C# 字符串替换实际上并不替换字符串中的值 [英] C# string replace does not actually replace the value in the string
问题描述
我正在尝试用另一个字符串替换字符串的一部分.更准确地说我有 C:UsersDesktopProjectinDebug
I am trying to replace a part of string with another another string. To be more precise
I have C:UsersDesktopProjectinDebug
我正在尝试用 ResourcesPeople
我尝试了以下方法:
path.Replace(@"inDebug", @"ResourcePeopleVisitingFaculty.txt");
path.Replace("\bin\Debug", "\Resource\People\VisitingFaculty.txt");
以上两个似乎都不起作用，因为字符串保持不变并且没有被替换.难道我做错了什么?
None of the above two seems to work, as the string remains the same and nothing is replaced. Am I doing something wrong?
推荐答案
问题在于字符串是不可变的.replace、substring 等方法不会更改字符串本身.他们创建一个新字符串并替换它.所以为了上面的代码正确，应该是
The problem is that strings are immutable. The methods replace, substring, etc. do not change the string itself. They create a new string and replace it. So for the above code to be correct, it should be
path1 = path.Replace("\bin\Debug", "\Resource\People\VisitingFaculty.txt");
或者只是
path = path.Replace("\bin\Debug", "\Resource\People\VisitingFaculty.txt");
如果不需要另一个变量.
if another variable is not needed.
这个答案也提醒我们字符串是不可变的.您对它们所做的任何更改实际上都会创建一个新字符串.因此，请记住涉及字符串的所有内容，包括内存管理.如文档中所述此处.
This answer is also a reminder that strings are immutable. Any change you make to them will in fact create a new string. So keep that in mind with everything that involves strings, including memory management. As stated in the documentation here.
String 对象是不可变的:它们在拥有之后不能被改变被创建.出现的所有字符串方法和 C# 运算符修改一个字符串实际上返回一个新的字符串对象中的结果
String objects are immutable: they cannot be changed after they have been created. All of the String methods and C# operators that appear to modify a string actually return the results in a new string object
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