protected override IAsyncResult BeginExecute(AsyncCodeActivityContext context, AsyncCallback callback, object state)
{
try
{
m_Delegate = new runDelegate(Run);
string filterText = FilterText.Get(context);
TreeScope treeScope;
if (Scope == ScopeOption.Children)
{
treeScope = TreeScope.Children;
}
else if (Scope == ScopeOption.Descendants)
{
treeScope = TreeScope.Descendants;
}
else
{
treeScope = TreeScope.Subtree;
}
UiElement element = null;
var selStr = Selector.Get(context);
element = Common.GetValueOrDefault(context, this.Element, null);
if (element == null && selStr != null)
{
element = UiElement.FromSelector(selStr);
}
else
{
PropertyDescriptor property = context.DataContext.GetProperties()[EleScope.GetEleScope];
element = property.GetValue(context.DataContext) as UiElement;
}
List <UiElement> uiList = new List <UiElement>();
uiList = element.FindAllByFilter(treeScope, TrueCondition.Default, filterText);
UiList.Set(context, uiList);
return(m_Delegate.BeginInvoke(callback, state));
}
catch (Exception e)
{
SharedObject.Instance.Output(SharedObject.enOutputType.Error, "获取子节点元素失败", e.Message);
if (ContinueOnError.Get(context))
{
return(m_Delegate.BeginInvoke(callback, state));
}
else
{
throw e;
}
}
}