Lost on how you would upload a file in VB.net

DJ Matthews

Hi all, I've been researching how to upload a file to a web server. I've found lots of articles about it (most here at CodeProject), but I'm having some problems with my code. Everytime I run the code I get the following error: The remote server returned an error: (404) Not Found. My Code:

    Dim responseArray As Byte()
    Try
        Dim WC As New System.Net.WebClient
        responseArray = WC.UploadFile("http://someserver/Uploads/upload.aspx", "POST",  "\\myfile.doc")
        txtResponce.Text = "Check the file at " + Encoding.ASCII.GetString(responseArray)
    Catch ex As Exception
        MsgBox(ex.ToString)
    End Try

What I don't understand is what "upload.aspx" is there for. There is never any code to go with it, so I'm not sure what it's there for.(MSDN has this same example, no code to upload.aspx). I've taken the "upload.aspx" out and I get the same error. I've given the ASPNET and ISS user accounts read/write access to the folder, so I'm sure it's not a permission problem. Can ANYONE explain what I'm doing wrong?

Lost User

upload.aspx would be the webpage that would accept your file. The 404 error means you are trying to communicate to a server (or a document on a server) that does not exist.

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DJ Matthews

Ok, I finally figured it out. There is a property called Request.Files, It holds all of the data on the files that are being uploaded to that page. You can then loop through it and save the files to the web server. Code for anyone interested:

Partial Class _Default
Inherits System.Web.UI.Page

Protected Sub Page\_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    If Me.Request.Files.Count <> 0 then
        Dim I As Integer
        For I = 0 To Me.Request.Files.Count - 1
            Me.Request.Files.Item(I).SaveAs("C:\\some\\path\\Uploads\\" & Me.Request.Files.Item(I).FileName)
        Next
    End If


End Sub

End Class

I'm not sure that's the best way to go about it, but it works! I think I may write up an article about this as I couldn't find this information easily ANYWHERE.