this.Page和（页）HttpContext.Current.Handler之间的不同 [英] different between this.Page and (Page)HttpContext.Current.Handler
问题描述
HI！
有谁知道之间不同的 this.Page 和（页）HttpContext.Current.Handler
does anybody know about different between this.Page and (Page)HttpContext.Current.Handler?
我有这样的 this.page 返回null一个问题，有人写信给我说用结构的（页）HttpContext.Current.Handler会更好。
i had a problem that this.page returned null, and someone wrote me that using the construct "(Page)HttpContext.Current.Handler" will be better.
- 有什么不同？
- 为什么以及何时 this.page 返回NULL？
- what the different?
- why and when this.page return null?
谢谢！
沙尼
推荐答案
this.Page 将通过搜索它的父层次找到一个控件的页面。
this.Page will find a control's Page by searching it's parent hierarchy.
HttypContext.Current.Handler 将通过查看当前上下文（线程）找到该页面。
HttypContext.Current.Handler will find the page by looking at the current context (thread).
第将为空，即使如果控制尚未投入页面层次结构还没有第二个是有效的。
The first will be null even when the second is valid if the control hasn't been put into the page hierarchy yet.
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