I have a file being retrieved from an FTP server (that part works) that needs to be encrypted. The below is the code I have which doesn't seem to be working. "FileEncrypter" is a command line executable that takes "File1.dd", encrypts it, and names the encrypted file "File1.edd". The only problem is, it doesn't seem to encrypt when this code is executed, but it does when I type it into a command prompt.

private void Encrypt()
{
    string path = System.Web.HttpContext.Current.Server.MapPath("/wsCN/data");
        string command = @"cd " + path + " & FileEncrypter -iFile1.dd -oFile1.edd";
    System.Diagnostics.Process.Start("cmd", command);
}

My first guess is that the web application lacks the correct permissions to write files. When you run it manually, you are doing so under your user account that has far more rights on your system.

Search for procedures for setting write permissions for ASP.NET web apps and see if that fixes the problem.

-Peter

Permissions don't appear to be the issue here. Since I posted the original message, I noticed something quite important to the potential solution. When that method is executed by itself, the encryption process works as designed. When the previous method is executed, that's when the encryption does not happen. This method works because the datestamp on the file changes when it's called.

private void DownloadFile()
{
    string sSaveAddress = System.Web.HttpContext.Current.Server.MapPath("/wsCN") + "/data/File1.ee";
    System.Net.WebClient client = new System.Net.WebClient();
    client.Credentials = new System.Net.NetworkCredential(sUserId, sPwd);
    System.IO.Stream MyStream = client.OpenRead(sFolder);
    System.IO.BinaryReader MyStreamReader = new System.IO.BinaryReader(MyStream);
    System.Net.WebClient ftpClient = new System.Net.WebClient();
    System.IO.Stream MyWriteStream = ftpClient.OpenWrite(sSaveAddress, "PUT");
    System.IO.BinaryWriter MyStreamWriter = new System.IO.BinaryWriter(MyWriteStream);
    int rd = 0;
    long total = 0;
    int bufSize = 1024;
    byte[] buf = new byte[bufSize];
    while ((rd = MyStreamReader.Read(buf, 0, bufSize)) != 0)
    {
        total += rd;
        MyStreamWriter.Write(buf, 0, rd);
    }
    MyStream.Close();
    Encrypt();
}