检查字典中是否存在密钥 [英] checking if key exists in dictionary

问题描述

您如何检查字典中是否存在键?

How do you check to see if a key exists in a Dictionary?

推荐答案

您可以判断字典中是否包含键，因为它会赢得键.除非这是个很小的钥匙，否则不能正确关闭.

坦白地说，您花费的时间比看自己要花费的时间更多. 文档 [

You can tell if a dictionary has a key in it because it won''t close properly, unless it''s a really small key.

Honestly, you spent more time typing that message than it would have taken to just look yourself. Documentation[^] It''s not just there for fun.

只需使用 ContainsKey方法 [

Just use ContainsKey Method[^] to check a key existence in the dictionary.

除了Wonde建议的那样:您还可以使用System.Collections.Generic.Dictionary.TryGetValue，请参见 http://msdn.microsoft.com/en-us/library/bb347013.aspx [ ^ ].

要确认SK Genius所说的话，您输入该信息所花的时间将比仅仅看自己要花费更多的时间.

—SA

In addition to what Wonde advised: you can also use System.Collections.Generic.Dictionary.TryGetValue, see http://msdn.microsoft.com/en-us/library/bb347013.aspx[^].

To confirm what SK Genius say, you would spent more time typing that message than it would have taken to just look yourself.

—SA

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