Get data with post method using webclient

Question

Hello

There's a POST sample at the bottom of this page:

https://ws.interfax.net/admin.asmx?op=GetAccountPPCardsBalance2

Sample HTTP POST request and response. The placeholders shown need to be replaced with actual values.

POST /admin.asmx/GetAccountPPCardsBalance2 HTTP/1.1

Host: ws.interfax.net

Content-Type: application/x-www-form-urlencoded

Content-Length: length

PrimaryUsername=string&PrimaryPassword=string

I've no idea how to figure it out using a webclient and get the data back which is an integer number.

Anyone can help please?

Thanks in advance

Answer 1

Hi @StewartBW ,

Check the following steps.

1. Create an instance of HttpClient to manage the HTTP communication.
2. Use StringContent class to prepare the request body with the necessary form URL-encoded parameters (PrimaryUsername and PrimaryPassword).
3. Use PostAsync method to send the POST request to the specified URL.
4. Use the XDocument class to resolve Balance and ResultCode from the responding XML.

        Dim url As String = "https://ws.interfax.net/admin.asmx/GetAccountPPCardsBalance2"
        Dim primaryUsername As String = "your_primary_username"
        Dim primaryPassword As String = "your_primary_password"

        Using client As New HttpClient()
            Dim content As New StringContent($"PrimaryUsername={primaryUsername}&PrimaryPassword={primaryPassword}", Encoding.UTF8, "application/x-www-form-urlencoded")

            Dim response As HttpResponseMessage = Await client.PostAsync(url, content)

            response.EnsureSuccessStatusCode()

            Dim responseContent As String = Await response.Content.ReadAsStringAsync()

            Dim doc As XDocument = XDocument.Parse(responseContent)
            Dim ns As XNamespace = "http://interfax.net/Admin"

            Dim balance As Decimal = Decimal.Parse(doc.Root.Element(ns + "Balance").Value)
            Dim resultCode As Integer = Integer.Parse(doc.Root.Element(ns + "ResultCode").Value)
        End Using

Best Regards.

Jiachen Li

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