C# 替换字符串中的反斜杠
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Replacing backslash in a string
提问by mezamorphic
I am having a few problems with trying to replace backslashes in a date string on C# .net.
我在尝试替换 C# .net 上的日期字符串中的反斜杠时遇到了一些问题。
So far I am using:
到目前为止，我正在使用：
string.Replace(@"\","-")
but it hasnt done the replacement. Could anyone please help?
但它没有完成更换。有人可以帮忙吗？
采纳答案by Jon
string.Replacedoes not modify the string itself but returns a new string, which most likely you are throwing away. Do this instead:
string.Replace不会修改字符串本身，而是返回一个新字符串，您很可能会丢弃该字符串。改为这样做：
myString= myString.Replace(@"\","-");
On a side note, this kind of operation is usually seen in code that manually mucks around with formatted date strings. Most of the time there is a better way to do what you want (which is?) than things like this.
附带说明一下，这种操作通常出现在手动处理格式化日期字符串的代码中。大多数情况下，有比这样的事情更好的方法来做你想做的事（这是什么？）。
回答by Nikhil Agrawal
Use it this way.
以这种方式使用它。
oldstring = oldstring.Replace(@"\","-");
Look for String.Replacereturn type.
寻找String.Replace返回类型。
Its a function which returns a corrected string. If it would have simply changed old string then it would had a voidreturn type.
它是一个返回更正字符串的函数。如果它只是简单地改变了旧字符串，那么它就会有一个void返回类型。
回答by ericosg
You could also use:
您还可以使用：
myString = myString.Replace('\', '-'));
but just letting you know, date slashes are usually forward ones /, and not backslashes \.
但只是让您知道，日期斜杠通常是正斜杠/，而不是反斜杠\。
回答by ABH
As suggested by others that String.Replace doesn't update the original string object but it returns a new string instead.
正如其他人所建议的那样， String.Replace 不会更新原始字符串对象，而是返回一个新字符串。
myString= myString.Replace(@"\","-");
It's worthwhile for you to understand that string is immutable in C# basically to make it thread-safe. More details about strings and why they are immutable please see links hereand here
理解字符串在 C# 中是不可变的基本上是为了使其线程安全是值得的。有关字符串的更多详细信息以及它们为何不可变，请参阅此处和此处的链接
回答by Dhaval
as all of them saying you need to take value back in the variable.
正如他们所有人都说你需要取回变量中的值。
so it should be
所以应该是
val1= val1.Replace(@"\","-");
Or
或者
val1= val1.Replace("\","-");
but not only .. below one will not work
但不仅..低于一个将不起作用
val1.Replace(@"\","-");
