I created a controller which save files.
The below code is a part of that Controller:
if ( Request.Files.Count != 0 ) {
HttpFileCollectionBase files = Request.Files;
foreach ( HttpPostedFileBase file in files ) {
if ( file.ContentLength > 0 ) {
if ( !file.ContentType.Equals( "image/vnd.dwg" ) ) {
return RedirectToAction( "List" );
}
}
}
}
in ASPX page is simple:
<input type="file" name="file" />
<input type="file" name="file" />
...// many inputs type file
The problem is foreach because it returns an error like (I know because I run in Debug mode and placed breakpoint at foreach statement):
Unable to cast object of type 'System.String' to type 'System.Web.HttpPostedFileBase'.
What is my mistake ?
Try like this:
[HttpPost]
public ActionResult Upload(IEnumerable<HttpPostedFileBase> files)
{
if (files != null && files.Count() > 0)
{
foreach (var uploadedFile in files)
{
if (uploadedFile.ContentType != "image/vnd.dwg")
{
return RedirectToAction("List");
}
var appData = Server.MapPath("~/app_data");
var filename = Path.Combine(appData, Path.GetFileName(uploadedFile.FileName));
uploadedFile.SaveAs(filename);
}
}
return RedirectToAction("Success");
}
and modify the markup so that the file inputs are named files:
<input type="file" name="files" />
<input type="file" name="files" />
...// many inputs type file
for (int i = 0; i < Request.Files.Count; i++)
{
var file = Request.Files[i];
// this file's Type is HttpPostedFileBase which is in memory
}
HttpRequestBase.Files requires an index, so use for instead of foreach.
Have a look at this post by Phil Haack which demonstrates how to process multiple file uploads using MVC. The object you are trying to use is for ASP.NET Webforms.
