(VB.NET) WaTrend Send WhatsApp Text

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Send a WhatsApp text.

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

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

Dim http As New Chilkat.Http
Dim success As Boolean

' Use your actual access token instead of 555555555555555555555555555555
Dim req As New Chilkat.HttpRequest
req.AddParam("number","84933313xxx")
req.AddParam("type","text")
req.AddParam("message","This is a test message")
req.AddParam("instance_id","609ACF283XXXX")
req.AddParam("access_token","555555555555555555555555555555")


' Note: The WaTrend online documentation indicate a POST should be used.
' However, it seems you might actually need to send a GET request.
' It is unclear.  
' If a GET is neeed, you would just send to the URL w/ query params like this:
Dim sbUrl As New Chilkat.StringBuilder
sbUrl.Append("https://app.watrend.com/api/send.php?")
sbUrl.Append(req.GetUrlEncodedParams())
Dim responseBodyStr As String = http.QuickGetStr(sbUrl.GetAsString())
' The responseBodyStr contains the JSON response from the server..


' If a POST is needed, then it is sent like this:
Dim resp As Chilkat.HttpResponse = http.PostUrlEncoded("https://app.watrend.com/api/send.php",req)
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim sbResponseBody As New Chilkat.StringBuilder
resp.GetBodySb(sbResponseBody)

Dim respStatusCode As Integer = resp.StatusCode
Debug.WriteLine("Response Status Code = " & respStatusCode)
If (respStatusCode >= 400) Then
    Debug.WriteLine("Response Header:")
    Debug.WriteLine(resp.Header)
    Debug.WriteLine("Failed.")

    Exit Sub
End If


Debug.WriteLine(resp.BodyStr)

' Both success and failed responses use 200 status code.

' A success response contains this JSON in the response body:
' {"status":"success", ... }

' A failed response will contain something like this:
' {"status":"error","message":"License Invalidated"}


Dim jResp As New Chilkat.JsonObject
jResp.LoadSb(sbResponseBody)

Dim status As String = jResp.StringOf("status")
Debug.WriteLine("status: " & status)