Error on download file path in mvc controller

Question

This is my actionlink on the index view.

@Html.ActionLink("Download File", "Download", new { fileName = Model.OriginalRecordRelativeFilePath })


public FileResult Download(string fileName)
{
     try
     {
          var fs = System.IO.File.OpenRead(Server.MapPath(ConfigurationHelper.IntegrationInterfaceFolderPath + fileName));
     // ConfigurationHelper.IntegrationFolderPath is a path for C:\Data\IntergrationInterface\

     return File(fs, "application/octet-stream", fileName);
 }
 catch
 {
      throw new HttpException(404, "Couldn't find " + fileName);
 }

}

I try to download the file from C:\Data\IntergrationInterface\fileName. But it cannot find the path of C:\Data\IntergrationInterface\fileName and throw exception (Couldnt find fileName). May i know is there any ways to download the file from local c while running localhost web service on the same computer? Thank you.

The exception doesn't lie. Does the file exist? Verify the path, preferably by storing it in a separate variable. Does the user this site runs as have permissions to read the file? — CodeCaster
– CodeCaster, Commented Oct 31, 2014 at 8:49
Yes. The file existed. I created a dummy file named path in C:\Data\IntergrationInterface\path. the user this site is coded as system admin. So it has permission to read the file. — AhYap
– AhYap, Commented Oct 31, 2014 at 8:57
Change the code to string path = ConfigurationHelper.IntegrationInterfaceFolderPath + fileName; path = Server.MapPath(path); var fs = System.IO.File.OpenRead(path);. Inspect the variables on each step. — CodeCaster
– CodeCaster, Commented Oct 31, 2014 at 8:58

Binod Mahto · Accepted Answer · 2014-10-31 09:14:09Z

2

Do not use Server.MapPath here instead use your file path directly. For example @"C:\Data\IntergrationInterface\".

Currently you are trying to do Server.MapPath(@"C:\Data\IntergrationInterface\file.txt"), it means you are giving a physical path where as MapPath method expects a virtual path. Instead of this if you would give Server.MapPath("\ABC") then it will return the server path as "C:\inetpub\wwwroot\ABC", which will be basically your local server path.

answered Oct 31, 2014 at 9:14

Binod Mahto

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