Event Handling in different form

[AsianHaxer01]

I have a main windows form that runs everything and i have event handling that occurs when a user is logged in correctly it enables all other buttons. However, is their a way to enable other buttons from other active forms when the event handling catches true that the user logged in instead of just in the main form? i tried the same way i did the others however, the button doesnt seem to become enabled. Any help would be great.

[rliq]

I think you need to post a sample of your code. Saying that "you tried it the same way as you did in the other form", is meaningless, when we don't know what you did in the other form.

[AsianHaxer01]

So in my login class i have an event handler
public void enableButtons()
{
if (MakeUIEnabled != null)
MakeUIEnabled(true);
}
and when the login is successful it goes over to the main function which checks to see if the event was successful or not, if it is it goes into

public void EnableUIControls(bool shdEnable)
{
PatientInfoButton.Enabled = shdEnable;
ViewGraph.Enabled = shdEnable;
Logout.Enabled = shdEnable;
ViewGraph.Enabled = shdEnable;
searchPatient.Enabled = shdEnable;
usernameTextBox.Text = person.getName();
LoginButton.Enabled = false;
patientBox.Visible = true;
patientLabel.Visible = true;
}

[AsianHaxer01]

What i am trying to do is to access another windows form button when my login is successful and enable it the same way shown above. However, when i tried to enable the other forms button from main, the button never was enabled. I am wondering if i will have to enable the button within the form it belongs to or if i can enable it from a different form

[Nikel]

I'm not sure I get how your forms work. Does the main form open the login form? Is there a login form at all? How does the login work?

Assuming you have one main form and another "login" form, you could do this using the DialogResult, or generate an event that will be subscribed by the main form to capture a correct/incorrect login.

Using DialogResult

// On the main form:

DialogResult rslt = loginForm.ShowDialog();
if (rslt == <ok>) // VS will complete this, I don't remember what the enum was called
 // login ok, validate buttons
else
 // login error, retry or something.

// On your Login form
if (validationOk)
 this.DialogResult = <enumName>.OK;
else
 this.DialogResult = <enumName>.(whatever you want) // Don't use Abort, it will close your form abruptly

Using events

// On your main Form
LoginFormClass loginForm = new LoginFormClass();

loginForm.UserValidated += <eventHandler> // Again, VS should complete this
// On the eventHandler you will create, do whatever you need

// On your Login Form
public delegate void LoginFormEventHandler(LoginForm sender, EventArgs e)
public event LoginFormEventHandler UserValidated;

// and when you need to trigger the event
if (UserValidated != null) UserValidated(this, yourEventArgs);

The plain EventArgs class will not be of much use here, so you can create your own derived class to include whatever parameters you need

public class UserValidationEventArgs : EventArgs
{
 public string bla;
 public int bla;
 public bool bla;
}

Use 'UserValidationEventArgs' instead of EventArgs when declaring your event, and you can pass data between your forms when stuff happens.

Not sure I'm understanding what you need though... but I hope this helps.

[AsianHaxer01]

Thank You. Did help a lot.