How to data fetch login form to order form nane email contact number

After successful login, get the user's name, email and contact number from the database and pass them to the Order form using its constructor.

OrderForm frm = new OrderForm(name, email, contactNumber);
frm.Show();

In the Order form:

public OrderForm(string name, string email, string contactNumber)

{

    InitializeComponent();

    txtName.Text = name;

    txtEmail.Text = email;

    txtContact.Text = contactNumber;

}

This is a simple and clean way to pass the logged-in user's information from the Login form to the Order form.

Use delegate and events