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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：
1 <input type="hidden" runat="server" id="lblTableHtml" />
1 function getDataHtml() { 2 var table = document.getElementById("gridTable"); 3 if (table != null) { 4 var html = table.innerHTML; 5 document.getElementById("lblTableHtml").value = html; 6 } 7 }
2、自定义合并单元格：
1 // 1、通过关联字段分组 2 for (int i = gridTable.Rows.Count - 1; i > 0; i--) 3 { 4 HtmlTableCell oCell_previous = gridTable.Rows[i - 1].Cells[4]; 5 HtmlTableCell oCell = gridTable.Rows[i].Cells[4]; 6 if (oCell_previous != null && oCell != null) 7 { 8 if (oCell.InnerText == oCell_previous.InnerText) 9 { 10 for (int j = 4; j <= 7; j++) 11 { 12 HtmlTableCell oCell_previousI = gridTable.Rows[i - 1].Cells[j]; 13 HtmlTableCell oCellI = gridTable.Rows[i].Cells[j]; 14 if (oCell_previousI != null && oCellI != null) 15 { 16 oCell_previousI.RowSpan = (oCell_previousI.RowSpan == -1) ? 1 : oCell_previousI.RowSpan; 17 oCellI.RowSpan = (oCellI.RowSpan == -1) ? 1 : oCellI.RowSpan; 18 } 19 20 oCellI.Visible = false; 21 oCell_previousI.RowSpan += oCellI.RowSpan; 22 } 23 } 24 } 25 }
3、导出EXCEL逻辑：
1 Response.Clear(); 2 Response.ContentType = "application/vnd.ms-excel"; 3 string excelname = sFileName + DateTime.Now.ToString("yyyyMMddHHmmss"); 4 Response.AddHeader("content-disposition", "attachment; filename=" + System.Web.HttpUtility.UrlEncode(excelname, System.Text.Encoding.UTF8) + ".xls"); 5 this.EnableViewState = false; 6 System.IO.StringWriter oStringWriter = new System.IO.StringWriter(); 7 System.Web.UI.HtmlTextWriter writer = new System.Web.UI.HtmlTextWriter(oStringWriter); 8 System.Text.StringBuilder builder = new System.Text.StringBuilder(); 9 builder.Append("<table border=‘1‘>"); 10 // 取出已经排好版的table 11 string sHtml = lblTableHtml.Value; 12 builder.Append(sHtml); 13 builder.Append("</table>"); 14 writer.Write(builder.ToString()); 15 writer.Close(); 16 Response.Write(oStringWriter.ToString()); 17 Response.End();
三、Demo下载链接：
http://files.cnblogs.com/files/zhaosx/ExcelExportDemo.zip
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原文地址：http://www.cnblogs.com/zhaosx/p/5020003.html
