/// <summary>
/// Undo the changes that were made since the last time 'CreateSnapshot' was called.
/// </summary>
public void RevertToPreviousState()
{
_bindingEdit = false;
// We can only undo if we've a state to revert to.
if (EditLevel > 0)
{
// Get the latest state of the object that was pushed on the state-stack
MemoryStream buffer = new MemoryStream((byte[])_stateStack.Pop());
buffer.Position = 0;
BinaryFormatter fmt = new BinaryFormatter();
Hashtable state = (Hashtable)fmt.Deserialize(buffer);
Type currentType = this.GetType();
FieldInfo[] fields;
string fieldName;
do
{
fields = currentType.GetFields(BindingFlags.Public |
BindingFlags.NonPublic |
BindingFlags.Instance);
foreach (FieldInfo field in fields)
{
if (field.DeclaringType == currentType &&
this.IsUndoableField(field))
{
object fieldValue = field.GetValue(this);
IUndoable uf = fieldValue as IUndoable;
if (uf != null)
{
uf.RevertToPreviousState();
}
else
{
fieldName = currentType.Name + "." + field.Name;
field.SetValue(this, state[fieldName]);
}
}
}
currentType = currentType.BaseType;
} while(currentType != typeof(object));
}
}