private void LoginWindow_btn_OK_Click(object sender, RoutedEventArgs e)
 {
     //DAL dal = new DAL();
     if (bll.IsSuchUserNameInDB(Login_field.Text))
     {
         //  var data = Encoding.ASCII.GetBytes(Password_field.Password);
         if (bll.IsValidPassword(Login_field.Text, Password_field.Password))
         {
             //login = bll.GetLoginWithName(Login_field.Text);
             IsSuccsesfullLogin = true;
             LoginName          = Login_field.Text;
             LoginStatusName    = bll.GetLoginStatusOfUser(LoginName);
             if (LoginStatusName == "user")
             {
                 string[] userAddress = bll.GetCityStreetAndNumberOfUser(LoginName);
                 City   = userAddress[0];
                 Street = userAddress[1];
                 Number = userAddress[2];
             }
             this.Close();
         }
         else
         {
             MessageBox.Show("Wrong login or password");
             IsSuccsesfullLogin = false;
         }
     }
     else
     {
         MessageBox.Show("Wrong login or password");
         IsSuccsesfullLogin = false;
     }
 }