Pass a value from login form to main form

Question

I have a login screen and I need to pass username to my main form (for getting permissions etc.). Here is my code:

//Login
private void button1_Click(object send         


        

Answer 1

1. This is the best way to transfer data from one form to another, On the LoginForm.cs write like this:

   ex.UserName = txtUserName.text;    
   Password=txtPassword.text;    
   MainForm mainForm = new MainForm(UserName,Password);    
   this.Hide(); 
   
   mainForm.Show();
   

2. In the MainForm.cs edit the

   public MainForm () { }

like this:

public MainForm(string userName,string password){
}

Answer 2

In login form

public string UserName {get; private set;}

if (string.Compare(dbPassword, appPassword) == 0)
                {
                    UserName = txtUser.Text;
                    //I need to pass username value to myForm...
                    DialogResult = DialogResult.OK;
                }
                else
                {
                    //Show warning
                }

in main

    DialogResult result;
    using (var loginForm = new Login())
        result = loginForm.ShowDialog();
    if (result == DialogResult.OK)
    {
        var username = loginForm.UserName;
        Application.Run(new myForm(username));
    }

Answer 3

Expose username as a string property of your login form class. This way you'll be able to fetch it after the form will be closed (it will still remain in memory).

Answer 4

it is simply use EF on your codes just like below

  }
    Siman_dbEntities db = new Siman_dbEntities();
    public string UserNameLogedIn;
    private void btnLogin_Click(object sender, EventArgs e)
    {
    var login = from b in db.Tbl_Users.Where(b => b.Username == txtUsername.Text && b.Password == txt_Password.Text)
                    select b;
        if (login.Count()==1)
        {
            this.Hide();
            main frmmain = new main();
            frmmain.Show();
        }
        var query = db.Tbl_Users.Where(c => c.Username == txtUsername.Text).Single();
        UserNameLogedIn = query.Name.ToString();

    }