数据的动态合并和导出至EXCEL

最近一段时间都在处理数据的动态合并和导出EXCEL的问题，写个demo记录下，希望和我碰到同样问题的博友可以顺利解决；后面会提供demo下载链接。

（VS2012，ASP.NET）

一、主要解决以下问题：

1、根据业务逻辑动态合并table单元格
2、动态合并后序号重写
3、datatable导出excel
4、datatable导出excel特殊字符处理
5、在实际问题中可能还有少许BUG，自行调试

二、重要代码摘录：

1、前台获取table HTML代码：

 <input type="hidden" runat="server" id="lblTableHtml" />

 function getDataHtml() {
             var table = document.getElementById("gridTable");
             if (table != null) {
                 var html = table.innerHTML;
                 document.getElementById("lblTableHtml").value = html;
             }
         }

2、自定义合并单元格：

 // 1、通过关联字段分组
                 for (int i = gridTable.Rows.Count - ; i > ; i--)
                 {
                     HtmlTableCell oCell_previous = gridTable.Rows[i - ].Cells[];
                     HtmlTableCell oCell = gridTable.Rows[i].Cells[];
                     if (oCell_previous != null && oCell != null)
                     {
                         if (oCell.InnerText == oCell_previous.InnerText)
                         {
                             for (int j = ; j <= ; j++)
                             {
                                 HtmlTableCell oCell_previousI = gridTable.Rows[i - ].Cells[j];
                                 HtmlTableCell oCellI = gridTable.Rows[i].Cells[j];
                                 if (oCell_previousI != null && oCellI != null)
                                 {
                                     oCell_previousI.RowSpan = (oCell_previousI.RowSpan == -) ?  : oCell_previousI.RowSpan;
                                     oCellI.RowSpan = (oCellI.RowSpan == -) ?  : oCellI.RowSpan;
                                 }

                                 oCellI.Visible = false;
                                 oCell_previousI.RowSpan += oCellI.RowSpan;
                             }
                         }
                     }
                 }

3、导出EXCEL逻辑：

 Response.Clear();
             Response.ContentType = "application/vnd.ms-excel";
             string excelname = sFileName + DateTime.Now.ToString("yyyyMMddHHmmss");
             Response.AddHeader("content-disposition", "attachment; filename=" + System.Web.HttpUtility.UrlEncode(excelname, System.Text.Encoding.UTF8) + ".xls");
             this.EnableViewState = false;
             System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
             System.Web.UI.HtmlTextWriter writer = new System.Web.UI.HtmlTextWriter(oStringWriter);
             System.Text.StringBuilder builder = new System.Text.StringBuilder();
             builder.Append("<table border='1'>");
             // 取出已经排好版的table
             string sHtml = lblTableHtml.Value;
             builder.Append(sHtml);
             builder.Append("</table>");
             writer.Write(builder.ToString());
             writer.Close();
             Response.Write(oStringWriter.ToString());
             Response.End();

三、Demo下载链接：

http://files.cnblogs.com/files/zhaosx/ExcelExportDemo.zip