public static void BeginUpdate <T>(T obj, EventHandler <DataPortalResult <T> > callback, object userState)
where T : IMobileObject
{
DataPortal <T> dp = new DataPortal <T>();
dp.UpdateCompleted += callback;
dp.BeginUpdate(obj, userState);
}
/// <summary>
/// Saves the specified item in the list.
/// </summary>
/// <param name="index">
/// Index of the item to be saved.
/// </param>
/// <remarks>
/// This method properly saves the child item,
/// by making sure the item in the collection
/// is properly replaced by the result of the
/// Save() method call.
/// </remarks>
public virtual void SaveItem(int index)
{
T item = this[index];
var handleBusy = false;
if (item.IsDeleted || (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);
}
// save object
DataPortal <T> dp = new DataPortal <T>();
dp.UpdateCompleted += (o, e) =>
{
if (handleBusy)
{
MethodCaller.CallMethodIfImplemented(item, "MarkIdle");
}
if (e.Error == null)
{
T result = e.Object;
if (item.IsDeleted)
{
//SafeRemoveItem will raise INotifyCollectionChanged event
SafeRemoveItem(index);
}
else
{
for (int tmp = 1; tmp <= editLevel; tmp++)
{
result.CopyState(tmp, false);
}
SafeSetItem(index, result);
#if SILVERLIGHT
//Because SL Data Grid does not support replace action.
// we have to artificially raise remove/insert events
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, item, index));
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, this[index], index));
#else
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Replace, result, item));
#endif
}
#if SILVERLIGHT
item.SaveComplete(result, null, null);
#else
item.SaveComplete(result);
#endif
OnSaved(result, null);
}
else
{
#if SILVERLIGHT
item.SaveComplete(item, e.Error, null);
#else
item.SaveComplete(item);
#endif
OnSaved(item, e.Error);
}
};
dp.BeginUpdate(savable);
}
}
/// <summary>
/// Starts an async operation to save the object to the database.
/// </summary>
/// <param name="handler">
/// Method called when the operation is complete.
/// </param>
/// <param name="userState">User state object.</param>
public virtual void BeginSave(EventHandler <SavedEventArgs> handler, object userState)
{
if (this.IsChild)
{
var error = new InvalidOperationException(Resources.NoSaveChildException);
OnSaved(null, error, userState);
if (handler != null)
{
handler(this, new SavedEventArgs(null, error, userState));
}
}
else if (EditLevel > 0)
{
var error = new InvalidOperationException(Resources.NoSaveEditingException);
OnSaved(null, error, userState);
if (handler != null)
{
handler(this, new SavedEventArgs(null, error, userState));
}
}
else if (!IsValid)
{
Rules.ValidationException error = new Rules.ValidationException(Resources.NoSaveInvalidException);
OnSaved(null, error, userState);
if (handler != null)
{
handler(this, new SavedEventArgs(null, error, userState));
}
}
else if (IsBusy)
{
var error = new InvalidOperationException(Resources.BusyObjectsMayNotBeSaved);
OnSaved(null, error, userState);
if (handler != null)
{
handler(this, new SavedEventArgs(null, error, userState));
}
}
else
{
if (IsDirty)
{
if (userState == null)
{
DataPortal.BeginUpdate <T>(this, (o, e) =>
{
T result = e.Object;
OnSaved(result, e.Error, e.UserState);
if (handler != null)
{
handler(result, new SavedEventArgs(result, e.Error, null));
}
});
}
else
{
DataPortal.BeginUpdate <T>(this, (o, e) =>
{
T result = e.Object;
OnSaved(result, e.Error, e.UserState);
if (handler != null)
{
handler(result, new SavedEventArgs(result, e.Error, e.UserState));
}
}, userState);
}
}
else
{
OnSaved((T)this, null, userState);
if (handler != null)
{
handler(this, new SavedEventArgs(this, null, userState));
}
}
}
}
/// <summary>
/// Starts an async operation to save the object to the database.
/// </summary>
/// <param name="forceUpdate">
/// If <see langword="true"/>, triggers overriding IsNew and IsDirty.
/// If <see langword="false"/> then it is the same as calling Save().
/// </param>
/// <param name="handler">
/// Method called when the operation is complete.
/// </param>
/// <param name="userState">User state data.</param>
public virtual void BeginSave(bool forceUpdate, EventHandler <SavedEventArgs> handler, object userState)
{
if (forceUpdate && IsNew)
{
// mark the object as old - which makes it
// not dirty
MarkOld();
// now mark the object as dirty so it can save
MarkDirty(true);
}
if (this.IsChild)
{
var error = new InvalidOperationException(Resources.NoSaveChildException);
OnSaved(null, error, userState);
if (handler != null)
{
handler(this, new SavedEventArgs(null, error, userState));
}
}
else if (EditLevel > 0)
{
var error = new InvalidOperationException(Resources.NoSaveEditingException);
OnSaved(null, error, userState);
if (handler != null)
{
handler(this, new SavedEventArgs(null, error, userState));
}
}
else if (!IsValid && !IsDeleted)
{
Rules.ValidationException error = new Rules.ValidationException(Resources.NoSaveInvalidException);
OnSaved(null, error, userState);
if (handler != null)
{
handler(this, new SavedEventArgs(null, error, userState));
}
}
else if (IsBusy)
{
var error = new InvalidOperationException(Resources.BusyObjectsMayNotBeSaved);
OnSaved(null, error, userState);
if (handler != null)
{
handler(this, new SavedEventArgs(null, error, userState));
}
}
else
{
if (IsDirty)
{
MarkBusy();
if (userState == null)
{
DataPortal.BeginUpdate <T>(this, (o, e) =>
{
T result = e.Object;
OnSaved(result, e.Error, e.UserState);
if (handler != null)
{
handler(result, new SavedEventArgs(result, e.Error, e.UserState));
}
MarkIdle();
});
}
else
{
DataPortal.BeginUpdate <T>(this, (o, e) =>
{
T result = e.Object;
OnSaved(result, e.Error, e.UserState);
if (handler != null)
{
handler(result, new SavedEventArgs(result, e.Error, e.UserState));
}
MarkIdle();
}, userState);
}
}
else
{
OnSaved((T)this, null, userState);
if (handler != null)
{
handler(this, new SavedEventArgs(this, null, userState));
}
}
}
}
