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POHowto: download a file keeping the original name in C#?
 

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  1. POHowto: download a file keeping the original name in C#?
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    <p>I have files on a server that can be accessed from a URL formatted like this: http:// address/Attachments.aspx?id=GUID</p> <p>I have access to the GUID and need to be able to download multiple files to the same folder.</p> <p>if you take that URL and throw it in a browser, you will download the file and it will have the original file name.</p> <p>I want to replicate that behavior in C#. I have tried using the WebClient class's DownloadFile method, but with that you have to specify a new file name. And even worse, DownloadFile will overwrite an existing file. I know I could generate a unique name for every file, but i'd really like the original.</p> <p>Is it possible to download a file preserving the original file name?</p> <p><strong>Update:</strong></p> <p>Using the fantastic answer below to use the WebReqest class I came up with the following which works perfectly:</p> <pre><code> public override void OnAttachmentSaved(string filePath) { var webClient = new WebClient(); //get file name var request = WebRequest.Create(filePath); var response = request.GetResponse(); var contentDisposition = response.Headers["Content-Disposition"]; const string contentFileNamePortion = "filename="; var fileNameStartIndex = contentDisposition.IndexOf(contentFileNamePortion, StringComparison.InvariantCulture) + contentFileNamePortion.Length; var originalFileNameLength = contentDisposition.Length - fileNameStartIndex; var originalFileName = contentDisposition.Substring(fileNameStartIndex, originalFileNameLength); //download file webClient.UseDefaultCredentials = true; webClient.DownloadFile(filePath, String.Format(@"C:\inetpub\Attachments Test\{0}", originalFileName)); } </code></pre> <p>Just had to do a little string manipulation to get the actual filename. I'm so excited. Thanks everyone!</p>
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    1. USnitewulf50
    1. USnitewulf50
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    1. COIf you want original file names then you need a different kind of server, an FTP server.
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      1. POHowto: download a file keeping the original name in C#?
      1. USHans Passant
    2. CO@HansPassant: No; he just needs to parse `Content-Disposition`.
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      1. POHowto: download a file keeping the original name in C#?
      1. USSLaks
    3. COYou don't have to manually parse the Content-Disposition header, .NET has a class to do this (`System.Net.Mime.ContentDisposition`)
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      1. POHowto: download a file keeping the original name in C#?
      1. USDaniel Lo Nigro
 

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