VB.NET

Dynamics CRM Oauth2 Client Credentials

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Get an OAuth2 access token for Dynamics CRM using client credentials. VB.NET

Dim success As Boolean = False

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

Dim http As New Chilkat.Http

' Pass the client ID/secret using Basic HTTP authentication.
http.Login = "CLIENT_ID"
http.Password = "CLIENT_SECRET"
http.BasicAuth = True

Dim req As New Chilkat.HttpRequest
req.AddParam("client_secret","CLIENT_SECRET")
req.AddParam("client_id","CLIENT_ID")
req.AddParam("scope","https://yourdynamicsdomain.crm3.dynamics.com/.default")
req.AddParam("grant_type","client_credentials")

' Use your own tenant ID, for example 4d8fdd66-66d1-43b0-ae5c-e31b4b7de5cd
Dim url As String = "https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token"
req.HttpVerb = "POST"
req.ContentType = "application/x-www-form-urlencoded"

Dim resp As New Chilkat.HttpResponse
success = http.HttpReq(url,req,resp)
If (success = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim statusCode As Integer = resp.StatusCode
Debug.WriteLine("Response status code = " & statusCode)

Dim json As New Chilkat.JsonObject
json.Load(resp.BodyStr)

json.EmitCompact = False
Debug.WriteLine(json.Emit())

If (statusCode = 200) Then
    json.WriteFile("qa_data/tokens/dynamicsCrmClientCredentialsToken.json")
    Debug.WriteLine("Success.")
Else
    Debug.WriteLine("Failed.")
End If