我在申请中从互联网下载文件。 现在,处理多种档案类型的Im需要能够发现在我提出申请之前档案类型是什么。 我面临的问题是,一些正在从卷宗中下载的URLs。
例如:
http://www.myfaketestsite.com/myaudio.mp3?id=20
最初,我使用<代码>String.EndsWith()。 显然,这更不利于工作。 关于如何发现档案类型的任何想法?
我在申请中从互联网下载文件。 现在,处理多种档案类型的Im需要能够发现在我提出申请之前档案类型是什么。 我面临的问题是,一些正在从卷宗中下载的URLs。
例如:
http://www.myfaketestsite.com/myaudio.mp3?id=20
最初,我使用<代码>String.EndsWith()。 显然,这更不利于工作。 关于如何发现档案类型的任何想法?
Wrap the URL in a Uri
category. 它将把它分成可使用的不同部分,或可使用<代码>上的助手方法。 缩略语
var uri = new Uri("http://www.myfaketestsite.com/myaudio.mp3?id=20");
string path = uri.GetLeftPart(UriPartial.Path);
// path = "http://www.myfaketestsite.com/myaudio.mp3"
你的问题是:
你们总是可以把问题标记分开,以消除参数。 e.g.
string s = "http://www.myfaketestsite.com/myaudio.mp3?id=20";
string withoutQueryString = s.Split( ? )[0];
如果没有问题标记,它就赢得了问题,因为你仍在从零指数中gra取价值。 然后,你可以在<条码>上解释你的逻辑。
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