlTableCell.RowSpan > 1 || htmlTableCell.ColSpan > 1)
                    {
                        for (int m = 0; m < htmlTableCell.RowSpan; m++)
                        {
                            for (int n = 0; n < htmlTableCell.ColSpan; n++)
                            {
                                if (!(m == 0 && n == 0))
                                {
                                    int ii = i + m;
                                    int jj = j + delta + n;
                                    dataTable.Rows[ii][jj] = nullFlag + valueSeparater + "1" + valueSeparater + "1";
                                }
                            }
                        }
                    }
                    #endregion
                }
            }
            #endregion
            return dataTable;
        }
        #endregion
    }
}