Keep Coding

I am working on an ASP .net webpage which receives a form which is posted to it. The posted form has three as well.
filename = uploadFile(HttpContext.Current.Request.Files["file1"], path);
This is the code through which i upload a file to my server. And this is the code of the function.
public string uploadFile(HttpPostedFile file, string dest)
{
string filename = file.FileName;
string path = Server.MapPath(dest);
String extension = Path.GetExtension(file.FileName);
filename = filename.Replace(extension, "");
filename = filename.Replace(".", "");
filename = System.DateTime.Now.ToString("ddMMyyyyhhmmss") + filename + extension;
string savepath = path + "/" + filename;
file.SaveAs(savepath);
return filename;
}
The problem is I am not able to check if file1 from the posted form actually has file. Is it possible?

Use the FileUpload control in conjunction with the HasFile property:
FileUpload.HasFile Property
If you have to do it that way, you can simply check if the ContentLength is greater than zero.