Checks if a file exsts on the server by taking a
file listing of the parent directory in the path
and comparing the results the path supplied.
Namespace: System.Net.FtpClient
Assembly: System.Net.FtpClient (in System.Net.FtpClient.dll) Version: 1.0.5064.17461
Syntax
| C# |
|---|
public IAsyncResult BeginFileExists(
string path,
FtpListOption options,
AsyncCallback callback,
Object state
) |
| Visual Basic |
|---|
Public Function BeginFileExists (
path As String,
options As FtpListOption,
callback As AsyncCallback,
state As Object
) As IAsyncResult |
| Visual C++ |
|---|
public:
virtual IAsyncResult^ BeginFileExists(
String^ path,
FtpListOption options,
AsyncCallback^ callback,
Object^ state
) sealed |
Return Value
Type:
IAsyncResultIAsyncResult
Implements
IFtpClient..::..BeginFileExists(String, FtpListOption, AsyncCallback, Object)
Examples
| C# |
 Copy
|
using System;
using System.Net;
using System.Net.FtpClient;
using System.Threading;
namespace Examples {
public static class BeginFileExistsExample {
static ManualResetEvent m_reset = new ManualResetEvent(false);
public static void BeginFileExists() {
using (FtpClient conn = new FtpClient()) {
m_reset.Reset();
conn.Host = "localhost";
conn.Credentials = new NetworkCredential("ftptest", "ftptest");
conn.Connect();
conn.BeginFileExists("foobar", new AsyncCallback(BeginFileExistsCallback), conn);
m_reset.WaitOne();
conn.Disconnect();
}
}
static void BeginFileExistsCallback(IAsyncResult ar) {
FtpClient conn = ar.AsyncState as FtpClient;
try {
if (conn == null)
throw new InvalidOperationException("The FtpControlConnection object is null!");
Console.WriteLine("File exists: {0}", conn.EndFileExists(ar));
}
catch (Exception ex) {
Console.WriteLine(ex.ToString());
}
finally {
m_reset.Set();
}
}
}
}
|
See Also
