Visual Application Launcher

namespace VAL
{
    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;
    using System.ServiceModel;
    using VAL.Controls;
    using VAL.Common;
    using VAL.Contracts;
    using VAL.Contracts.ServiceFaults;
    using VAL.Model;
    using System.ServiceModel.Security;

    public partial class UserMaintenance : PersistedForm
    {
        private User userInstance;
        private ListViewItem selectedItem;

        #region Construct and Load

        /// <summary>
        /// Default ctor
        /// </summary>
        public UserMaintenance(IAdministratorService service)
        {
            InitializeComponent();
            this.Service = service;

            LoadUsers();
        }

        private void UserMaintenance_Load(object sender, EventArgs e)
        {
            this.SetFormEditMode(false);
        }

        #endregion

        private IAdministratorService Service { get; set; }

        private void SetFormEditMode(bool editing)
        {
            this.detailsBox.Enabled = editing;
            this.applyButton.Enabled = editing;
            this.usersList.Enabled = !editing;

            this.userSearchButton.Enabled = (!string.IsNullOrEmpty(Session.Configuration.ActiveDirectoryDomain));

            if (!editing)
            {
                base.ClearEditFields(this);
            }            
        }

        private void BindObjectFields()
        {
            BindingHelper.BindField(this.windowsIdentityText, BindingProperties.Text, userInstance, "WindowsIdentityName");
            BindingHelper.BindField(this.forenameText, BindingProperties.Text, userInstance, "Forename");
            BindingHelper.BindField(this.surnameText, BindingProperties.Text, userInstance, "Surname");
            BindingHelper.BindField(this.activeCheckBox, BindingProperties.Checked, userInstance, "IsActive");
        }

        private void LoadUsers()
        {
            var users = Service.GetUsers();
            try
            {
                this.usersList.BeginUpdate();
                this.usersList.Items.Clear();

                ListViewItem[] viewItems = new ListViewItem[users.Length];

                for (int i = 0; i < viewItems.Length; ++i)
                {
                    var user = users[i];

                    string[] items = new string[]{ user.FullName, user.WindowsIdentityName};
                    viewItems[i] = new ListViewItem(items);

                    viewItems[i].Tag = user;
                    viewItems[i].ImageIndex = (user.IsActive ? 0 : 1);       
                }

                this.usersList.Items.AddRange(viewItems);
            }
            finally
            {
                this.usersList.EndUpdate();
            }
           
        }

        private void userSearchButton_Click(object sender, EventArgs e)
        {
            using (var picker = new UserPicker(Session.Configuration.ActiveDirectoryDomain))
            {
                if (picker.ShowDialog(this) == DialogResult.OK)
                {
                    ActiveDirectoryUser user = picker.SelectedUser;

                    userInstance.WindowsIdentityName = user.DomainAccount;
                    userInstance.Forename = user.Forename;
                    userInstance.Surname = user.Surname;

                    BindObjectFields();
                }
            }
        }

        private void applyButton_Click(object sender, EventArgs e)
        {
            if (!this.userInstance.IsValid)
            {
                Messaging.ShowError(userInstance.ErrorMessage);
                return;
            }

            bool isnew = (userInstance.Id == 0);

            try
            {
                userInstance = Service.SaveUser(userInstance);    
            }
            catch (FaultException<UserFault> ex)
            {
                Messaging.ShowError(ex.Message);
                return;
            }

            ListViewItem lvi;
            if (isnew)
                lvi = new ListViewItem();
            else
                lvi = selectedItem;

            lvi.Text = userInstance.FullName;
            lvi.SubItems.Add(userInstance.WindowsIdentityName);
            lvi.Tag = userInstance;
            lvi.ImageIndex = (userInstance.IsActive ? 0 : 1);

            if (selectedItem == null)
            {
                this.usersList.Items.Add(lvi);
            }

            SetFormEditMode(false);            
        }


        private void EditUser()
        {
            if (this.usersList.SelectedItems.Count == 0) return;
            selectedItem = usersList.SelectedItems[0];

            this.userInstance = (User)selectedItem.Tag;

            // Set up object binding and switch to edit mode
            BindObjectFields();
            SetFormEditMode(true);
        }

        private void usersList_DoubleClick(object sender, EventArgs e)
        {
            EditUser();
        }

        private void cancelButton_Click(object sender, EventArgs e)
        {
            if (!this.usersList.Enabled)
            {
                SetFormEditMode(false);
            }
            else
            {
                this.Close();
            }
        }

        private void addToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.userInstance = new User();
            userInstance.IsActive = true;

            BindObjectFields();
            SetFormEditMode(true);
        }

        private void editToolStripMenuItem_Click(object sender, EventArgs e)
        {
            EditUser();
        }

        private void deleteToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (!TryGetListViewItem(this.usersList, out selectedItem))
                return;

            var user = (User)selectedItem.Tag;

            if (Messaging.AskQuestion(string.Format("Delete user {0} from the database? They will also be removed from all group defintions", user.FullName)) == System.Windows.Forms.DialogResult.Yes)
            {
                Service.DeleteUser(user.Id);
                this.usersList.Items.Remove(selectedItem);
                this.selectedItem = null;
            }     
        }
    }
}