C#

Check if File Exists

See more SFTP Examples

Demonstrates how to check to see if a file exists. C#

bool success = false;

//  This example assumes the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

Chilkat.SFtp sftp = new Chilkat.SFtp();

//  Connect to the SSH server.  
string hostname = "sftp.example.com";
int port = 22;
success = sftp.Connect(hostname,port);
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

//  Authenticate with the SSH server.  Chilkat SFTP supports
//  both password-based authenication as well as public-key
//  authentication.  This example uses password authenication.
success = sftp.AuthenticatePw("myLogin","myPassword");
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

//  After authenticating, the SFTP subsystem must be initialized:
success = sftp.InitializeSftp();
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

//  Check to see if a file exists

//  The return value is one of the following values:
//  -1: Unable to check. Examine the LastErrorText to determine the reason for failure.
//  0: File does not exist.
//  1: The regular file exists.
//  2: It exists, but it is a directory.
//  3: It exists, but it is a symlink (only possible if followLinks is false)
//  4: It exists, but it is a special filesystem entry type.
//  5: It exists, but it is an unkown filesystem entry type.
//  6: It exists, but it is an socket filesystem entry type.
//  7: It exists, but it is an char device entry type.
//  8: It exists, but it is an block device entry type.
//  9: It exists, but it is an FIFO entry type.

bool followLinks = true;
int status = sftp.FileExists("someDir/someFile.txt",followLinks);
if (status < 0) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

Debug.WriteLine("status = " + Convert.ToString(status));

Debug.WriteLine("Success");