I am going to write about ASP.NET by using the following simple code snippet page you can download any type of file in ASP.NET 4.5.2 Cloud Hosting using C#.NET. Please observe the steps in the following code to know how the 'file downloading process' is happening.
FileManagement.aspx
<%@ Page Language="C#" %>
<!DOCTYPE html>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
var fullFilePath = @"D:\Krish\gallery (1).jpg";
DownloadFile(fullFilePath, System.IO.Path.GetFileName(fullFilePath));
}
private void DownloadFile(string fullFilePhysicalPath, string downloadbleFileName)
{
// Create New instance of FileInfo
System.IO.FileInfo file = new System.IO.FileInfo(fullFilePhysicalPath);
// Checking if file exists
if (file.Exists)
{
// Clear the content of the response
Response.ClearContent();
// Add the file name and attachment
Response.AddHeader("Content-Disposition", "attachment; filename=" + downloadbleFileName);
// Add the file size into the response header
Response.AddHeader("Content-Length", file.Length.ToString());
// Set the ContentType
Response.ContentType = GetFileExtension(file.Extension.ToLower());
// Write the file into the response
// ASP.NET 2.0 – TransmitFile
// ASP.NET 1.1 – WriteFile
Response.TransmitFile(file.FullName);
// End the response
Response.End();
}
}
private string GetFileExtension(string fileExtension)
{
switch (fileExtension)
{
case ".htm":
case ".html":
case ".log":
return "text/HTML";
case ".txt":
return "text/plain";
case ".doc":
return "application/ms-word";
case ".tiff":
case ".tif":
return "image/tiff";
case ".asf":
return "video/x-ms-asf";
case ".avi":
return "video/avi";
case ".zip":
return "application/zip";
case ".xls":
case ".csv":
return "application/vnd.ms-excel";
case ".gif":
return "image/gif";
case ".jpg":
case "jpeg":
return "image/jpeg";
case ".bmp":
return "image/bmp";
case ".wav":
return "audio/wav";
case ".mp3":
return "audio/mpeg3";
case ".mpg":
case "mpeg":
return "video/mpeg";
case ".rtf":
return "application/rtf";
case ".asp":
return "text/asp";
case ".pdf":
return "application/pdf";
case ".fdf":
return "application/vnd.fdf";
case ".ppt":
return "application/mspowerpoint";
case ".dwg":
return "image/vnd.dwg";
case ".msg":
return "application/msoutlook";
case ".xml":
case ".sdxl":
return "application/xml";
case ".xdp":
return "application/vnd.adobe.xdp+xml";
default:
return "application/octet-stream";
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
</form>
</body>
</html>