1. 转换成CSV文件：

http://www.dotnetgallery.com/lab/resource93-Export-to-CSV-file-from-Data-Table-in-Aspnet.aspx

2. 读取CSV文件：
http://www.dotnetfox.com/articles/parse-or-read-csv-file-using-textfieldparser-in-Asp-Net-1112.aspx

3. 将数据库中的文件 转换成word Excel CSV Text 等文件

http://www.aspsnippets.com/Articles/Export-DataSet-or-DataTable-to-Word-Excel-PDF-and-CSV-Formats.aspx

http://www.c-sharpcorner.com/Blogs/12486/export-gridview-data-to-excel-word-pdf-text-and-csv-forma.aspx

4. 转换成PDF文件  并带有格式

http://www.aspdotnet-suresh.com/2013/05/aspnet-export-webpage-with-images-to.html