Create function.vb

function.vb

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+Public Function Fatturazione_elettronica(ByVal azione As String, ByVal xml As String)
+
+        Dim api_url As String = “https://www.app.fattura24.com/api/v0.3”
+
+        Dim efatt_api_key = “YOUR_KEY”
+
+        Select Case azione
+            Case "test"
+                api_url = api_url + "/TestKey"
+            Case "crea"
+                api_url = api_url + "/SaveDocument"
+        End Select
+
+        Debug.WriteLine("api_url: " + api_url)
+
+        ' Create a request using a URL that can receive a post. 
+        Dim request As WebRequest = WebRequest.Create(api_url)
+
+        ' Set the Method property of the request to POST.
+        request.Method = "POST"
+
+       ' Create POST data and convert it to a byte array.
+         Dim postdata As String
+        postdata = "apiKey=" & efatt_api_key
+
+
+        Select Case azione
+            Case "crea"
+
+                Dim xml_encoded = WebUtility.UrlEncode(xml)
+                postdata = postdata & "&xml=" & xml_encoded
+
+        End Select
+
+
+        Dim byteArray As Byte() = Encoding.UTF8.GetBytes(postdata)
+
+
+        ' Set the ContentType property of the WebRequest.
+        request.ContentType = "application/x-www-form-urlencoded"
+
+        ' Set the ContentLength property of the WebRequest.
+
+        request.ContentLength = System.Text.Encoding.UTF8.GetBytes(postdata).Length
+
+
+        ' Get the request stream.
+        Dim dataStream As Stream = request.GetRequestStream()
+
+        ' Write the data to the request stream.
+        dataStream.Write(byteArray, 0, byteArray.Length)
+
+        ' Close the Stream object.
+        dataStream.Close()
+
+        ' Get the response.
+        Dim response As WebResponse = request.GetResponse()
+
+        ' Display the status.
+        Debug.WriteLine("status: " + CType(response, HttpWebResponse).StatusDescription)
+
+        ' Get the stream containing content returned by the server.
+        dataStream = response.GetResponseStream()
+
+        ' Open the stream using a StreamReader for easy access.
+        Dim reader As New StreamReader(dataStream)
+
+        ' Read the content.
+        Dim responseFromServer As String = reader.ReadToEnd()
+
+        ' Display the content.
+        Debug.WriteLine("responseFromServer: " + responseFromServer)
+
+
+        Dim ResponseText As String
+
+        Select Case azione
+            Case "test"
+
+                Dim Tags As List(Of String) = Get_HTMLTag("description", responseFromServer)
+
+                'You can loop through the list to view all of the results
+                For Each Tag As String In Tags
+                    MsgBox(Tag)
+                Next
+
+
+            Case "crea"
+
+                Dim MyDoc As New System.Xml.XmlDocument
+                MyDoc.LoadXml(responseFromServer)
+                ResponseText = MyDoc.SelectSingleNode("//root/description").InnerText
+                Dim docId = MyDoc.SelectSingleNode("//root/docId").InnerText
+                Dim docNumber = MyDoc.SelectSingleNode("//root/docNumber").InnerText
+                MsgBox(ResponseText & ": " & docId & ", nr: " & docNumber)
+
+        End Select
+
+        ' Clean up the streams.
+        reader.Close()
+        dataStream.Close()
+        response.Close()
+
+
+
+
+    End Function
+
+'Questa funzione è necessaria perché VB.NET dà errore quando trova caratteri accentati nella risposta di Fattura24
+    Private Function Get_HTMLTag(ByVal TagName As String, ByVal HTML As String) As List(Of String)
+        Dim lMatch As New List(Of String) 'Get the results in a List of strings
+
+        'RegexOptions.IgnoreCase allows case mismatch e.g. if TagName="title" results can include "title", "Title", "TITLE" etc.
+        'RegexOptions.Singleline allows .* to see past CarriageReturn characters 
+        Dim Tag As New Regex("(?<=<" & TagName & ">).*(?=<\/" & TagName & ">)", RegexOptions.IgnoreCase Or RegexOptions.Singleline)
+        For Each rMatch As Match In Tag.Matches(HTML)
+            lMatch.Add(rMatch.Value)
+        Next
+
+        Return lMatch
+    End Function