(VB.NET) Magyar Nemzeti Bank (MNB) Get Currencies

The Magyar Nemzeti Bank (MNB) is the central bank of Hungary. In this role, its primary objective is to achieve and maintain price stability. The MNB website is available to visitors in both Hungarian and English. The MNB provides the Arfolyam (trans. Exchange Rate) API, which can be used to retrieve current and historic currency exchange rates. This service uses SOAP calls issued in XML format.

This example gets a list of currencies.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

Dim rest As New Chilkat.Rest
Dim success As Boolean

' URL: http://www.mnb.hu/arfolyamok.asmx
Dim bTls As Boolean = False
Dim port As Integer = 80
Dim bAutoReconnect As Boolean = True
success = rest.Connect("www.mnb.hu",port,bTls,bAutoReconnect)
If (success <> True) Then
    Debug.WriteLine("ConnectFailReason: " & rest.ConnectFailReason)
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


' --------------------------------------------------------------------------------
' Also see Chilkat's Online WSDL Code Generator
' to generate code and SOAP Request and Response XML for each operation in a WSDL.
' --------------------------------------------------------------------------------

Dim xml As New Chilkat.Xml
xml.Tag = "soapenv:Envelope"
xml.AddAttribute("xmlns:soapenv","http://schemas.xmlsoap.org/soap/envelope/")
xml.AddAttribute("xmlns:web","http://www.mnb.hu/webservices/")
xml.UpdateChildContent("soapenv:Header","")
xml.UpdateChildContent("soapenv:Body|web:GetCurrencies","")

rest.AddHeader("Content-Type","text/xml")
rest.AddHeader("SOAPAction","/webservices/MNBArfolyamServiceSoap/GetCurrencies")
rest.AddHeader("Accept","application/xml")

Dim sbRequestBody As New Chilkat.StringBuilder
xml.GetXmlSb(sbRequestBody)
Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestSb("POST","/arfolyamok.asmx",sbRequestBody,sbResponseBody)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If

Dim respStatusCode As Integer = rest.ResponseStatusCode
If (respStatusCode >= 400) Then
    Debug.WriteLine("Response Status Code = " & respStatusCode)
    Debug.WriteLine("Response Header:")
    Debug.WriteLine(rest.ResponseHeader)
    Debug.WriteLine("Response Body:")
    Debug.WriteLine(sbResponseBody.GetAsString())
    Exit Sub
End If


Debug.WriteLine("response status code = " & respStatusCode)

Dim xmlResponse As New Chilkat.Xml
xmlResponse.LoadSb(sbResponseBody,True)
Debug.WriteLine(xmlResponse.GetXml())

' The XML response contains this:
' <?xml version="1.0" encoding="utf-8" ?>
' <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
'     <s:Body>
'         <GetCurrenciesResponse xmlns="http://www.mnb.hu/webservices/" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
'             <GetCurrenciesResult>&lt;MNBCurrencies&gt;&lt;Currencies&gt;&lt;Curr&gt;HUF&lt;/Curr&gt;&lt;Curr&gt;EUR&lt;/Curr&gt;&lt;Curr&gt;AUD&lt;/Curr&gt; ... &lt;/MNBCurrencies&gt;</GetCurrenciesResult>
'         </GetCurrenciesResponse>
'     </s:Body>
' </s:Envelope>

' Get the GetCurrenciesResult
Dim resultEncoded As String = xmlResponse.GetChildContent("s:Body|GetCurrenciesResponse|GetCurrenciesResult")
Debug.WriteLine(resultEncoded)

' Entity decode the result to get XML.
Dim sbResult As New Chilkat.StringBuilder
sbResult.Append(resultEncoded)
sbResult.EntityDecode()

' Load it into XML.
Dim xmlResult As New Chilkat.Xml
xmlResult.LoadSb(sbResult,True)
Debug.WriteLine(xmlResult.GetXml())

' The result is this:

' <?xml version="1.0" encoding="utf-8" ?>
' <MNBCurrencies>
'     <Currencies>
'         <Curr>HUF</Curr>
'         <Curr>EUR</Curr>
'         <Curr>AUD</Curr>
'         <Curr>BGN</Curr>
'         <Curr>BRL</Curr>
'         <Curr>CAD</Curr>
'         <Curr>CHF</Curr>
'         <Curr>CNY</Curr>
'         <Curr>CZK</Curr>
'         <Curr>DKK</Curr>
'         <Curr>GBP</Curr>
'         <Curr>HKD</Curr>
'         <Curr>HRK</Curr>
'         <Curr>IDR</Curr>
'         <Curr>ILS</Curr>
'         <Curr>INR</Curr>
'         <Curr>ISK</Curr>
'         <Curr>JPY</Curr>
'         <Curr>KRW</Curr>
'         <Curr>MXN</Curr>
'         <Curr>MYR</Curr>
'         <Curr>NOK</Curr>
'         <Curr>NZD</Curr>
'         <Curr>PHP</Curr>
'         <Curr>PLN</Curr>
'         <Curr>RON</Curr>
'         <Curr>RSD</Curr>
'         <Curr>RUB</Curr>
'         <Curr>SEK</Curr>
'         <Curr>SGD</Curr>
'         <Curr>THB</Curr>
'         <Curr>TRY</Curr>
'         <Curr>UAH</Curr>
'         <Curr>USD</Curr>
'         <Curr>ZAR</Curr>
'         <Curr>ATS</Curr>
'         <Curr>AUP</Curr>
'         <Curr>BEF</Curr>
'         <Curr>BGL</Curr>
'         <Curr>CYN</Curr>
'         <Curr>CSD</Curr>
'         <Curr>CSK</Curr>
'         <Curr>DDM</Curr>
'         <Curr>DEM</Curr>
'         <Curr>EEK</Curr>
'         <Curr>EGP</Curr>
'         <Curr>ESP</Curr>
'         <Curr>FIM</Curr>
'         <Curr>FRF</Curr>
'         <Curr>GHP</Curr>
'         <Curr>GRD</Curr>
'         <Curr>IEP</Curr>
'         <Curr>ITL</Curr>
'         <Curr>KPW</Curr>
'         <Curr>KWD</Curr>
'         <Curr>LBP</Curr>
'         <Curr>LTL</Curr>
'         <Curr>LUF</Curr>
'         <Curr>LVL</Curr>
'         <Curr>MNT</Curr>
'         <Curr>NLG</Curr>
'         <Curr>OAL</Curr>
'         <Curr>OBL</Curr>
'         <Curr>OFR</Curr>
'         <Curr>ORB</Curr>
'         <Curr>PKR</Curr>
'         <Curr>PTE</Curr>
'         <Curr>ROL</Curr>
'         <Curr>SDP</Curr>
'         <Curr>SIT</Curr>
'         <Curr>SKK</Curr>
'         <Curr>SUR</Curr>
'         <Curr>VND</Curr>
'         <Curr>XEU</Curr>
'         <Curr>XTR</Curr>
'         <Curr>YUD</Curr>
'     </Currencies>
' </MNBCurrencies>
'