C＃字符串替换实际上不会替换字符串中的值 [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另一个字符串。更确切地说
我有 C：\Users\Desktop\Project\bin\Debug
I am trying to replace a part of string with another another string. To be more precise
I have C:\Users\Desktop\Project\bin\Debug
，而我正尝试将 \bin\Debug 替换为 \资源\人
and I am trying to replace \bin\Debug with \Resources\People
我尝试了以下操作：
-
path.Replace（@ \bin\Debug，@ \Resource\People\VisitingFaculty.txt）;
path.Replace（ \\bin\\Debug， \\资源\\人\\VisitingFaculty.txt） ;
以上两个似乎都不起作用，因为字符串保持不变并没有什么被取代。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
问题是字符串是不可变的。方法replace，substring等不会更改字符串本身。他们创建一个新字符串并替换它。因此，上述代码正确无误
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");
如果不需要其他变量
这个答案也提醒人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。
如文档此处所述
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
字符串对象是不可变的：创建
后不能更改它们。所有出现
来修改字符串的String方法和C＃运算符实际上都会在新的字符串对象中返回结果
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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