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我不知道任何人都可以給我講解一下:在構造函數中DynamicViewDataDictionary.cs中發生了什麼?
internal sealed class DynamicViewDataDictionary : DynamicObject {
private readonly Func<ViewDataDictionary> _viewDataThunk; //// eg() => ViewData
public DynamicViewDataDictionary(Func<ViewDataDictionary> viewDataThunk)
{
_viewDataThunk = viewDataThunk;
}
private ViewDataDictionary ViewData {
get {
ViewDataDictionary viewData = _viewDataThunk();
Debug.Assert(viewData != null);
return viewData;
}
}
.................
這在WebViewPage實例爲ViewBag財產,與 ()=>的ViewData。所以看來這裏的ViewData屬性會返回自己這個func()?這裏發生了什麼,爲什麼這樣做?
聰明的猜測:-)這正是他們在'DynamicViewDataDictionaryTest'中所做的。 – 2015-06-06 14:22:49