Replace "\\" with "\" in a String in C#

C# string replace

Try this:

line.Replace("\",\"", ";")

c# replace \ characters

Were you trying it like this:

string text = GetTextFromSomewhere();
text.Replace("\\", "");
text.Replace("\"", "");

? If so, that's the problem - Replace doesn't change the original string, it returns a new string with the replacement performed... so you'd want:

string text = GetTextFromSomewhere();
text = text.Replace("\\", "").Replace("\"", "");

Note that this will replace each backslash and each double-quote character; if you only wanted to replace the pair "backslash followed by double-quote" you'd just use:

string text = GetTextFromSomewhere();
text = text.Replace("\\\"", "");

(As mentioned in the comments, this is because strings are immutable in .NET - once you've got a string object somehow, that string will always have the same contents. You can assign a reference to a different string to a variable of course, but that's not actually changing the contents of the existing string.)

Replace \\ with \ in a string in C#

I suspect your string already actually only contains a single backslash, but you're looking at it in the debugger which is escaping it for you into a form which would be valid as a regular string literal in C#.

If print it out in the console, or in a message box, does it show with two backslashes or one?

If you actually want to replace a double backslash with a single one, it's easy to do so:

text = text.Replace(@"\\", @"\");

... but my guess is that the original doesn't contain a double backslash anyway. If this doesn't help, please give more details.

EDIT: In response to the edited question, your stringToBeReplaced only has a single backslash in. Really. Wherever you're seeing two backslashes, that viewer is escaping it. The string itself doesn't have two backslashes. Examine stringToBeReplaced.Length and count the characters.

Replacing '\' with \\ in string C#

The issue lies in the fact that you're trying to store a backslash as a file name, which isn't possible. If you could do that, how would the computer know whether or not you're attempting to access a directory or a file?

Your best option is to replace the backslash with another character. You seem to be using the standard Base64 alphabet so I'd suggest the character "-" as it's a common character that isn't used as part of Base64 encoding.

uniqueID.Replace(@"\", "-");

That character can be replaced by a ton of other characters (*._~ etc) that aren't used in regular Base64 though.

Make sure to replace the character with a backslash when trying to interpret it, though!

String Replace \\\ with \

To replace \\\ with \ in a c# string try this code (tested and working)

 string strRegex = @"(\\){3}";
 string strTargetString = @"sett\\\abc";
 var test=Regex.Replace(strTargetString, strRegex, @"\"); //test becomes sett\abc

in debug you will see test=sett\\abc (2 backslashes but one is an escape).
Don't worry and go to text Visualizer and you'll see the correct value

then

in your specific case the code will be

 string sample = @"<ArrayOfMyObject xmlns:i=\\\"http://www.w3.org/2001/XMLSchema-instance\\\"";
var result=Regex.Replace(sample , strRegex, @"\");

Replace \\ with \ in C#

In C#, you can't have a string like "a\b\c\d", because the \ has a special meaning: it creates a escape sequence together with a following letter (or combination of digits).

\b represents actually a backspace, and \c and \d are invalid escape sequences (the compiler will complain about an "Unrecognized escape sequence").

So how do you create a string with a simple \? You have to use a backslash to espace the backslash:\\ (it's the espace sequence that represents a single backslash).

That means that the string "a\\b\\c\\d" actually represents a\b\c\d (it doesn't represent a\\b\\c\\d, so no double backslashes). You'll see it yourself if you try to print this string.

C# also has a feature called verbatim string literals (strings that start with @), which allows you to write @"a\b\c\d" instead of "a\\b\\c\\d".

c# replace string with many x

You can create a new string of "x" repeated the number of characters in your word. No need for regexes.

word.Text = new string('x', word.Text.Length);

Replacing all the '\' chars to '/' with C#

The Replace function seems suitable:

string input = @"c:\abc\def";
string result = input.Replace(@"\", "/");

And be careful with a common gotcha:

Due to string immutability in .NET this function doesn't modify the string instance you are invoking it on => it returns the result.

Replace '\' with '/' in a String C# WinForm App

You'll need to capture the result of the Replace (strings are immutable), and ensure you use character-escaping for the \:

string path = Directory.GetCurrentDirectory();
path = path.Replace("\\", "/");

For info; most of the inbuilt methods will accept either, and assuming you are on Windows, \ would be more common anyway. If you want a uri, then use a Uri:

string path = Directory.GetCurrentDirectory();
Uri uri = new Uri(path); // displays as "file:///C:/Users/mgravell/AppData/Local/Temporary Projects/ConsoleApplication1/bin/Debug"
string abs = uri.AbsolutePath; // "C:/Users/mgravell/AppData/Local/Temporary%20Projects/ConsoleApplication1/bin/Debug"

Replace the string of special characters in C#

I believe, best is to use a regular expression here as below

s/[*'",_&#^@]/ /g

You can use Regex class for this purpose

Regex reg = new Regex("[*'\",_&#^@]");
str1 = reg.Replace(str1, string.Empty);

Regex reg1 = new Regex("[ ]");
str1 = reg.Replace(str1, "-");

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