foreach on Request.Files

Question

I'm attempting upload multiple files in ASP.NET MVC and I have this simple foreach loop in my controller

foreach (HttpPostedFileBase f in Request.Files)
{
    if (f.ContentLength > 0)
        FileUpload(f);
}

The previous code generates this error:

Unable to cast object of type 'System.String' to type 'System.Web.HttpPostedFile'.

What I don't understand is why Request.Files[1] returns an HttpPostedFileBase but when it's iterated over, it returns strings (presumably the file names).

Note: I know this can be solved with a for loop. Also, I tried using HttpPostedFile, with the same error.

user_1659605 · Answer

You can get the HttpPostedFile out of the HttpFileCollection using foreach like this:

foreach (var obj in fileCollection)
{
    HttpPostedFile file = fileCollection.Get(obj.ToString());
}

foreach on Request.Files

7 Answers