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File Download ends incomplete..500 points..

I have a ASP .NET web page which downloads files..It is working perfectly for small & average sized files..But when I download a large file (17MB file for instance) it starts the download well, but after 2 minutes or so (after downloading about 6MB) it just finishes. The downloaded file is incomplete. Why is this happening and how can I troubleshoot this?

My download code is given below.
FileInfo file = null;
string filename = null;

// get the fully qualified name of the selected file
filename = utils.Utils.GetDownloadsArea() + m_filename;

// get the file data since the length is required for the download
file = new FileInfo(filename);

// write it to the browser
Response.Clear();
Response.AddHeader("Content-Disposition",
"attachment; filename=" + file.Name);
Response.AddHeader("Content-Length",
file.Length.ToString());
Response.ContentType = "application/octet-stream";
Response.WriteFile(filename);
Response.End();

Anything wrong or suspicious about this code snippet? What other reasons could cause a file download problem?

Thanks..

Göran Andersson

That code is not downloading anything. It's sending a file as response, it's the browser that's doing the downloading.

It's probably the request time-out that stops the code. Try to increase the time-out value:

Server.ScriptTimeout = 600; // ten minutes

LubomirMasar

ASKER

GreenGhost,

That is unlikely..I have set the ASPScriptTimeout of the site at a high value (like 54000 seconds) from the IIS admin tool. Is the Server.ScriptTimeout a different property than that? The website ConnectionTimeout is also high at 1800 secs.

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Göran Andersson

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LubomirMasar

ASKER

In any case, I put the Server.ScriptTimeout = 54000 in code prior to download..Made no difference whatsoever..The download is ending exactly after 90 secs. I dont know why it is so.

Göran Andersson

90 seconds is the default value for the timeout, which suggests that your attemt to change it failed.

Instead of a timeout of 15 hours, try a more reasonable value, like 15 minutes.

Check if there is a setting for executionTimeout attribute in the httpRuntime element in web.config.