.NET remobjects documentation on LoginNeededEventArs

Remoting SDK
1

Is there documentation on the LoginNeededEventArgs class?

The online documentation yields little: Remoting SDK for .NET

My OnLoginNeeded function performs a task which does not require a GUI. It uses some kind of client access token.
However I notice that this function gets called repeatedly when the login fails
Possibly the Retry parameter needs to be set to false.

Regards,
Frederic

2

Hi,

Check ClientChannel.OnLoginNeeded article.

We use such code in samples:

private void ClientChannel_OnLoginNeeded(object sender, LoginNeededEventArgs e)
{
    // Performing login
    if (this.LogOn(Properties.Settings.Default.UserId, Properties.Settings.Default.Password))
    {
        e.Retry = true;
        e.LoginSuccessful = true;
        return;
    }

    String lUserId;
    String lPassword;

    LogOnForm lLoginForm = new LogOnForm();

    if (lLoginForm.ShowDialog() != true)
    {
        MessageBox.Show("Login cancelled");
        return;
    }
    lUserId = lLoginForm.UserId;
    lPassword = lLoginForm.GetPassword();

    if (this.LogOn(lUserId, lPassword))
    {
        e.Retry = true;
        e.LoginSuccessful = true;
    }
    else
        MessageBox.Show("Login failed");
}
3

Hello Evgeny,

My code is very similar. For failed logins I do not change the Retry or LoginSuccesful attribute.

private void ClientChannel_OnLoginNeeded(object sender, RemObjects.SDK.LoginNeededEventArgs e)
{
  if (roCon_ == null)
    return;
  // Performing login
  bool bLoginOK = this.performLogin(true);
  if (bLoginOK)
  {
    e.Retry = true;
    e.LoginSuccessful = true;
    return;
  }
}

However I see many Login calls per second from the same client. I am wondering where it comes from.

Maybe my client code misbehaves but it is hard to identify this.
It would be very useful for me if I could know which RO function call triggered the Login call.

4

p.s. I don’t see information on the LoginNeededEventArgs class properties in the link you referred to
Did you mean the paragraph OnLoginNeeded? I can’t find the explanation on the “Retry” and “LoginSuccesful” (the latter obvious enough IMO).

5

Hi,

Check

protected void TriggerOnLoginNeeded(Exception exception, out Boolean loginSuccessful)
{
        if (this.OnLoginNeeded == null)
        {
                loginSuccessful = false;
                return;
        }

        LoginNeededEventArgs lEventArgs = new LoginNeededEventArgs(exception);
        this.OnLoginNeeded(this, lEventArgs);

        loginSuccessful = lEventArgs.LoginSuccessful;
}

catch (SessionNotFoundException e)
{
        Boolean loginAttemptResult;
        this.TriggerOnLoginNeeded(e, out loginAttemptResult);
        if (loginAttemptResult)
        {
                requestStream.Seek(0, SeekOrigin.Begin);
                retry = true;
        }
        else
        {
                throw;
        }
}