eCompanies/eCompanies/MainWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace eCompanies
{
    /// <summary>
    /// Логика взаимодействия для MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        UsersWindow usersWindowInstance = null;
        public MainWindow()
        {
            InitializeComponent();
            updateCompanyGrid();
        }
        
        private void updateCompanyGrid()
        {
            companyGrid.DataContext = App.getCompanies();
        }

        private void companyGrid_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            try
            {
                Company company = (Company)companyGrid.CurrentItem;
                if (usersWindowInstance != null) usersWindowInstance.Close();
                usersWindowInstance = new UsersWindow(company);
                usersWindowInstance.Show();
            }
            catch { }
        }
       
    }
}