/// <summary>
/// Adds a new list. It is important to note that because there is no enforcement of
/// data consistency in the context, the app must understand the data and enforce it.
/// </summary>
/// <param name="modelList">The model list to add</param>
public void AddList(ModelList modelList)
{
// Extract the service entity from the model entity
DefaultScope.List newList = modelList.List;
// Simple argument checking
if (null == newList)
{
throw new ArgumentNullException("newList");
}
if (newList.ID == null)
{
throw new ArgumentNullException("List id is null");
}
// Do a LINQ query to verify that the list can be added. Current constraints
// are unique id and unique name.
DefaultScope.List existingList = (from s in context.ListCollection
where s.ID == newList.ID || s.Name == newList.Name
select s).FirstOrDefault();
if (existingList != default(List))
{
throw new ArgumentException("List with the same id already exists");
}
// Add the list to the context.
context.AddList(newList);
}
/// <summary>
/// Construct which takes the underlying list and its associated context.
/// </summary>
/// <param name="list"></param>
/// <param name="context"></param>
public ModelList(DefaultScope.List list, ListSampleOfflineContext context)
{
this.list = list;
this.context = context;
items = null;
// Register for the property changed event
list.PropertyChanged += new PropertyChangedEventHandler(list_PropertyChanged);
}
/// <summary>
/// Construct which takes the underlying list and its associated context.
/// </summary>
/// <param name="list"></param>
/// <param name="context"></param>
public ModelList(DefaultScope.List list, ListSampleOfflineContext context)
{
this.list = list;
this.context = context;
items = null;
// Register for the property changed event
list.PropertyChanged += new PropertyChangedEventHandler(list_PropertyChanged);
}
/// <summary>
/// Navigates to the item's list
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ItemListButtonClick(object sender, RoutedEventArgs e)
{
Control control = (Control)sender;
DefaultScope.List list = (DefaultScope.List)control.Tag;
ListsListBox.SelectedItem = list;
MainPageTabControl.SelectedIndex = 0;
}
private void AddNewListBtn_Click(object sender, EventArgs e)
{
List newList = new List();
newList.ID = Guid.NewGuid();
newList.UserID = SettingsViewModel.Instance.UserId;
newList.Name = "New List";
newList.Description = "Enter Description.";
newList.CreatedDate = DateTime.Now;
NavigationService.Navigate(new Uri("/AddListView.xaml", UriKind.Relative));
(Application.Current.RootVisual as FrameworkElement).DataContext = newList;
}
/// <summary>
/// Deletes the specified list.
///
/// NOTE: Because of the fact that the context doesn't handle referential
/// integrity, the application must handle the cascading delete
/// </summary>
/// <param name="list"></param>
public void DeleteList(DefaultScope.List list)
{
// First find all items that are in the list and delete them
List <Item> listItems = (from i in context.ItemCollection
where i.ListID == list.ID
select i).ToList();
foreach (Item i in listItems)
{
DeleteItem(i);
}
// once all items are deleted, delete the list
context.DeleteList(list);
}
/// <summary>
/// Constructor which takes the context Item that is being wrapped and its associated context.
/// </summary>
/// <param name="item"></param>
/// <param name="context"></param>
public ModelItem(Item item, ListSampleOfflineContext context)
{
this.item = item;
this.context = context;
tags = null;
unusedTags = null;
usedTags = new Dictionary <int, int>();
list = null;
// Materialize the priority and status from the ids in the item
UpdatePriority();
UpdateStatus();
// Register for any events that occur on the item
item.PropertyChanged += new PropertyChangedEventHandler(item_PropertyChanged);
// Register for any changes to the tag item mappings
((INotifyCollectionChanged)context.TagItemMappingCollection).CollectionChanged += new NotifyCollectionChangedEventHandler(ModelItem_CollectionChanged);
}
public List<Item> GetAllItems(Guid listId)
{
var items = new List<Item>();
using (var command = new SqlCeCommand())
{
command.Connection = GetSqlCeConnection();
command.CommandText = GET_ALL_ITEMS;
command.Parameters.Add("@ListID", SqlDbType.UniqueIdentifier).Value = listId;
SqlCeDataReader reader = command.ExecuteReader();
while (reader.Read())
{
var i = new Item
{
ID = (Guid)reader["ID"],
Name = reader["Name"] as string,
Description = reader["Description"] as string,
ListID = (Guid)reader["ListID"],
Priority = reader["Priority"] as int?,
Status = reader["Status"] as int?,
UserID = (Guid)reader["UserID"],
ServiceMetadata = new OfflineEntityMetadata()
{
IsTombstone = (bool)reader["IsTombstone"],
Id = reader["_MetadataID"] as string
}
};
items.Add(i);
}
}
return items;
}
/// <summary>
/// Gets the corresponding model list for a context list
/// </summary>
/// <param name="list"></param>
/// <returns></returns>
public ModelList GetList(DefaultScope.List list)
{
return(new ModelList(list, context));
}
public List<Priority> GetAllPriority()
{
var priorities = new List<Priority>();
using (var command = new SqlCeCommand())
{
command.Connection = GetSqlCeConnection();
command.CommandText = GET_ALL_PRIORITY;
SqlCeDataReader reader = command.ExecuteReader();
while (reader.Read())
{
var p = new Priority()
{
ID = (int)reader["ID"],
Name = reader["Name"] as string,
ServiceMetadata = new OfflineEntityMetadata()
{
IsTombstone = false,
Id = reader["_MetadataID"] as string
}
};
priorities.Add(p);
}
}
return priorities;
}
public void AddList(List entity) {
base.AddItem<List>(entity);
}
public List<Status> GetAllStatus()
{
var statuses = new List<Status>();
using (var command = new SqlCeCommand())
{
command.Connection = GetSqlCeConnection();
command.CommandText = GET_ALL_STATUS;
SqlCeDataReader reader = command.ExecuteReader();
while (reader.Read())
{
var p = new Status
{
ID = (int) reader["ID"],
Name = reader["Name"] as string,
ServiceMetadata = new OfflineEntityMetadata()
{
IsTombstone = false,
Id = reader["_MetadataID"] as string
}
};
statuses.Add(p);
}
}
return statuses;
}
public List<Tag> GetAllTags()
{
var tags = new List<Tag>();
using (var command = new SqlCeCommand())
{
command.Connection = GetSqlCeConnection();
command.CommandText = GET_ALL_TAGS;
SqlCeDataReader reader = command.ExecuteReader();
while (reader.Read())
{
var t = new Tag
{
ID = (int) reader["ID"],
Name = reader["Name"] as string,
ServiceMetadata = new OfflineEntityMetadata()
{
IsTombstone = false,
Id = reader["_MetadataID"] as string
}
};
tags.Add(t);
}
}
return tags;
}
public void DeleteList(List entity) {
base.DeleteItem<List>(entity);
}
void ItemDetailView_Loaded(object sender, RoutedEventArgs e1)
{
this.listObj = SyncContextInstance.Context.ListCollection.Where((e) => e.ID.Equals((this.DataContext as Item).ListID)).FirstOrDefault();
addMode = (this.DataContext as Item).EntityState == Microsoft.Synchronization.ClientServices.IsolatedStorage.OfflineEntityState.Detached;
// If add mode then only the done button will be visible
if (addMode)
{
FlipToEditMode();
(this.ApplicationBar.Buttons[0] as ApplicationBarIconButton).IsEnabled = false;
(this.ApplicationBar.Buttons[1] as ApplicationBarIconButton).IsEnabled = false;
(this.ApplicationBar.Buttons[2] as ApplicationBarIconButton).IsEnabled = true;
(this.ApplicationBar.Buttons[3] as ApplicationBarIconButton).IsEnabled = false;
}
}
/// <summary>
/// Gets a new materialized list
/// </summary>
private void UpdateList()
{
list = (from l in context.ListCollection
where l.ID == item.ListID
select l).FirstOrDefault();
}
public object GetAllLists()
{
var lists = new List<List>();
using (var command = new SqlCeCommand())
{
command.Connection = GetSqlCeConnection();
command.CommandText = GET_ALL_LISTS;
SqlCeDataReader reader = command.ExecuteReader();
while (reader.Read())
{
var l = new List
{
ID = (Guid) reader["ID"],
Name = reader["Name"] as string,
Description = reader["Description"] as string,
CreatedDate = (DateTime) reader["CreatedDate"],
UserID = (Guid)reader["UserID"],
ServiceMetadata = new OfflineEntityMetadata()
{
IsTombstone = (bool)reader["IsTombstone"],
Id = reader["_MetadataID"] as string
}
};
lists.Add(l);
}
}
return lists;
}
/// <summary>
/// Gets all entities that were created/modified/deleted locally after the last sync.
/// </summary>
/// <param name="state">A unique identifier for the changes that are uploaded</param>
/// <returns>The set of incremental changes to send to the service.</returns>
public IEnumerable<SqlCeOfflineEntity> GetChanges(Guid state)
{
var changeList = new List<SqlCeOfflineEntity>();
using (GetSqlCeConnection())
{
SqlCeTransaction transaction = _connection.BeginTransaction();
try
{
using (var command = new SqlCeCommand(SELECT_ITEM_CHANGES, GetSqlCeConnection()))
{
var reader = command.ExecuteReader();
while (reader.Read())
{
var item = new Item
{
ID = (Guid)reader["ID"],
ListID = (Guid)reader["ListID"],
UserID = (Guid)reader["UserID"],
Name = reader["Name"] as string,
Description = reader["Description"] as string,
Priority = reader["Priority"] as int?,
Status = reader["Status"] as int?,
StartDate = reader["StartDate"] as DateTime?,
EndDate = reader["EndDate"] as DateTime?,
ServiceMetadata = new OfflineEntityMetadata()
{
IsTombstone = (bool)reader["IsTombstone"],
Id = reader["_MetadataID"] as string
}
};
changeList.Add(item);
}
}
using (var command = new SqlCeCommand(SELECT_LIST_CHANGES, GetSqlCeConnection()))
{
var reader = command.ExecuteReader();
while (reader.Read())
{
var listItem = new List
{
ID = (Guid)reader["ID"],
Name = reader["Name"] as string,
Description = reader["Description"] as string,
UserID = (Guid)reader["UserID"],
CreatedDate = (DateTime)reader["CreatedDate"],
ServiceMetadata = new OfflineEntityMetadata()
{
IsTombstone = (bool)reader["IsTombstone"],
Id = reader["_MetadataID"] as string
}
};
changeList.Add(listItem);
}
}
using (var command = new SqlCeCommand(SELECT_TAGITEMMAPPING_CHANGES, GetSqlCeConnection()))
{
var reader = command.ExecuteReader();
while (reader.Read())
{
var tagItemMapping = new TagItemMapping
{
TagID = (int)reader["TagID"],
ItemID = (Guid)reader["ItemID"],
UserID = (Guid)reader["UserID"],
ServiceMetadata = new OfflineEntityMetadata()
{
IsTombstone = (bool)reader["IsTombstone"],
Id = reader["_MetadataID"] as string
}
};
changeList.Add(tagItemMapping);
}
}
transaction.Commit();
}
catch
{
transaction.Rollback();
throw;
}
}
return changeList;
}
private void MenuItemSave_Click(object sender, System.EventArgs e)
{
if (String.IsNullOrEmpty(this.textBoxName.Text))
{
MessageBox.Show("List name cannot be empty", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation,
MessageBoxDefaultButton.Button1);
return;
}
try
{
if (IsNewItem)
{
var listItem = new List
{
ID = Guid.NewGuid(),
Name = textBoxName.Text,
Description = textBoxDescription.Text,
CreatedDate = DateTime.Now,
UserID = new Guid(Settings.ClientId),
ServiceMetadata = new OfflineEntityMetadata() { IsTombstone = false }
};
var storageHandler = new SqlCeStorageHandler();
storageHandler.InsertList(listItem, true);
MessageBox.Show("List created!", "Success", MessageBoxButtons.OK, MessageBoxIcon.None,
MessageBoxDefaultButton.Button1);
}
else
{
ListItem.Name = textBoxName.Text.Trim();
ListItem.Description = textBoxDescription.Text.Trim();
var storageHandler = new SqlCeStorageHandler();
storageHandler.UpdateList(ListItem, true);
MessageBox.Show("List updated!", "Success", MessageBoxButtons.OK, MessageBoxIcon.None,
MessageBoxDefaultButton.Button1);
}
this.Close();
}
catch (Exception exception)
{
MessageBox.Show(exception.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation,
MessageBoxDefaultButton.Button1);
}
}
