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Sign users in to a .NET desktop app

This guide explains how to run the Casdoor example for .NET desktop apps and how to add the same sign-in flow to your own app. The example shows the Casdoor sign-in page in a WebView2 window.

Learning outcomes​

  • Configure and run the example app.
  • Open the Casdoor sign-in window from your app.
  • Exchange the authorization code for a token and read the user.

What you need​

Sample code​

Run the example​

  1. Clone casdoor-dotnet-desktop-example.

  2. Set the following values. All of them are strings.

    NomeDescriçãoArquivo
    DomainO host/domínio do seu servidor CasdoorCasdoorVariables.cs
    ClientIdO ID do Cliente da sua aplicação CasdoorCasdoorVariables.cs
    AppNameO nome da sua aplicação CasdoorCasdoorVariables.cs
    CallbackUrlO caminho da URL de callback para a sua aplicação Casdoor. Se não fornecido, será casdoor://callbackCasdoorVariables.cs
    ClientSecretO Segredo do Cliente da sua aplicação CasdoorCasdoorVariables.cs

  3. Start the app.

    • In Visual Studio: Open casdoor-dotnet-desktop-example.sln and press Ctrl + F5.
    • On the command line: Run dotnet run in src/DesktopApp.

  4. In the app window, click Casdoor Login.

    Main window of the example app

    The Casdoor sign-in page opens in a window.

    Casdoor sign-in window

  5. Sign in. The app shows the profile of the user.

    User profile in the example app

Recording of the complete sign-in flow

Add sign-in to your app​

Open the sign-in window​

Create the sign-in window and subscribe to the event that delivers the authorization code:

var login = new Login();
// Triggered when login succeeds, you will receive an auth code in the event handler
login.CodeReceived += Login_CodeReceived;
login.ShowDialog();

Exchange the code for the user​

In the event handler, exchange the authorization code for a token and read the user from it:

public async Task<string?> RequestToken(string clientId, string clientSecret, string code)
{
    var body = new
    {
        grant_type = "authorization_code",
        client_id = clientId,
        client_secret = clientSecret,
        code
    };

    var req = new RestRequest(_requestTokenUrl).AddJsonBody(body);
    var token = await _client.PostAsync<TokenDto>(req);

    return token?.AccessToken;
}

public async Task<UserDto?> GetUserInfo(string token)
{
    var req = new RestRequest(_getUserInfoUrl).AddQueryParameter("accessToken", token);

    return await _client.GetAsync<UserDto>(req);
}

...

var token = await _casdoorApi.RequestToken(
    CasdoorVariables.ClientId,
    CasdoorVariables.ClientSecret,
    authCode,
);

var user = await _casdoorApi.GetUserInfo(token);

See also​