asp.net/HTML file upload control not uploading mutiple files as expected - html

Question

I am using asp.net file control. I am uploading multiple files. The problem is when I select two or multiple files, it's only upload one file multiple times. I mean if I select two different images, It will upload the first image two times. And if I select three images, then it will upload first image three times.
My file upload control is following,
<asp:FileUpload runat="server" ID="file" multiple />
And I server side code is following
protected void click(object sender, EventArgs e) {
foreach (string s in Request.Files)
{
HttpPostedFile file = Request.Files[s];
int fileSizeInBytes = file.ContentLength;
string fileName = Request.Headers["X-File-Name"];
string fileExtension = "";
if (!string.IsNullOrEmpty(fileName))
fileExtension = Path.GetExtension(fileName);
// IMPORTANT! Make sure to validate uploaded file contents, size, etc. to prevent scripts being uploaded into your web app directory
string savedFileName = Path.Combine(#"D:\Temp\", Guid.NewGuid().ToString() + ".jpg");
file.SaveAs(savedFileName);
}
}
I have no idea why this is behaving this way. When I debug the server side code, it's giving me different names of files from "Request.Headers["X-File-Name"]" but somehow it's uploading same content (the first image from the multiple images that I try to upload)

Answer 1

You can get posted files from file upload control if you are using ASP.NET > 4.0 like this
foreach (HttpPostedFile f in file.PostedFiles)
{
//HttpPostedFile file = Request.Files[s];
int fileSizeInBytes = f.ContentLength;
string fileName = f.FileName;
string fileExtension = "";
if (!string.IsNullOrEmpty(fileName))
fileExtension = Path.GetExtension(fileName);
// IMPORTANT! Make sure to validate uploaded file contents, size, etc. to prevent scripts being uploaded into your web app directory
string savedFileName = Path.Combine(#"D:\Temp\", Guid.NewGuid().ToString() + ".jpg");
f.SaveAs(savedFileName);
}
With ASP.NET 4.0 or less aslo available in 4.0 and above
HttpFileCollection fc = Request.Files;
for (int i = 0; i < fc.Count; i++)
{
HttpPostedFile f = fc[i];
int fileSizeInBytes = f.ContentLength;
string fileName = f.FileName;
string fileExtension = "";
if (!string.IsNullOrEmpty(fileName))
fileExtension = Path.GetExtension(fileName);
// IMPORTANT! Make sure to validate uploaded file contents, size, etc. to prevent scripts being uploaded into your web app directory
string savedFileName = Path.Combine(#"D:\Temp\", Guid.NewGuid().ToString() + ".jpg");
f.SaveAs(savedFileName);
}