Question

I have some files in "~Content/Documents" folder which holds every uploaded file. In my case the user can only upload one file.

I have done the uploading part where the user can upload his file.

if (file.ContentLength > 0)
{
    var fileName = Path.GetFileName(file.FileName);
    var fullpath = System.Web.HttpContext.Current.Server.MapPath("~/Content/Documents");
    file.SaveAs(Path.Combine(fullpath,"document"+Path.GetExtension(fileName)));
}

My problem is:
User can upload either ".doc", ".docx", ".xls", ".xlsx", or ".pdf" format files.
Now when the user upload the file of ".doc" format it is uploaded to the folder. Later the same user can upload the file of ".pdf" format which is also uploaded to the folder. That means the user can upload two files.

Now what I want to do is:
When a specific user uploads his document:
->search whether the document uploaded by the user is in that folder or not. i.e. the specific filename with different extension exists or not.
->if the filename already exists with different extension then remove that file and upload the new file.

Answer 1

Try this, Just another way; If your filename is "document"

string[] files = System.IO.Directory.GetFiles(fullpath,"document.*");
foreach (string f in files)
{
   System.IO.File.Delete(f);
}

So your code would be;

if (file.ContentLength > 0)
{
    var fileName = Path.GetFileName(file.FileName);
    var fullpath = System.Web.HttpContext.Current.Server.MapPath("~/Content/Documents");

    //deleting code starts here
    string[] files = System.IO.Directory.GetFiles(fullpath,"document.*");
    foreach (string f in files)
    {
       System.IO.File.Delete(f);
    }
    //deleting code ends here
    file.SaveAs(Path.Combine(fullpath,"document"+Path.GetExtension(fileName)));
}