ASP. net file download file name garbled processing ~ ~

Using System; Using System.Collections.Generic; Using System.Linq; Using System.Web; Using System.IO;

Using ELEMENTLIBRARY.BLL; Using Elementlibrary.model; Using System.Text; /*  * liuh  * Descr: Download processing downloadfile.ashx  * addtime:2014/8/26  * lastmodifytime:2014/8/27  */ namespace ElementLibrary.Web.Action {   //<summary>    ///downloadfile Summary Description & nbsp;  //</summary>     public class Downloadfile:ihttphandler     {& nbsp;       ELEMENTDETAILBLL ELEMENTDETAILBLL = new ELEMENTDETAILBLL ();         public void ProcessRequest (HttpContext context)          {            String Strfunid = context. request.querystring["id"]. ToString ();//Gets the method ID (component ID)             MODEL. Elementdetailinfo elementdetailinfo = elementdetailbll.getallcontent (Strfunid);//client-saved file name &NBSP;&NBSP;&NBSP;&Nbsp;        string fileName = Elementdetailinfo.filename;             string strFilePath = Elementdetailinfo.filepath ;             string FilePath = context. Server.MapPath (strFilePath);//Path             FileInfo FileInfo = new FileInfo (FilePath);             context. Response.Clear ();             context. Response.clearcontent ();             context. Response.ClearHeaders ();           //fix file name garbled (Liuh addtime:2014/8/28)              if (context. Request.UserAgent.Contains ("MSIE") | | Context. Request.UserAgent.Contains ("MSIE"))             {                //If clients use Microsoft Internet Explorer, they need to encode                   filename = tohexstring (filename);            }              context. Response.AddHeader ("Content-disposition", "attachment;filename=" + filename);             context. Response.AddHeader ("Content-length", fileInfo.Length.ToString ());             context. Response.AddHeader ("content-transfer-encoding", "binary");             context. Response.ContentType = "Application/octet-stream";             context. response.contentencoding = System.Text.Encoding.GetEncoding ("Utf-8");             context. Response.WriteFile (Fileinfo.fullname);             context. Response.Flush ();            //fileinfo.delete ();             context. Response.End ();        }

       //<summary>        // Encode non-English characters in a string        ///</summary>         //<param name= "s" ></param>        //<returns></ returns>         public static string tohexstring (string s)    & nbsp;    {            char[] chars = S. ToCharArray ();             StringBuilder builder = new StringBuilder ();             for (int index = 0; index < chars. Length; index++)             {                 bool Needtoencode = needtoEncode (Chars[index]);                 if (needtoencode)                 {                     string encodedstring = tohexstring (Chars[index]);                      Builder. Append (encodedstring);                }                  Else                  {                     Builder. Append (Chars[index]);                }             }

Return builder.         ToString (); }

<summary>///Specify whether a character should be encoded///</summary>//<param name= "CHR" ></param&         Gt <returns></returns> private static bool Needtoencode (char chr) {string Reserv Edchars = "$-_.+!* ' (),@=&";

if (Chr > 127) return true; if (char. Isletterordigit (CHR) | | Reservedchars.indexof (CHR) >= 0) return false;

return true; }

       //<summary>        // For non-English string encoding        ///</summary>         //<param name= "CHR" ></param>        //<returns>< /returns>         private static string tohexstring (char chr)          {            utf8encoding UTF8 = new UTF8Encoding ();             byte[] encodedbytes = UTF8. GetBytes (Chr. ToString ());             StringBuilder builder = new StringBuilder ();             for (int index = 0; index < encodedbytes.length; index++)             {                Builder. AppendFormat ("%{0}", Convert.ToString (Encodedbytes[index], 16));            }              return builder. ToString ();        }

public bool IsReusable {get {return false; }         }     } }

ASP. net file download file name garbled processing ~ ~