Cómo enviar un mensaje por la API de WhatsApp usando vbnet

Introducción

En este tutorial, crearemos una página para enviar mensajes de WhatsApp a través de WhatsAppAPI usando vb.net

Primer mensaje de la API de WhatsApp usando Visual Basic.NET

Imports System 
Imports System.Net
Imports System.Text
Imports System.IO
Imports System.Web

Module base64  
    Sub Main()  
        Dim WebRequest As HttpWebRequest
        Dim instance_id as string ="instance1150"
        Dim token as string  ="1g55hyy7ixrsi2"
        Dim mobile_number as string  ="14155552671"
        dim ultramsgApiUrl as string  ="https://api.ultramsg.com/"+instance_id+"/messages/chat"
        WebRequest = HttpWebRequest.Create(ultramsgApiUrl)
        Dim postdata As String = "token=" + token + "&to="+ mobile_number + "&body=WhatsApp API on UltraMsg.com works good"
        Dim enc As UTF8Encoding = New System.Text.UTF8Encoding()
        Dim postdatabytes As Byte()  = enc.GetBytes(postdata)
        WebRequest.Method = "POST"
        WebRequest.ContentType = "application/x-www-form-urlencoded"
        WebRequest.GetRequestStream().Write(postdatabytes)
        Dim ret As New System.IO.StreamReader(WebRequest.GetResponse().GetResponseStream())
        console.writeline(ret.ReadToEnd())
    End Sub  
  
End Module  

Enviar imagen usando vbnet

Imports System 
Imports System.Net
Imports System.Text
Imports System.IO
Imports System.Web

Module base64  
    Sub Main()  
        Dim WebRequest As HttpWebRequest
        Dim instance_id as string ="instance1150"
        Dim token as string  ="1g55hyy7ixrsi2"
        Dim mobile_number as string  ="14155552671"
        dim ultramsgApiUrl as string  ="https://api.ultramsg.com/"+instance_id+"/messages/image"
        WebRequest = HttpWebRequest.Create(ultramsgApiUrl)
        Dim postdata As String = "token=" + token + "&to="+ mobile_number + "&image=https://file-example.s3-accelerate.amazonaws.com/images/test.jpeg&caption=image Caption"
        Dim enc As UTF8Encoding = New System.Text.UTF8Encoding()
        Dim postdatabytes As Byte()  = enc.GetBytes(postdata)
        WebRequest.Method = "POST"
        WebRequest.ContentType = "application/x-www-form-urlencoded"
        WebRequest.GetRequestStream().Write(postdatabytes)
        Dim ret As New System.IO.StreamReader(WebRequest.GetResponse().GetResponseStream())
        console.writeline(ret.ReadToEnd())
    End Sub  
  
End Module  

Enviar documento usando vbnet

Imports System 
Imports System.Net
Imports System.Text
Imports System.IO
Imports System.Web

Module base64  
    Sub Main()  
        Dim WebRequest As HttpWebRequest
        Dim instance_id as string ="instance1150"
        Dim token as string  ="1g55hyy7ixrsi2"
        Dim mobile_number as string  ="14155552671"
        dim ultramsgApiUrl as string  ="https://api.ultramsg.com/"+instance_id+"/messages/document"
        WebRequest = HttpWebRequest.Create(ultramsgApiUrl)
        Dim postdata As String = "token=" + token + "&to="+ mobile_number + "&filename=hello.pdf&document=https://file-example.s3-accelerate.amazonaws.com/documents/cv.pdf"
        Dim enc As UTF8Encoding = New System.Text.UTF8Encoding()
        Dim postdatabytes As Byte()  = enc.GetBytes(postdata)
        WebRequest.Method = "POST"
        WebRequest.ContentType = "application/x-www-form-urlencoded"
        WebRequest.GetRequestStream().Write(postdatabytes)
        Dim ret As New System.IO.StreamReader(WebRequest.GetResponse().GetResponseStream())
        console.writeline(ret.ReadToEnd())
    End Sub  
  
End Module  

Enviar audio usando vbnet

Imports System 
Imports System.Net
Imports System.Text
Imports System.IO
Imports System.Web

Module base64  
    Sub Main()  
        Dim WebRequest As HttpWebRequest
        Dim instance_id as string ="instance1150"
        Dim token as string  ="1g55hyy7ixrsi2"
        Dim mobile_number as string  ="14155552671"
        dim ultramsgApiUrl as string  ="https://api.ultramsg.com/"+instance_id+"/messages/audio"
        WebRequest = HttpWebRequest.Create(ultramsgApiUrl)
        Dim postdata As String = "token=" + token + "&to="+ mobile_number + "&audio=https://file-example.s3-accelerate.amazonaws.com/audio/2.mp3"
        Dim enc As UTF8Encoding = New System.Text.UTF8Encoding()
        Dim postdatabytes As Byte()  = enc.GetBytes(postdata)
        WebRequest.Method = "POST"
        WebRequest.ContentType = "application/x-www-form-urlencoded"
        WebRequest.GetRequestStream().Write(postdatabytes)
        Dim ret As New System.IO.StreamReader(WebRequest.GetResponse().GetResponseStream())
        console.writeline(ret.ReadToEnd())
    End Sub  
  
End Module  

Enviar voz usando vbnet

Imports System 
Imports System.Net
Imports System.Text
Imports System.IO
Imports System.Web

Module base64  
    Sub Main()  
        Dim WebRequest As HttpWebRequest
        Dim instance_id as string ="instance1150"
        Dim token as string  ="1g55hyy7ixrsi2"
        Dim mobile_number as string  ="14155552671"
        dim ultramsgApiUrl as string  ="https://api.ultramsg.com/"+instance_id+"/messages/voice"
        WebRequest = HttpWebRequest.Create(ultramsgApiUrl)
        Dim postdata As String = "token=" + token + "&to="+ mobile_number + "&audio=https://file-example.s3-accelerate.amazonaws.com/voice/oog_example.ogg"
        Dim enc As UTF8Encoding = New System.Text.UTF8Encoding()
        Dim postdatabytes As Byte()  = enc.GetBytes(postdata)
        WebRequest.Method = "POST"
        WebRequest.ContentType = "application/x-www-form-urlencoded"
        WebRequest.GetRequestStream().Write(postdatabytes)
        Dim ret As New System.IO.StreamReader(WebRequest.GetResponse().GetResponseStream())
        console.writeline(ret.ReadToEnd())
    End Sub  
  
End Module  

Enviar video usando vbnet

Imports System 
Imports System.Net
Imports System.Text
Imports System.IO
Imports System.Web

Module base64  
    Sub Main()  
        Dim WebRequest As HttpWebRequest
        Dim instance_id as string ="instance1150"
        Dim token as string  ="1g55hyy7ixrsi2"
        Dim mobile_number as string  ="14155552671"
        dim ultramsgApiUrl as string  ="https://api.ultramsg.com/"+instance_id+"/messages/video"
        WebRequest = HttpWebRequest.Create(ultramsgApiUrl)
        Dim postdata As String = "token=" + token + "&to="+ mobile_number + "&video=https://file-example.s3-accelerate.amazonaws.com/video/test.mp4"
        Dim enc As UTF8Encoding = New System.Text.UTF8Encoding()
        Dim postdatabytes As Byte()  = enc.GetBytes(postdata)
        WebRequest.Method = "POST"
        WebRequest.ContentType = "application/x-www-form-urlencoded"
        WebRequest.GetRequestStream().Write(postdatabytes)
        Dim ret As New System.IO.StreamReader(WebRequest.GetResponse().GetResponseStream())
        console.writeline(ret.ReadToEnd())
    End Sub  
  
End Module  

Enviar enlace usando vbnet

Imports System 
Imports System.Net
Imports System.Text
Imports System.IO
Imports System.Web

Module base64  
    Sub Main()  
        Dim WebRequest As HttpWebRequest
        Dim instance_id as string ="instance1150"
        Dim token as string  ="1g55hyy7ixrsi2"
        Dim mobile_number as string  ="14155552671"
        dim ultramsgApiUrl as string  ="https://api.ultramsg.com/"+instance_id+"/messages/link"
        WebRequest = HttpWebRequest.Create(ultramsgApiUrl)
        Dim postdata As String = "token=" + token + "&to="+ mobile_number + "&link=https://en.wikipedia.org/wiki/COVID-19"
        Dim enc As UTF8Encoding = New System.Text.UTF8Encoding()
        Dim postdatabytes As Byte()  = enc.GetBytes(postdata)
        WebRequest.Method = "POST"
        WebRequest.ContentType = "application/x-www-form-urlencoded"
        WebRequest.GetRequestStream().Write(postdatabytes)
        Dim ret As New System.IO.StreamReader(WebRequest.GetResponse().GetResponseStream())
        console.writeline(ret.ReadToEnd())
    End Sub  
  
End Module  

Enviar contacto usando vbnet

Imports System 
Imports System.Net
Imports System.Text
Imports System.IO
Imports System.Web

Module base64  
    Sub Main()  
        Dim WebRequest As HttpWebRequest
        Dim instance_id as string ="instance1150"
        Dim token as string  ="1g55hyy7ixrsi2"
        Dim mobile_number as string  ="14155552671"
        dim ultramsgApiUrl as string  ="https://api.ultramsg.com/"+instance_id+"/messages/contact"
        WebRequest = HttpWebRequest.Create(ultramsgApiUrl)
        Dim postdata As String = "token=" + token + "&to="+ mobile_number + "&[email protected]"
        Dim enc As UTF8Encoding = New System.Text.UTF8Encoding()
        Dim postdatabytes As Byte()  = enc.GetBytes(postdata)
        WebRequest.Method = "POST"
        WebRequest.ContentType = "application/x-www-form-urlencoded"
        WebRequest.GetRequestStream().Write(postdatabytes)
        Dim ret As New System.IO.StreamReader(WebRequest.GetResponse().GetResponseStream())
        console.writeline(ret.ReadToEnd())
    End Sub  
  
End Module  

Enviar ubicación usando vbnet

Imports System 
Imports System.Net
Imports System.Text
Imports System.IO
Imports System.Web

Module base64  
    Sub Main()  
        Dim WebRequest As HttpWebRequest
        Dim instance_id as string ="instance1150"
        Dim token as string  ="1g55hyy7ixrsi2"
        Dim mobile_number as string  ="14155552671"
        dim ultramsgApiUrl as string  ="https://api.ultramsg.com/"+instance_id+"/messages/location"
        WebRequest = HttpWebRequest.Create(ultramsgApiUrl)
        Dim postdata As String = "token=" + token + "&to="+ mobile_number + "&address=ABC company \n Sixth floor , office 38&lat=25.197197&lng=55.2721877"
        Dim enc As UTF8Encoding = New System.Text.UTF8Encoding()
        Dim postdatabytes As Byte()  = enc.GetBytes(postdata)
        WebRequest.Method = "POST"
        WebRequest.ContentType = "application/x-www-form-urlencoded"
        WebRequest.GetRequestStream().Write(postdatabytes)
        Dim ret As New System.IO.StreamReader(WebRequest.GetResponse().GetResponseStream())
        console.writeline(ret.ReadToEnd())
    End Sub  
  
End Module  

Enviar Vcard usando vbnet

Imports System 
Imports System.Net
Imports System.Text
Imports System.IO
Imports System.Web

Module base64  
    Sub Main()  
        Dim WebRequest As HttpWebRequest
        Dim instance_id as string ="instance1150"
        Dim token as string  ="1g55hyy7ixrsi2"
        Dim mobile_number as string  ="14155552671"
        dim ultramsgApiUrl as string  ="https://api.ultramsg.com/"+instance_id+"/messages/vcard"
        WebRequest = HttpWebRequest.Create(ultramsgApiUrl)
        Dim postdata As String = "token=" + token + "&to="+ mobile_number + "&vcard= BEGIN:VCARD\nVERSION:3.0\nN:lastname;firstname\nFN:firstname lastname\nTEL;TYPE=CELL;waid=14000000001:14000000002\nNICKNAME:nickname\nBDAY:01.01.1987\nX-GENDER:M\nNOTE:note\nADR;TYPE=home:;;;;;;\nADR;TYPE=work_:;;;;;;\nEND:VCARD"
        Dim enc As UTF8Encoding = New System.Text.UTF8Encoding()
        Dim postdatabytes As Byte()  = enc.GetBytes(postdata)
        WebRequest.Method = "POST"
        WebRequest.ContentType = "application/x-www-form-urlencoded"
        WebRequest.GetRequestStream().Write(postdatabytes)
        Dim ret As New System.IO.StreamReader(WebRequest.GetResponse().GetResponseStream())
        console.writeline(ret.ReadToEnd())
    End Sub  
  
End Module  

finalmente, puede ver la documentación completa de la API de Whatsapp y las preguntas frecuentes .