public T GetElement <T>(string elementId) where T : ScriptElement
{
ScriptElement e = null;
if (!_elementsCache.TryGetValue(elementId, out e))
{
lock (_elementsCache)
{
if (!_elementsCache.TryGetValue(elementId, out e))
{
DTObject element = GetElementById(elementId);
if (element == null)
{
//没有找到输入项时，采用自由模式
element = DTObject.Create("{id,metadata:{}}");
element.SetValue("id", elementId);
_scriptHeader.AppendFormat("var {0} = $('#{0}');", elementId);
}
//if (element == null) throw new XamlException("没有找到编号为" + elementId + "的脚本元素");
e = ElementFactory.Create <T>(this, element) as T;
_elementsCache.Add(elementId, e);
}
}
}
return((T)e);
}
/// <summary>
/// 获得视图的提交者
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public T GetSender <T>() where T : ScriptElement
{
if (_sender == null)
{
if (_input == null)
{
throw new XamlException("视图没有提交者");
}
var sender = _input.GetObject("sender", null);//{sender:{},elements:[{id:'xxxx',metadata:xxxx}]}
if (sender == null)
{
throw new XamlException("视图没有提交者");
}
_sender = ElementFactory.Create <T>(this, sender);
}
return(_sender as T);
}
