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How to: Download a File in Visual Basic. To download a file, supplying a user name and password. The FTP protocol used by the DownLoadFile method sends. In this article I will explain with an example, how to download Files from FTP Web Server in ASP.Net using C# and VB.Net. An ASP.Net GridView with a Download button will display the list of files from the FTP folder and when the Download button is clicked, the file will be downloaded from FTP folder.
In these days of Azure and The Cloud this post might seem to be a bit out of date, but if you want to access files on your web hosting service then here’s how you can do it with FTP. Uploading Here’s a method that takes the four key pieces of information: The name of the file to be uploaded The web address of the ftp server on your web host Your FTP username on your web host The FTP Password I’ve been surprised at how many examples only cover cases where Anonymous FTP is allowed. I’m not sure that’s very realistic in a scenario where you are uploading your personal files. Cinta mati vino g bastian. Anyway, here’s the method that takes those four parameters. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Private Sub FtpUploadFile( ByVal filetoupload As String, ByVal ftpuri As String, ByVal ftpusername As String, ByVal ftppassword As String) ' Create a web request that will be used to talk with the server and set the request method to upload a file by ftp.
Dim ftpRequest As FtpWebRequest = CType(WebRequest.Create(ftpuri), FtpWebRequest) Try ftpRequest.Method = WebRequestMethods.Ftp.UploadFile ' Confirm the Network credentials based on the user name and password passed in. FtpRequest.Credentials = New NetworkCredential(ftpusername, ftppassword) ' Read into a Byte array the contents of the file to be uploaded Dim bytes As Byte = System.IO.File.ReadAllBytes(filetoupload) ' Transfer the byte array contents into the request stream, write and then close when done. FtpRequest.ContentLength = bytes.Length Using UploadStream As Stream = ftpRequest.GetRequestStream UploadStream.Write(bytes, 0, bytes.Length) UploadStream.Close End Using Catch ex As Exception MessageBox.Show(ex.Message) Exit Sub End Try MessageBox.Show( 'Process Complete') End Sub As you can see from the comments, a WebRequest is created and the FTP UploadFile method is called. Then the web credentials are passed in to be checked by the web host.
The contents of the file are read into a Byte Array and then streamed up to the server. The Try Catch block is advisable to warn the user if something has gone wrong. The final Message Box confirms that the process has completed, hopefully successfully. When you create your method to call the method shown above, the only thing that might cause confusion is the ftpuri parameter. This should in the following format: “ftp://www.yourwebsitename.com/yourfilename.fileextension” Downloading The method for downloading is fairly similar. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Private Sub FTPDownloadFile( ByVal downloadpath As String, ByVal ftpuri As String, ByVal ftpusername As String, ByVal ftppassword As String) 'Create a WebClient.
Dim request As New WebClient ' Confirm the Network credentials based on the user name and password passed in.