C# WebBrowser -> WebView2 solution

Just to complete this thread, the issue with new app keys is that you can only create 2 without getting MYOB involved to manually activate them.

Hi Steve_PP 

It is all working ok as we don't have a new app and are using the SDK.

We are just investigating what other WebView files we need to include for the client installation and then we should be good to go with updating our clients which will be an enormous relief.

You have been extremely generous, and I cannot thank you enough.

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"];
        }

    }