how to identify the file type and size of a file

use the HttpPostedFile and following properties :
ContentLength: size of uploaded file in bytes
ContentType: type of uploaded file, i.e. "image/gif"
FileName: full path to uploaded file on client's system,

or get everything at :File Upload with ASP.NET[^]

use

FileInfo fi = new FileInfo(filepath);
            fi.Extension;

and U can find many more it will solve ur requirement

see this link:

http://msdn.microsoft.com/en-us/library/aa479405.aspx[^]

hi,

use this below code to upload file in folder

public bool fnFileUpload(string FilePath, FileUpload FileUpload)
{ 
BinaryReader br = new BinaryReader(FileUpload.PostedFile.InputStream);
FileStream fstm = new FileStream(FilePath, FileMode.Create, FileAccess.ReadWrite);
BinaryWriter bw = new BinaryWriter(fstm);
byte[] buffer = br.ReadBytes(FileUpload.PostedFile.ContentLength);
br.Close();
bw.Write(buffer);
bw.Flush();
bw.Close();
return true;         
}

In the above code filepath is nothing but filename with the directory location ex:c:\temp\Myfile.txt

the code will save the file in file system only.

Send the FilePath value to the database and retrieve this info when read is required

I hope this will help