C# WebBrowser -> WebView2 solution

Good to hear Trish.

I think there is still a problem registering new apps and have sent a query to the the API team. In summary, the auth process works, you get a code and with that can successfully retrieve OAuth access and refresh tokens but you end up with a 'Forbidden' response when trying to use the access token enumerate companies (either manually or via the SDK.)

However, if you have an older app key/secret (like from about 2 weeks ago) everything seems to work fine.

Hi Steve,

You are an absolutely amazing person, we owe you an enormous amount of respect and gratitude, we now have our app working again.

Thank you 

Trish

Hi Trish, sure.

        // Helper function to extract the authorization code from the URL
        private static string ExtractAuthorizationCode(string uri)
        {
            var uriObj = new Uri(uri);
            var queryParams = HttpUtility.ParseQueryString(uriObj.Query);
            return queryParams["code"];
        }

Here's the whole class:

    public static class OAuthLogin
    {
        private const string CsOAuthServer = "https://secure.myob.com/oauth2/account/authorize/";
        private const string CsOAuthScope = "CompanyFile";
        private static string _currentUri = string.Empty;

        public static async Task<string> GetAuthorizationCode(IApiConfiguration config)
        {
            // Format the URL for the OAuth server login
            string url = string.Format("{0}?client_id={1}&redirect_uri={2}&scope={3}&response_type=code",
                                       CsOAuthServer, config.ClientId, HttpUtility.UrlEncode(config.RedirectUrl), CsOAuthScope);

            // Create a new form with WebView2
            var frm = new Form();
            var webView2 = new WebView2
            {
                Dock = DockStyle.Fill
            };
            frm.Controls.Add(webView2);

            // Set up a TaskCompletionSource to signal when the form can close
            var tcs = new TaskCompletionSource<string>();

            // Subscribe to NavigationCompleted to capture the OAuth redirect
            webView2.CoreWebView2InitializationCompleted += (sender, args) =>
            {
                if (args.IsSuccess)
                {
                    // Navigate to the OAuth login URL
                    webView2.CoreWebView2.Navigate(url);
                }
            };

            // Capture the URL in NavigationStarting
            webView2.NavigationStarting += (sender, args) =>
            {
                // Store the URI when navigation starts
                _currentUri = args.Uri;
            };

            // Use NavigationCompleted to check if the URI contains the authorization code
            webView2.NavigationCompleted += (sender, args) =>
            {
                if (_currentUri.Contains("code="))
                {
                    // Extract the authorization code from the URL
                    string code = ExtractAuthorizationCode(_currentUri);

                    // Signal the TaskCompletionSource that the form can close with the code
                    tcs.SetResult(code);

                    // Close the form
                    frm.Invoke((MethodInvoker)(() => frm.Close()));
                }
            };

            // Initialize WebView2 control asynchronously
            await webView2.EnsureCoreWebView2Async(null);

            frm.Size = new Size(800, 600);
            frm.Show();

            // Wait until the TaskCompletionSource is signaled (form is closed)
            string authCode = await tcs.Task;

            return authCode;

        }

        // Helper function to extract the authorization code from the URL
        private static string ExtractAuthorizationCode(string uri)
        {
            var uriObj = new Uri(uri);
            var queryParams = HttpUtility.ParseQueryString(uriObj.Query);
            return queryParams["code"];
        }

    }

Hi Steve_PP ,

Can I bother you for the 

ExtractAuthorizationCode proceedure, it would help enormously.

Thanks

Trish

Hi Steve_PP 

Thank you for sharing this :-)

Will let you know how we go

Trish