我应该使用空字符串,为什么? [英] Which should I use for empty string and why?
问题描述
可能重复:
<一href="http://stackoverflow.com/questions/151472/what-is-the-difference-between-string-empty-and">What是的String.Empty和&ldquo之间的差异;&rdquo;的
我应使用分配一个空字符串及以下的,为什么?
字符串VARIABLENAME =;
或
字符串VARIABLENAME =的String.Empty;
的String.Empty
是通常建议。
为什么呢?因为它传达的意思,你很明确地说,你希望字符串是空的。
此外,,
创建一个字符串对象(此对象将会在应用程序中重用,因为在.NET中字符串的实习),的String.Empty
不创建一个新的对象。请参见这里。
Possible Duplicate:
What is the difference between String.Empty and “”
Which of the following should I use for assigning an empty string and why?
string variableName = "";
or
string variableName = string.Empty;
String.Empty
is what is normally recommended.
Why? Because it conveys meaning, you are very explicitly saying that you want the string to be empty.
Additionally, ""
creates a string object (this object will be reused across the applications, because strings in .NET are interned), String.Empty
does not create a new object. See here.
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