如何通过现有的文件，以检测System.IO.IOException原因是什么？ [英] How to detect System.IO.IOException cause by existing file?
问题描述
我想创建和打开一个文件，但只有当犯规存在的话。我不想使用File.Exists，因为它创建具有相同名称的文件后，切换线程。
I want to create and open a file but only if it doesnt exist. I dont want to use a File.Exists because a thread by switch after it creating a file with the same name.
我如何检查是否异常System.IO。 IOException异常是由现有的文件引起的？我不喜欢解析错误味精（即使寿它可以像.indexOf简单（存在））
How do i check if the exception System.IO.IOException was caused by the file existing? I prefer not to parse the error msg (even tho it can be as simple as .indexOf("exist"))
我应该怎么做呢？
推荐答案
您应该避免以往任何时候都使得基础上，Exception.Message属性的内容逻辑的决定。被定义为人类可读的消息时，不是对一个程序来读取。这些消息如有更改，恕不另行通知。
You should avoid ever making logic decisions based on the contents of the Exception.Message property. That is defined to be a human-readable message, not something for a program to read. Such messages are subject to change without notice.
可读信息经常改变，使他们更容易阅读到人类。这不会使你的程序更幸福。
Human-readable messages often change to make them more readable to humans. That won't make your program any happier.
正如你可能能够告诉，这取决于人类可读的消息程序逻辑的问题是我的忌讳 - 我不会告诉你多久，因为这会让我觉得自己老了。这已经心烦意乱我从东西应该是很明显的。
As you might be able to tell, the issue of program logic depending on human-readable messages is a pet peeve of mine - I won't tell you for how long, since that would make me feel old. This has distracted me from something that should have been obvious.
请检查一下，如果你得到一个的当文件不存在System.IO.FileNotFoundException 。尝试追赶，与其IOException异常。
Please check to see if you get a System.IO.FileNotFoundException when the file does not exist. Try catching that instead of IOException.
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