VB.NET get the size of a file(Downloading in FTP Server)

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I have a code for downloading a file from a FTP Server:

VB

Dim outputStream As New FileStream(filePath + fileName, FileMode.Create)
Dim reqFTP As FtpWebRequest = DirectCast(FtpWebRequest.Create(New Uri(FTP + fileName)), FtpWebRequest)
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile
reqFTP.UseBinary = True
reqFTP.Credentials = New NetworkCredential(UserID, Password)
response = DirectCast(reqFTP.GetResponse(), FtpWebResponse)
ftpStream = response.GetResponseStream()
Dim cl As Long = response.ContentLength

Before start t download, I want to get the file size of the file selected by the user.
But when I'm using Dim cl As Long = response.ContentLength and displaying its value to MsgBox the value is -1, but the size of a file when download is finish the size is the same as in FTP Server.

Posted 3-Jun-11 0:38am

hansoctantan

Updated 3-Jun-11 2:34am

v3

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CPallini · Accepted Answer · 2011-06-03T03:01:00

Solution 1

hansoctantan wrote:
But when I'm using Dim cl As Long = response.ContentLength and displaying its value to MsgBox the value is -1, but the size of a file when download is finish the size is the same as in FTP Server.A

That's correct, since you haven't downloaded any data yet.

You should use the GetFileSize[^] field to know in advance the selected file size.

Posted 3-Jun-11 3:01am

CPallini

Comments

hansoctantan 3-Jun-11 9:55am

When I'm using
Const GetFileSize As String = WebRequestMethods.Ftp.GetFileSize
MsgBox(GetFileSize)
The result is "SIZE".

hansoctantan 3-Jun-11 10:11am

I get it now, before downloading I must use
reqFTP.Method = WebRequestMethods.Ftp.GetFileSize
then the "response.ContentLength" will show its file size

Am I Right???

CPallini 3-Jun-11 12:01pm

Much better, I guess.