(VB.NET UWP/WinRT) Asynchronous HTTP Upload

Demonstrates how to do an HTTP upload asynchronously in a background thread.

A server-side C# example showing how to receive an upload is located at C# ASP.NET Code to Receive Upload

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

Dim upload As New Chilkat.Upload

' Specify the page (ASP, ASP.NET, Perl, Python, Ruby, CGI, etc)
' that will process the HTTP Upload.
upload.Hostname = "www.mywebserver.com"
upload.Path = "/receiveUpload.aspx"

' Add one or more files to be uploaded.
upload.AddFileReference("file1","dude.gif")
upload.AddFileReference("file2","pigs.xml")
upload.AddFileReference("file3","sample.doc")

' Begin the HTTP upload in a background thread:
Dim success As Boolean = upload.BeginUpload()
If (success <> True) Then
    Debug.WriteLine(upload.LastErrorText)
Else
    Debug.WriteLine("Upload started...")
End If


' Wait for the upload to finish.
' Print the progress as we wait...
While (upload.UploadInProgress = True)
    ' We can abort the upload at any point by calling:
    ' upload.AbortUpload();

    ' Display the percentage complete and the number of bytes uploaded so far..
    ' The total upload size will become set after the upload begins:
    Debug.WriteLine(upload.PercentUploaded & "% " & upload.NumBytesSent & "/" & upload.TotalUploadSize)

    ' Sleep 2/10ths of a second.
    upload.SleepMs(200)

End While

' Did the upload succeed?
If (upload.UploadSuccess = True) Then
    Debug.WriteLine("Files uploaded!")
Else
    Debug.WriteLine(upload.LastErrorText)
End If