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Overview and how to use Ultimate Ftp in Visual Studio
Connect to an FTP server
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Upload and download a single file
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Upload and download multiple files
Manage a single remote file
Manage multiple remote files and directories
Upload and download a directory
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Manage a remote directory
Unified API for SFTP and FTP
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Using FtpWebRequest
Control bandwidth and speed optimization
Events
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Determine local PC and server time difference
Use asynchronous methods
Use path utility methods
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Class Reference
- ComponentPro
- ComponentPro.Collections
- ComponentPro.Compression
- ComponentPro.Diagnostics
- ComponentPro.IO
- ComponentPro.IO.Synchronization
- ComponentPro.Net
- ComponentPro.Security
- ComponentPro.Security.Authentication
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- ComponentPro.Security.Cryptography
- ComponentPro.Security.Cryptography.Pkcs

ComponentPro UltimateFtp

DirectoryExistsCompleted Event

Class Reference > ComponentPro.IO Namespace > FileSystem Class > DirectoryExistsCompleted Event

Occurs when an asynchronous DirectoryExistsAsync operation completes.

Syntax

public event ExtendedAsyncCompletedEventHandler<TResult> DirectoryExistsCompleted

Public Event DirectoryExistsCompleted ExtendedAsyncCompletedEventHandler(Of TResult)

public:
 event ExtendedAsyncCompletedEventHandler<TResult>^ DirectoryExistsCompleted

Examples

FTP Examples

Shows how to use DirectoryExistsAsync method to asynchronously determine whether a directory exists (Task-based approach).

Copy Code

VB.NET

using System;
using ComponentPro.IO;
using ComponentPro.Net;
using ComponentPro;

...

// Create a new class instance.
Ftp client = new Ftp();

// Connect to the FTP server.
client.Connect("myserver");

// Authenticate.
client.Authenticate("userName", "password");

// ... 
 
// Determine whether folder 'myFolder' exists or not. 
bool exists = await client.DirectoryExistsAsync("/myFolder");

// ... 
 
if (exists)
    Console.WriteLine("Folder '/myFolder' exists");
else 
    Console.WriteLine("Folder '/myFolder' does not exist");

// Disconnect.
client.Disconnect();

Imports ComponentPro.IO
Imports ComponentPro.Net
Imports ComponentPro

...

' Create a new class instance. 
Dim client As New Ftp()

' Connect to the FTP server.
client.Connect("myserver")

' Authenticate.
client.Authenticate("userName", "password")

' ... 
 
' Determine whether folder 'myFolder' exists or not. 
Dim exists As Boolean = Await client.DirectoryExistsAsync("/myFolder")

' ... 
 
If exists Then 
    Console.WriteLine("Folder '/myFolder' exists")
Else 
    Console.WriteLine("Folder '/myFolder' does not exist")
End If 
 
' Disconnect.
client.Disconnect()

Shows how to use DirectoryExistsAsync method to asynchronously determine whether a directory exists (Event-based approach).

Copy Code

VB.NET

using System;
using ComponentPro.IO;
using ComponentPro.Net;
using ComponentPro;

...

static void Main()
{
    // Create a new class instance. 
    Ftp client = new Ftp();

    client.DirectoryExistsCompleted += client_DirectoryExistsCompleted;

    // Connect to the FTP server. 
    client.Connect("myserver");

    // Authenticate. 
    client.Authenticate("userName", "password");

    // ... 
 
    // Determine whether folder 'myFolder' exists or not. 
    client.DirectoryExistsAsync("/myFolder");

    // ... 
 
    // Disconnect. 
    client.Disconnect();
}

static void client_DirectoryExistsCompleted(object sender, ExtendedAsyncCompletedEventArgs<bool> e)
{
    // Ftp client = (Ftp)sender; 
    if (e.Error != null)
    {
        Console.WriteLine("Error: " + e.Error.ToString());
        return;
    }

    bool exists = e.Result;

    if (exists)
        Console.WriteLine("Folder '/myFolder' exists");
    else 
        Console.WriteLine("Folder '/myFolder' does not exist");
}

Imports ComponentPro.IO
Imports ComponentPro.Net
Imports ComponentPro

...

Shared Sub Main()
    ' Create a new class instance. 
    Dim client As New Ftp()

    AddHandler client.DirectoryExistsCompleted, AddressOf client_DirectoryExistsCompleted

    ' Connect to the FTP server. 
    client.Connect("myserver")

    ' Authenticate. 
    client.Authenticate("userName", "password")

    ' ... 
 
    ' Determine whether folder 'myFolder' exists or not. 
    client.DirectoryExistsAsync("/myFolder")

    ' ... 
 
    ' Disconnect. 
    client.Disconnect()
End Sub 
 
Private Shared Sub client_DirectoryExistsCompleted(ByVal sender As Object, ByVal e As ExtendedAsyncCompletedEventArgs(Of Boolean))
    ' Ftp client = (Ftp)sender; 
    If e.Error IsNot Nothing Then 
        Console.WriteLine("Error: " & e.Error.ToString())
        Return 
    End If 
 
    Dim exists As Boolean = e.Result

    If exists Then 
        Console.WriteLine("Folder '/myFolder' exists")
    Else 
        Console.WriteLine("Folder '/myFolder' does not exist")
    End If 
End Sub

SFTP Examples

Shows how to use DirectoryExistsAsync method to asynchronously determine whether a directory exists (Task-based approach).

Copy Code

VB.NET

using System;
using ComponentPro.IO;
using ComponentPro.Net;
using ComponentPro;

...

// Create a new class instance.
Sftp client = new Sftp();

// Connect to the SFTP server.
client.Connect("myserver");

// Authenticate.
client.Authenticate("userName", "password");

// ... 
 
// Determine whether folder 'myFolder' exists or not. 
bool exists = await client.DirectoryExistsAsync("/myFolder");

// ... 
 
if (exists)
    Console.WriteLine("Folder '/myFolder' exists");
else 
    Console.WriteLine("Folder '/myFolder' does not exist");

// Disconnect.
client.Disconnect();

Imports ComponentPro.IO
Imports ComponentPro.Net
Imports ComponentPro

...

' Create a new class instance. 
Dim client As New Sftp()

' Connect to the SFTP server.
client.Connect("myserver")

' Authenticate.
client.Authenticate("userName", "password")

' ... 
 
' Determine whether folder 'myFolder' exists or not. 
Dim exists As Boolean = Await client.DirectoryExistsAsync("/myFolder")

' ... 
 
If exists Then 
    Console.WriteLine("Folder '/myFolder' exists")
Else 
    Console.WriteLine("Folder '/myFolder' does not exist")
End If 
 
' Disconnect.
client.Disconnect()

Shows how to use DirectoryExistsAsync method to asynchronously determine whether a directory exists (Event-based approach).

Copy Code

VB.NET

using System;
using ComponentPro.IO;
using ComponentPro.Net;
using ComponentPro;

...

static void Main()
{
    // Create a new class instance. 
    Sftp client = new Sftp();

    client.DirectoryExistsCompleted += client_DirectoryExistsCompleted;

    // Connect to the SFTP server. 
    client.Connect("myserver");

    // Authenticate. 
    client.Authenticate("userName", "password");

    // ... 
 
    // Determine whether folder 'myFolder' exists or not. 
    client.DirectoryExistsAsync("/myFolder");

    // ... 
 
    // Disconnect. 
    client.Disconnect();
}

static void client_DirectoryExistsCompleted(object sender, ExtendedAsyncCompletedEventArgs<bool> e)
{
    // Sftp client = (Sftp)sender; 
    if (e.Error != null)
    {
        Console.WriteLine("Error: " + e.Error.ToString());
        return;
    }

    bool exists = e.Result;

    if (exists)
        Console.WriteLine("Folder '/myFolder' exists");
    else 
        Console.WriteLine("Folder '/myFolder' does not exist");
}

Imports ComponentPro.IO
Imports ComponentPro.Net
Imports ComponentPro

...

Shared Sub Main()
    ' Create a new class instance. 
    Dim client As New Sftp()

    AddHandler client.DirectoryExistsCompleted, AddressOf client_DirectoryExistsCompleted

    ' Connect to the SFTP server. 
    client.Connect("myserver")

    ' Authenticate. 
    client.Authenticate("userName", "password")

    ' ... 
 
    ' Determine whether folder 'myFolder' exists or not. 
    client.DirectoryExistsAsync("/myFolder")

    ' ... 
 
    ' Disconnect. 
    client.Disconnect()
End Sub 
 
Private Shared Sub client_DirectoryExistsCompleted(ByVal sender As Object, ByVal e As ExtendedAsyncCompletedEventArgs(Of Boolean))
    ' Sftp client = (Sftp)sender; 
    If e.Error IsNot Nothing Then 
        Console.WriteLine("Error: " & e.Error.ToString())
        Return 
    End If 
 
    Dim exists As Boolean = e.Result

    If exists Then 
        Console.WriteLine("Folder '/myFolder' exists")
    Else 
        Console.WriteLine("Folder '/myFolder' does not exist")
    End If 
End Sub

Framework

.NET Compact Framework

Supported version: 2.0, 3.5, and 3.9
Assembly: ComponentPro.FileSystem.CF (in ComponentPro.FileSystem.CF.dll)

.NET Framework

Supported version: 2.0, 3.0, 3.5, 4.0, 4.5.x, 4.6.x and later
Assembly: ComponentPro.FileSystem (in ComponentPro.FileSystem.dll)

Portable Class Library for Windows Phone 8.1 and Windows 8.1 Store Apps

Supported version: 4.6.x and later
Assembly: ComponentPro.FileSystem.WinPcl (in ComponentPro.FileSystem.WinPcl.dll)

Universal Windows Platform (includes Windows 10 Mobile, Windows 10 Store Apps and Windows 10 IoT)

Supported version: 4.6.x and later
Assembly: ComponentPro.FileSystem.Uwp (in ComponentPro.FileSystem.Uwp.dll)

Xamarin Android

Supported version: 2.3 and later
Assembly: ComponentPro.FileSystem.Android (in ComponentPro.FileSystem.Android.dll)

Xamarin Mac

Supported version: 2.0.x and later
Assembly: ComponentPro.FileSystem.Mac (in ComponentPro.FileSystem.Mac.dll)

Xamarin iOS

Supported version: 5.1.x and later
Assembly: ComponentPro.FileSystem.iOS (in ComponentPro.FileSystem.iOS.dll)

DirectoryExistsCompleted Event

Syntax

Examples

FTP Examples

SFTP Examples

Framework

.NET Compact Framework

.NET Framework

Portable Class Library for Windows Phone 8.1 and Windows 8.1 Store Apps

Universal Windows Platform (includes Windows 10 Mobile, Windows 10 Store Apps and Windows 10 IoT)

Xamarin Android

Xamarin Mac

Xamarin iOS

See Also

Reference