Error when refreshing dataset via REST API in VB.net

Anonymous — Mon, 28 Sep 2020 08:37:24 GMT

Hello,

I'm using the following code to trigger a dataset refresh via the REST API and VB.net:

Dim redirectUri, resourceUri, authorityUri, clientID As String redirectUri = "https://dev.powerbi.com/Apps/SignInRedirect" resourceUri = "https://analysis.windows.net/powerbi/api" authorityUri = "https://login.windows.net/common/" Dim authContext As New AuthenticationContext(authorityUri, New TokenCache()) clientID = My-Client-ID Dim authenticationResult As AuthenticationResult Try authenticationResult = Await authContext.AcquireTokenAsync(resourceUri, clientID, New Uri(redirectUri), New PlatformParameters(PromptBehavior.Auto)) Dim s As HttpWebRequest Dim enc As UTF8Encoding Dim postdata As String s = HttpWebRequest.Create("https://api.powerbi.com/v1.0/myorg/groups/My-Workspace/datasets/My-Dataset/refreshes") s.Method = "POST" s.KeepAlive = True s.ContentLength = 0 s.Headers.Add("Authorization", String.Format("Bearer {0}", authenticationResult.AccessToken)) s.ContentType = "application/x-www-form-urlencoded" s.GetResponse() Catch ex As Exception MessageBox.Show(ex.Message) End Try

This used to work perfectly. However suddenly I started to get an error at .GetResponse ("Connection closed..."). Does anyone have an idea where the problem could be? I updated all the involved nuget packages but that didn't help.

Thanks for any help!

Re: Error when refreshing dataset via REST API in VB.net

Anonymous — Mon, 28 Sep 2020 10:18:19 GMT

In case anyone is having the same issue, I had to enable TLS 1.2 for the connection, which I did by adding this line in code:

System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12

Reference here and here.

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Error when refreshing dataset via REST API in VB.net

Re: Error when refreshing dataset via REST API in VB.net