C＃从网络驱动器下载文件

Question

I have a file that is located at a network drive. The user access is already created to have full access to the path. But it seems that when I ran the following code to get the file, the browser just does not respond.

FileInfo file = new FileInfo(GetDocumentUploadFolder(ID) + fileName);

// Checking if file exists
if (file.Exists)
{
    // Clear the content of the response
    this.Page.Response.ClearContent();

    // Clear the header of the response
    this.Page.Response.ClearHeaders();

    // Set the ContentType
    this.Page.Response.ContentType = "application/pdf";

    // Write the file into the response (TransmitFile is for ASP.NET 2.0. In ASP.NET 1.1 you have to use WriteFile instead)
    this.Page.Response.WriteFile(file.FullName);

    // End the response
    this.Page.Response.End();
}

I tried using this.Page.Response.TransmitFile(file.FullName); and it also does not work. The page seems to stop functioning after this.Page.Response.End();

Any ideas?

Answer 1

No matter where file a stored. Your action must return a file as the result:

public FileResult GetBytes()
{
   string path = Server.MapPath("~/Files/PDFIcon.pdf");
   byte[] mas = System.IO.File.ReadAllBytes(path);
   string file_type = "application/pdf";
   string file_name = "PDFIcon.pdf";
   return File(mas, file_type, file_name);
}

Server.MapPath(filePath string) - must have access to the file.

Answer 2

I am able to do a workaround by copying the files first from the network drive to local path and then do a TransmitFile from there:

FileInfo file = new FileInfo(GetDocumentUploadFolder(ID) + fileName);
string strFolder = Server.MapPath(LocalLocation);
string strDestination = Server.MapPath(LocalLocation + "\\" + fileName);

// Checking if file exists
if (file.Exists)
{
    if (!Directory.Exists(strFolder))
        Directory.CreateDirectory(strFolder);
    // Delete contents in this folder
    Common.DeleteFiles(strFolder, "*.*");
    file.CopyTo(strDestination, true);

    // Clear the content of the response
    this.Page.Response.ClearContent();

    // Clear the header of the response
    this.Page.Response.ClearHeaders();

    // Set the ContentType
    this.Page.Response.ContentType = "application/pdf";

    // Write the file into the response (TransmitFile is for ASP.NET 2.0. In ASP.NET 1.1 you have to use WriteFile instead)
    this.Page.Response.TransmitFile(strDestination);

    // End the response
    this.Page.Response.End();
}