Retrieve and display Image from FTP folder using C# and VB.Net in ASP.Net

Hi Dev@KKM,

Check with the below code.

C#

protected void Page_Load(object sender, EventArgs e)
{
    //FTP Server URL.
    string ftp = "ftp://yourserver.com/";

    //FTP Folder name. Leave blank if you want to list files from root folder.
    string ftpFolder = "Uploads/";
    try
    {
        string fileName = "Desert.jpg";
        //Create FTP Request.
        FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftp + ftpFolder + fileName);
        request.Method = WebRequestMethods.Ftp.DownloadFile;

        //Enter FTP Server credentials.
        request.Credentials = new NetworkCredential("Username", "Password");
        request.UsePassive = true;
        request.UseBinary = true;
        request.EnableSsl = false;

        //Fetch the Response and read it into a MemoryStream object.
        FtpWebResponse response = (FtpWebResponse)request.GetResponse();
        using (MemoryStream stream = new MemoryStream())
        {
            response.GetResponseStream().CopyTo(stream);
            string base64String = Convert.ToBase64String(stream.ToArray(), 0, stream.ToArray().Length);
            Image1.ImageUrl = "data:image/png;base64," + base64String;
        }          
    }
    catch (WebException ex)
    {
        throw new Exception((ex.Response as FtpWebResponse).StatusDescription);
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    'FTP Server URL.
    Dim ftp As String = "ftp://yourserver.com/"
    'FTP Folder name. Leave blank if you want to list files from root folder.
    Dim ftpFolder As String = "Uploads/"
    Try
        Dim fileName As String = "Desert.jpg"
        'Create FTP Request.
        Dim request As FtpWebRequest = CType(WebRequest.Create(ftp & ftpFolder & fileName), FtpWebRequest)
        request.Method = WebRequestMethods.Ftp.DownloadFile
        'Enter FTP Server credentials.
        request.Credentials = New NetworkCredential("Username", "Password")
        request.UsePassive = True
        request.UseBinary = True
        request.EnableSsl = False
        'Fetch the Response and read it into a MemoryStream object.
        Dim response As FtpWebResponse = CType(request.GetResponse(), FtpWebResponse)
        Using stream As MemoryStream = New MemoryStream()
            response.GetResponseStream().CopyTo(stream)
            Dim base64String As String = Convert.ToBase64String(stream.ToArray(), 0, stream.ToArray().Length)
            Image1.ImageUrl = "data:image/png;base64," & base64String
        End Using
    Catch ex As WebException
        Throw New Exception((TryCast(ex.Response, FtpWebResponse)).StatusDescription)
    End Try
End Sub