private void ComboBoxMethod_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
 {
     if (!ComboBoxMethod.SelectedValue.ToString().Equals("系统管理"))
     {
         if (ComboBoxMethod.SelectedValue.ToString().Equals("样品管理"))
         {
             ManagementSample managementSample = new ManagementSample()
             {
                 ShowInTaskbar = false,
                 Owner         = this
             };
             managementSample.Show();
             ComboBoxMethod.SelectedIndex = 0;
         }
         else if (ComboBoxMethod.SelectedValue.ToString().Equals("被检单位管理"))
         {
             ManagementCompany managementCompany = new ManagementCompany()
             {
                 ShowInTaskbar = false,
                 Owner         = this
             };
             managementCompany.Show();
             ComboBoxMethod.SelectedIndex = 0;
         }
     }
 }
        /// <summary>
        /// 样品管理
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void BtnSampleManagement_Click(object sender, RoutedEventArgs e)
        {
            ManagementSample addSample = new ManagementSample()
            {
                ShowInTaskbar = false,
                Owner         = this
            };

            addSample.Show();
        }