How to escape the character \ in C#?
You just need to escape it:
char c = '\\';
Or you could use the Unicode escape sequence:
char c = '\u005c';
See my article on strings for all the various escape sequences available in string/character literals.
You can escape a backslash using a backslash.
//String
string backslash = "\\";
//Character
char backslash = '\\';
or
You can use the string literal.
string backslash = #"\";
char backslash = #"\"[0];
use double backlash like so "\"
"\\"
cause an escape
If you want to output it in a string, you can write "\\" or as a character, you can write '\\'.
Escape it: "\\"
or use the verbatim syntax: #"\"
Double escape it. Escape escape = no escape! \\
To insert a backslash you need to type it twice:
string myPath = "C:\\Users\\YourUser\\Desktop\\YourFile.txt";
The string myPath should now contain: C:\Users\YourUser\Desktop\YourFile.txt
Related
I can't find a way to find 3 backslashes in a string like the following...
<div><div class=\\\"entry-content\\\">
Here is my code...
string str1 = "<div><div class=\\\"entry-content\\\">";
int k = str1.IndexOf(#"\\\"); // returns -1
Basically, I'm trying to replace 3 backslashes with 1 backslash like in the code below which doesn't work because k is -1
str1 = str1.Replace(#"\\\", #"\");
I want the string to be this "<div><div class=\"entry-content\">"
Your string has only one backslash.
\\\" = \"
So the first one escapes the second backslash. And third backslash escapes the double quote. Result is one backslash and a double quote.
If you want your string to contain all backslashes without escaping use a verbatim string:
string str1 = #"<div><div class=\\\""entry-content\\\"">";
You can read more about escaping and escape sequences here.
string s = "P\04";
string z = s.Replace('\\', '-');
Console.WriteLine(z);
I need to replace '\' character in to '-' character in a string. I tried several ways to replace, couldn't able to do for '\' character only.
Please any one suggest a way to do this
Your code to replace the \ is fine. The problem is with your input string, where the \ escapes the 0. It would work if you had this:
string s = "P\\04";
string z = s.Replace('\\', '-');
Console.WriteLine(z);
The output is P-04 assuming that's what you expect.
string s = #"P\04";
string z = s.Replace('\\', '-');
Console.WriteLine(z);
Add # at the before value of string s to make it a verbatim. That way '\' is treated as is. Otherwise \0 are treated as one character to make a different character.
You can also use Regex,
var result = Regex.Replace(#"P\04", #"\\", #"-");
Console.WriteLine(result);
FIDDLE
string value = "\"2\";;\"0_67011297_2013-10-04_2\";\"dfdfd.sfdsf#fdsfsd.PL\";\"fdsf.fdfd#fsdfsdfd.pl\";\"RASP\";;\"2013-10-04\";\"2013-10-04\";\"fdfdfDwfdsfdsór fdsf\";\"Otwarcie fdsf+ wywiad z fdfdfdfds(Wardfdfdszawa)\";\"pkp\";\"MATEfdfdUSZ.fdsfd#fdsfsd.PL\";\"2014-10-01 15:41:20\";\"2014-10-01 15:41:20\";\"utworzony kod delegacji\"";
How to remove the \" from it?
value.Trim( new Char[] { '\\', '\"'});
doesnt work.
Help
There is no \ symbol in the original string. \ is used to as escape character in your source string.
More reference here
The backslash is used to escape characters (in this case the ").
Why not use ' instead?
string value = "'2';;'0_67011297_2013-10-04_2';'dfdfd.sfdsf#fdsfsd.PL';'fdsf.fdfd#fsdfsdfd.pl';'RASP';;'2013-10-04';
a.s.o.
Try this:
value.Replace(#"\", "")
It replaces "\" with an empty string. # is there so that compiler takes it as it is. If there is no # in front of "\" it won't work.
I need to use " and ' as a character in C#, however they are special characters. So when I put them as character in the string, it will give an error. The issue is that it has many " and ' so I need to find a way to allow me to use these special characters. How can I do that
Use escape sequences: "This is a double-quote: \", and this is a single quote: \'"
Although note that since the string is delimited by double quotes, the \' escape isn't necessary: "This is a double-quote: \", and this is a single quote: '"
Simple prefix your string with # for " use "" This makes newlines easy as pie:
string example = #"A string that has double quote "" and single quote ' also a new line
";
You can use escape character \
Example
var testSTring = "\"test\""
Having a single quote ' in string doesn't trouble C#, its the double quotes ", you have to escape them with backslash like:
string str = "some\"stri'''''ng";
You can also use verbatim string # in the start and then you have to escape double quotes with another double quote like:
string str = #"some""stri'ng";
Put a backslash before special chars you want to use to escape them.
Here's a list:
http://msdn.microsoft.com/en-us/library/h21280bw.aspx
The following code generates a compiler error about an "unrecognized escape sequence" for each backslash:
string foo = "D:\Projects\Some\Kind\Of\Pathproblem\wuhoo.xml";
I guess I need to escape backslash? How do I do that?
You can either use a double backslash each time
string foo = "D:\\Projects\\Some\\Kind\\Of\\Pathproblem\\wuhoo.xml";
or use the # symbol
string foo = #"D:\Projects\Some\Kind\Of\Pathproblem\wuhoo.xml";
Try this:
string foo = #"D:\Projects\Some\Kind\Of\Pathproblem\wuhoo.xml";
The problem is that in a string, a \ is an escape character. By using the # sign you tell the compiler to ignore the escape characters.
You can also get by with escaping the \:
string foo = "D:\\Projects\\Some\\Kind\\Of\\Pathproblem\\wuhoo.xml";
var foo = #"D:\Projects\Some\Kind\Of\Pathproblem\wuhoo.xml";
If your string is a file path, as in your example, you can also use Unix style file paths:
string foo = "D:/Projects/Some/Kind/Of/Pathproblem/wuhoo.xml";
But the other answers have the more general solutions to string escaping in C#.
string foo = "D:\\Projects\\Some\\Kind\\Of\\Pathproblem\\wuhoo.xml";
This will work, or the previous examples will, too. #"..." means treat everything between the quote marks literally, so you can do
#"Hello
world"
To include a literal newline. I'm more old school and prefer to escape "\" with "\\"