hello all i m ashutosh rath from mumbai working as a junior programmer in c#

[ashutosh rath]

i want to upload only zip files by c#, the format of file should be "ab_data.zi p" format (start from 2 char thn one underscore thn after 4 chars)

my code is.......

string fileNameText = null;
string fileextension;
filename = Fileuploading.V alue.ToString() .Trim();

if (Fileuploading. PostedFile!=nul l)
{
if(Fileuploadin g.PostedFile.In putStream.Lengt h > 0)
{
fileextension = Path.GetExtensi on(filename.ToS tring().ToLower ()); if(fileextensio n != ".zip")
{
//error message;

}
else
{
fileNameText=fi lename.Substrin g(filename.Last IndexOf(directo ryseperater)+1, filename.Length-(filename.LastI ndexOf(director yseperater)+ 1));
Fileuploading.P ostedFile.SaveA s(Request.MapPa th("/AspNetLearn/Upload")+ "//"+ fileNameText);
filepath = ("/AspNetLearn/Upload") + "/" + fileNameText ;
//message success;
}
}
}



plzzzz anyone help me...