ASP.NET MVC 使用NPOI导出Excel 无法访问已关闭的流(转)

第一步重写MemoryStream , 让它不能自动关闭.

 1 //新建类 重写Npoi流方法
 2 public class NpoiMemoryStream : MemoryStream
 3     {
 4         public NpoiMemoryStream()
 5         {
 6             AllowClose = true;
 7         }
 8 
 9         public bool AllowClose { get; set; }
10 
11         public override void Close()
12         {
13             if (AllowClose)
14                 base.Close();
15         }
16 }

第二部控制一下.

//导出Excel文件的方法
var ms = new NpoiMemoryStream();
ms.AllowClose = false;
workbook.Write(ms);
ms.Flush();
ms.Seek(0, SeekOrigin.Begin);
ms.AllowClose = true;

return File(ms, "application/vnd.ms-excel","某某.xlsx");

转载: http://www.cnblogs.com/codedreams/p/5662740.html