VB.NET

Download a Zip from a URL and OpenBd. (No .zip file is created)

See more Zip Examples

Demonstrates how to download a .zip from a URL, opens the Zip, and gets the contents of a file. No file is ever written. VB.NET

Dim success As Boolean = False

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim http As New Chilkat.Http

Dim bd As New Chilkat.BinData

' This URL is valid and can be tested...
success = http.QuickGetBd("https://chilkatdownload.com/example_data/hamlet.zip",bd)
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim zip As New Chilkat.Zip

' Open the zip from the bytes contained in bd.
success = zip.OpenBd(bd)
If (success = False) Then
    Debug.WriteLine(zip.LastErrorText)
    Exit Sub
End If


' Get the entry for the file we want..
Dim entry As New Chilkat.ZipEntry
success = zip.EntryOf("hamlet.xml",entry)
If (success = False) Then
    Debug.WriteLine(zip.LastErrorText)
    Exit Sub
End If


' Convert all line endings to CRLF (if needed)
Dim lineEndingBehavior As Integer = 2
Dim xmlStr As String = entry.UnzipToString(lineEndingBehavior,"utf-8")
If (entry.LastMethodSuccess = False) Then
    Debug.WriteLine(entry.LastErrorText)
    Exit Sub
End If


' The XML in this case is about 274K, so let's just examine the last 20 lines...
Dim sb As New Chilkat.StringBuilder
sb.Append(xmlStr)

Debug.WriteLine(sb.LastNLines(20,True))