c# - ASHX image handler works with chrome, not IE8 -

i've created code retrieve image file system using ashx handler. code displays image correctly in chrome, broken image in ie:

public class imagehandler : ihttphandler {      private int? qs_imageid     {                 {             int? temp = null;              if (httpcontext.current.request.querystring["imageid"] != null)                 temp = ha.utility.datahelper.parsedbint(httpcontext.current.request.querystring["imageid"]);              return temp;         }      }      private bool qs_thumbnail     {                 {             bool thumbnail = false;             if (httpcontext.current.request.querystring["thumbnail"] != null)             {                 if (httpcontext.current.request.querystring["thumbnail"].equals("1"))                     thumbnail = true;             }              return thumbnail;         }      }      public void processrequest(httpcontext context)     {         if (qs_imageid.hasvalue)         {             int uploadid = qs_imageid.value;             context.response.clearheaders();             context.response.clearcontent();             context.response.cache.setnostore();               context.response.contenttype = uploaddal.getmetadata(uploadid).uploadcontenttype;             context.response.addheader("content-disposition", "inline;");              if (qs_thumbnail)             {                  byte[] myimage = uploaddal.getfilethumbnail(uploadid);                 context.response.addheader("content-length", myimage.getlength(0).tostring());                 context.response.binarywrite(myimage);                 context.response.end();             }             else             {                 byte[] myimage = uploaddal.getfile(uploadid);                 context.response.addheader("content-length", myimage.getlength(0).tostring());                 context.response.binarywrite(myimage);                 context.response.end();             }         }     }      public bool isreusable     {                 {             return false;         }     }  } 

the problem didn't specify mime type file. here common image mime types, function meant return corresponding mime type of file:

 string getcontenttype(string path) {     switch (path.getextension(path))     {         case ".bmp": return "image/bmp";         case ".gif": return "image/gif";         case ".jpg": return "image/jpeg";         case ".png": return "image/png";         default : break;     }     return ""; } 

if image physically stored on hard drive, can use piece of code is, if not @ least can give idea how determine mime type. in processrequest method, use

 context.response.contenttype = getcontenttype(imagefilename); 

of course said before, if don't have physical path file (for example if it's stored in database) should still know image type.

hope helps,
andrei