get the downloading file size in vb.net

Question

I designed a download manager in vb.net, but I don't know how to get file size after downloading started, or when I put the url.

I searched on internet and here, and I found the httpwebrequest class, but I don't know how does it work and how can I add it in my project.

possible duplicate of [Get file size before download it in vb](http://stackoverflow.com/questions/32269919/get-file-size-before-download-it-in-vb) — Drarig29, Sep 06 '15 at 12:52
i see that before but i don't know how to use the code `webrequest` — Pro-Fun, Sep 06 '15 at 12:55
Use [this solution](http://stackoverflow.com/a/32340260/3970387). — Drarig29, Sep 06 '15 at 12:59
I See The Code, But I Don't Know How To Display The Return Value In TextBox — Pro-Fun, Sep 06 '15 at 13:06
Use `TextBox1.Text = GetDownloadSize("http://www.foo.com/file.mp3")` — Drarig29, Sep 06 '15 at 13:09

score 0 · Accepted Answer · edited May 23 '17 at 12:22

Use this function :

Public Function GetDownloadSize(ByVal URL As String) As Long
    Dim r As Net.WebRequest = Net.WebRequest.Create(URL)
    r.Method = Net.WebRequestMethods.Http.Head
    Using rsp = r.GetResponse()
        Return rsp.ContentLength
    End Using
End Function

Here's an easy example of use :

MsgBox(Math.Round(GetDownloadSize("http://www.foo.com/file.mp3") / 1024 / 1024, 2) & " MB")

Source : https://stackoverflow.com/a/32340260/3970387

get the downloading file size in vb.net

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