如何轻松获得顶级域名?

问题描述

http://www.codeproject.com/Questions/ask.aspx ==> http://www.codeproject.com

http://t.codeproject.com/Questions/ask.aspx ==> http://www.codeproject.com

http://news.codeproject.com/Questions/ask.aspx ==> http://www.codeproject.com

http://news.codeproject.com.cn/Questions/ask.aspx ==> http://www.codeproject.com.cn


以上是示例，我想获取顶级域名.


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使用uri类，我仅获得2〜4以上的子级别域.

http://www.codeproject.com/Questions/ask.aspx ==> http://www.codeproject.com

http://t.codeproject.com/Questions/ask.aspx ==> http://www.codeproject.com

http://news.codeproject.com/Questions/ask.aspx ==> http://www.codeproject.com

http://news.codeproject.com.cn/Questions/ask.aspx ==> http://www.codeproject.com.cn


Above is example,I want to get the top level domain.


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use the uri class I just get the sub level domain for above 2~4 example

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