IE6下载excel文件名截断问题

代码

 1   System.Text.Encoding code  =  System.Text.Encoding.GetEncoding( " UTF-8 " );
 2                  HttpContext.Current.Response.ContentEncoding  =  code;
 3                  HttpContext.Current.Response.HeaderEncoding  =  System.Text.Encoding.Default;
 4 
 5                   if  (fileName.Contains( " .xls " )  ||  fileName.Contains( " .xlsx " ))
 6                  {
 7                      HttpContext.Current.Response.ContentType  =   " application/vnd.ms-excel;chartset=utf-8 " ;
 8 
 9                  }
10 
11                   else
12                  {
13                      HttpContext.Current.Response.ContentType  =   " application/x-msdownload " ;
14                  }
15                  HttpContext.Current.Response.AppendHeader( " Connection " ,  " keep-alive " );
16 
17                 
18 
19                  HttpContext.Current.Response.AppendHeader( " Content-Disposition " ,  " attachment;filename= "   +  fileName);
20 
21                  HttpContext.Current.Response.AddHeader( " Content-Length " , fileSize.ToString());
22 
23                   byte [] fileBuffer;
24                  
25                   if  (fileSize  >   0 )
26                  {
27                      fileBuffer  =   new   byte [fileSize];
28                      fileStream.Read(fileBuffer,  0 , ( int )fileSize);
29 
30                  }
31                   else
32                  {
33                       // 文件流长度为空时，构造一个不为0的字节数组
34                      fileBuffer  =   new   byte [ 1 ];
35                  }
36                  fileStream.Close();
37                  HttpContext.Current.Response.BinaryWrite(fileBuffer);
38                  
39                  HttpContext.Current.Response.Flush();
40                  HttpContext.Current.Response.End();