FTP handler page, call string from aspx help with method to initialize handler page

Hey guys, tryed to clean up my last post so here it goes.

I have a handler page in my asp.net project that is “trying” to handle a ftp download request.

GetImage.ashx.cs

public class GetImage : IHttpHandler
{

    public void ProcessRequest(HttpContext context)
    {
        {

            // method for calling PhotoPath from Database.aspx.cs
            FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create(new Uri());
            // (new Uri) I would like to just store "photopath" in here as it has the ftp plus the filename in it
            request.Method = WebRequestMethods.Ftp.DownloadFile;

            request.Credentials = new NetworkCredential("username", "password");

            try
            {
                FtpWebResponse response = (FtpWebResponse)request.GetResponse();

                Stream stream = response.GetResponseStream();
                byte[] bytes = new byte[2048];

                int i = 0;
                MemoryStream mStream = new MemoryStream();

                do
                {

                    i = stream.Read(bytes, 0, bytes.Length);

                    mStream.Write(bytes, 0, i);
                } while (i != 0);

                context.Response.ClearHeaders();
                context.Response.ClearContent();
                context.Response.ContentType = "image/jpeg";
// Response.Headers.Add("Content-Type", "image/jpeg"); this is from the database.aspx page not sure if its correct 
                    context.Response.BinaryWrite(mStream.GetBuffer());
                }
                catch (WebException wex)
                {

            }
            catch (Exception ex)
            {
                throw new Exception("An error occurred: " + ex);

            }

        }
    }

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

}

On my page that holds my gridview I have a method to extract data from one of my cells, this cell contains the ftp path and filename of the image im trying to show in my image control:

Database.aspx.cs

protected void Page_Load(object sender, EventArgs e){

        Response.Headers.Add("Content-Type", "image/jpeg");

    }

    protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
    {
        string PhotoPath = "";
        // Get the currently selected row. Because the SelectedIndexChanging event
        // occurs before the select operation in the GridView control, the
        // SelectedRow property cannot be used. Instead, use the Rows collection
        // and the NewSelectedIndex property of the e argument passed to this 
        // event handler.
        GridViewRow row = GridView1.Rows[GridView1.SelectedIndex];

        PhotoPath = row.Cells[5].Text;
        // how do I send photopath to my handler page?
        //TextBox1.Text = PhotoPath;
    }
}

}

In my handler page I want to call the string “PhotoPath” and place it in my ftwwebrequest in my handler page:

FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create(new Uri(PhotoPath));

Ive set my image control ImageUrl to ~/GetImage.ashx and will need some help with code to call the handler from my database page?

Can any one help because ive been stuck on this for ages?

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

• You need to pass PhotoPath to the ASHX handler using the querystring. You should then read the parameter from the querystring and pass it to WebRequest.Create
• You should not swallow exceptions
• You don’t need to clear the response
• You should copy the FtpWebResponse directly to the HttpResponse; you don’t need an intermediate MemoryStream
• The ContentType property tells the browser what kind of file you’re sending. See http://en.wikipedia.org/wiki/MIME_type

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