/// <summary>
/// Accepts changes to the business object, and
/// commits them by calling the object's Save()
/// method.
/// </summary>
/// <remarks>
/// <para>
/// This method does nothing unless the object
/// implements Csla.Core.ISavable.
/// </para><para>
/// If the object implements IClonable, it
/// will be cloned, and the clone will be
/// saved.
/// </para><para>
/// If the object supports n-level undo and
/// ManageLifetime is true, then this method
/// will automatically call ApplyEdit() and
/// BeginEdit() appropriately.
/// </para>
/// </remarks>
public void Save()
{
// only do something if the object implements
// ISavable
Csla.Core.ISavable savable = this.Data as Csla.Core.ISavable;
if (savable != null)
{
object result = savable;
Exception exceptionResult = null;
try
{
IsBusy = true;
// clone the object if possible
ICloneable clonable = savable as ICloneable;
if (clonable != null)
{
savable = (Csla.Core.ISavable)clonable.Clone();
}
// apply edits in memory
Csla.Core.ISupportUndo undo = savable as Csla.Core.ISupportUndo;
if (undo != null && _manageLifetime)
{
undo.ApplyEdit();
}
// save the clone
result = savable.Save();
if (!ReferenceEquals(savable, this.Data) && !Csla.ApplicationContext.AutoCloneOnUpdate)
{
// raise Saved event from original object
Core.ISavable original = this.Data as Core.ISavable;
if (original != null)
{
original.SaveComplete(result);
}
}
// start editing the resulting object
undo = result as Csla.Core.ISupportUndo;
if (undo != null && _manageLifetime)
{
undo.BeginEdit();
}
}
catch (Exception ex)
{
exceptionResult = ex;
}
// clear previous object
OnQueryFinished(null, exceptionResult, null, null);
// return result to base class
OnQueryFinished(result, null, null, null);
IsBusy = false;
OnSaved(result, exceptionResult, null);
}
}
/// <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 T SaveItem(int index)
{
bool raisingEvents = this.RaiseListChangedEvents;
this.RaiseListChangedEvents = false;
_activelySaving = true;
T item = default(T);
T result = default(T);
try
{
item = this[index];
result = item;
T savable = item;
// clone the object if possible
ICloneable clonable = savable as ICloneable;
if (clonable != null)
{
savable = (T)clonable.Clone();
}
// commit all changes
int editLevel = savable.EditLevel;
for (int tmp = 1; tmp <= editLevel; tmp++)
{
savable.AcceptChanges(editLevel - tmp, false);
}
// do the save
result = (T)savable.Save();
if (!ReferenceEquals(result, item))
{
// restore edit level to previous level
for (int tmp = 1; tmp <= editLevel; tmp++)
{
result.CopyState(tmp, false);
}
// put result into collection
this[index] = result;
}
if (!ReferenceEquals(savable, item))
{
// raise Saved event from original object
Core.ISavable original = item as Core.ISavable;
if (original != null)
{
original.SaveComplete(result);
}
}
OnSaved(result, null);
}
finally
{
_activelySaving = false;
this.RaiseListChangedEvents = raisingEvents;
}
this.OnListChanged(new ListChangedEventArgs(ListChangedType.ItemChanged, index));
return(result);
}
