public static MyRoot GetRoot()
{
var myRoot = DataPortal.Fetch <MyRoot>(null);
myRoot.BusinessRules.CheckRules();
return(myRoot);
}
public static MyRoot GetRoot()
{
return(DataPortal.Fetch <MyRoot>(null));
}
public static MyRoot NewEditableRoot()
{
return(DataPortal.Create <MyRoot>());
}
public static void BeginGetReadOnlyList(string filter, EventHandler <DataPortalResult <CustomerList> > callback)
{
DataPortal.BeginFetch <CustomerList>(filter, callback);
}
public static CustomerList GetReadOnlyList(string filter)
{
return(DataPortal.Fetch <CustomerList>(filter));
}
/// <summary>
/// Called by a factory method in a business class to create
/// a new object, which is loaded with default
/// values from the database.
/// </summary>
/// <param name="objectType">Type of business object to create.</param>
/// <param name="criteria">Object-specific criteria.</param>
/// <returns>A new object, populated with default values.</returns>
public static object Create(Type objectType, object criteria)
{
return(DataPortal <object> .Create(objectType, criteria));
}
/// <summary>
/// Called by a factory method in a business class to create
/// a new object, which is loaded with default
/// values from the database.
/// </summary>
/// <typeparam name="T">Specific type of the business object.</typeparam>
/// <param name="criteria">Object-specific criteria.</param>
/// <returns>A new object, populated with default values.</returns>
public static T Create <T>(object criteria)
{
var dp = new DataPortal <T>();
return(dp.Create(criteria));
}
/// <summary>
/// Starts an asynchronous data portal operation to
/// delete a business object.
/// </summary>
/// <typeparam name="T">
/// Type of business object to delete.
/// </typeparam>
/// <param name="criteria">
/// Criteria describing the object to delete.
/// </param>
public static async Task DeleteAsync <T>(object criteria)
where T : IMobileObject
{
var dp = new DataPortal <T>();
await dp.DeleteAsync(criteria);
}
internal static void Delete(Type objectType, object criteria)
{
DataPortal <object> .Delete(objectType, criteria);
}
/// <summary>
/// Called by a Shared (static in C#) method in the business class to cause
/// immediate deletion of a specific object from the database.
/// </summary>
/// <param name="criteria">Object-specific criteria.</param>
public static void Delete <T>(object criteria)
{
var dp = new DataPortal <T>();
dp.Delete(criteria);
}
/// <summary>
/// Called by the business object's Save() method to
/// insert, update or delete an object in the database.
/// </summary>
/// <remarks>
/// Note that this method returns a reference to the updated business object.
/// If the server-side DataPortal is running remotely, this will be a new and
/// different object from the original, and all object references MUST be updated
/// to use this new object.
/// </remarks>
/// <typeparam name="T">Specific type of the business object.</typeparam>
/// <param name="obj">A reference to the business object to be updated.</param>
/// <returns>A reference to the updated business object.</returns>
public static T Update <T>(T obj)
{
var dp = new DataPortal <T>();
return(dp.Update(obj));
}
internal static object Fetch(Type objectType, object criteria)
{
return(DataPortal <object> .Fetch(objectType, criteria));
}
/// <summary>
/// Called by a factory method in a business class to retrieve
/// an object, which is loaded with values from the database.
/// </summary>
/// <typeparam name="T">Specific type of the business object.</typeparam>
/// <param name="criteria">Object-specific criteria.</param>
/// <returns>An object populated with values from the database.</returns>
public static T Fetch <T>(object criteria)
{
var dp = new DataPortal <T>();
return(dp.Fetch(criteria));
}
/// <summary>
/// Starts an asynchronous data portal operation to
/// create a business object.
/// </summary>
/// <typeparam name="T">
/// Type of business object to create.
/// </typeparam>
/// <param name="criteria">
/// Criteria describing the object to create.
/// </param>
public static async Task <T> CreateAsync <T>(object criteria)
{
DataPortal <T> dp = new DataPortal <T>();
return(await dp.CreateAsync(criteria));
}
/// <summary>
/// Starts an asynchronous data portal operation to
/// create a business object.
/// </summary>
/// <typeparam name="T">
/// Type of business object to create.
/// </typeparam>
public static async Task <T> CreateAsync <T>()
{
DataPortal <T> dp = new DataPortal <T>();
return(await dp.CreateAsync());
}
/// <summary>
/// Saves the specified item in the list.
/// </summary>
/// <param name="index">Index of item to be saved.</param>
/// <param name="delete">true if the item should be deleted.</param>
protected virtual async Task SaveItemAsync(int index, bool delete)
{
T item = this[index];
var handleBusy = false;
if ((item.IsDeleted || delete) || (item.IsValid && item.IsDirty))
{
T savable = item;
// attempt to clone object
ICloneable cloneable = savable as ICloneable;
if (cloneable != null)
{
savable = (T)cloneable.Clone();
MethodCaller.CallMethodIfImplemented(item, "MarkBusy");
handleBusy = true;
}
// commit all changes
int editLevel = savable.EditLevel;
for (int tmp = 1; tmp <= editLevel; tmp++)
{
savable.AcceptChanges(editLevel - tmp, false);
}
if (delete)
{
savable.Delete();
}
Exception error = null;
T result = default(T);
try
{
result = await DataPortal.UpdateAsync <T>((T)savable);
}
catch (AggregateException ex)
{
if (ex.InnerExceptions.Count > 0)
{
error = ex.InnerExceptions[0];
}
else
{
error = ex;
}
}
catch (Exception ex)
{
error = ex;
}
finally
{
if (handleBusy)
{
MethodCaller.CallMethodIfImplemented(item, "MarkIdle");
}
}
// update index - this may have changed under the duration of async call
index = IndexOf(item);
if (error == null && result != null)
{
if (savable.IsDeleted)
{
//SafeRemoveItem will raise INotifyCollectionChanged event
SafeRemoveItem(index);
}
else
{
for (int tmp = 1; tmp <= editLevel; tmp++)
{
result.CopyState(tmp, false);
}
SafeSetItem(index, result);
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, item, index));
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, this[index], index));
}
item.SaveComplete(result);
OnSaved(result, null);
}
else
{
item.SaveComplete(item);
OnSaved(item, error);
}
}
}
