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Join Date: Jul 2008

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Reputation: Mythili.D is an unknown quantity at this point

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Mythili.D

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Images Downloading from asp.net website

Jul 16th, 2008

Hello,
I have a website which allows the user to download the images from it. I used the following code. It download for most of the images but for some it tries to download as a file without extension. So can you please suggest what might be causing this.
thanks
Mythili

 Help with Code Tags 
 ASP.NET Syntax (Toggle Plain Text) 
 // Output standard image
 
                    DataRow romImage = DAImage.GetImageByID(imageID);
                    System.Drawing.Image image = GetImage(WebConfigurationManager.AppSettings["ImageLibraryPath"] + romImage["RelPath"]);
 
                    Response.Clear();
                    string extension = romImage["RelPath"].ToString().Substring(romImage["RelPath"].ToString().LastIndexOf(".") + 1);
 
 
                    Response.AddHeader("Content-Disposition", "attachment; filename=\"" + romImage["Description"].ToString() + "." + extension + "\"");
                    Response.ContentType = "image/" + extension;
 
                    System.Drawing.Imaging.ImageFormat imgFormat = System.Drawing.Imaging.ImageFormat.Jpeg  ;
 
                    image.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
 // Output standard image
                   
                    DataRow romImage = DAImage.GetImageByID(imageID);
                    System.Drawing.Image image = GetImage(WebConfigurationManager.AppSettings["ImageLibraryPath"] + romImage["RelPath"]);

                    Response.Clear();
                    string extension = romImage["RelPath"].ToString().Substring(romImage["RelPath"].ToString().LastIndexOf(".") + 1);
                    

                    Response.AddHeader("Content-Disposition", "attachment; filename=\"" + romImage["Description"].ToString() + "." + extension + "\"");
                    Response.ContentType = "image/" + extension;
                   
                    System.Drawing.Imaging.ImageFormat imgFormat = System.Drawing.Imaging.ImageFormat.Jpeg  ;

                    image.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);

Last edited by Tekmaven; Jul 16th, 2008 at 3:11 pm. Reason: Code tags

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Join Date: Apr 2007

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greeny_1984 greeny_1984 is offline

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Re: Images Downloading from asp.net website

Jul 17th, 2008

hi,
y dont u use System.IO.Path.GetExtension
there u can get the extension.

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Join Date: Jul 2008

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Reputation: Mythili.D is an unknown quantity at this point

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Mythili.D

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Re: Images Downloading from asp.net website

Jul 17th, 2008

Thanks for your response. I was looking for this over a day now. The good news is I found the solution. There was no problem in the code. It is problem with how the file is uploaded. It is the description or the filename by which this file is downloaded. If the file name has / because it is a escape sequence it is not downloaded properly. Hence it appeared as if it forgot the extension suddenly in the middle of downloading the file itself.
thanks
Mythili