How to escape braces (curly brackets) in a format string in .NET

How can brackets be escaped in using string.Format. For example:

String val = "1,2,3"
String.Format(" foo {{0}}", val); 

This example doesn't throw an exception, but outputs the string foo {0}

Is there a way to escape the brackets?

For you to output foo {1, 2, 3} you have to do something like:

string t = "1, 2, 3";
string v = String.Format(" foo {{{0}}}", t);

To output a { you use {{ and to output a } you use }}.

or Now, you can also use c# string interpolation like this (feature available in C# 6.0)

Escaping Brackets: String Interpolation $(""). it is new feature in C# 6.0

var inVal= "1, 2, 3";
var outVal= $" foo {{{value}}}";
//Output will be:  foo {1, 2, 3}

How to escape braces (curly brackets) in a format string in .NET , For you to output foo {1, 2, 3} you have to do something like: string t = "1, 2, 3"; string v = String.Format(" foo {{{0}}}", t);. To output a { you use  Escaping curly brackets AND using string interpolation makes for an interesting challenge. You need to use quadruple brackets to escape the string interpolation parsing and string.format parsing. Escaping Brackets: String Interpolation $(“”) and String.Format

Yes to output { in string.Format you have to escape it like this {{

So this

String val = "1,2,3";
String.Format(" foo {{{0}}}", val);

will output "foo {1,2,3}".

BUT you have to know about a design bug in C# which is that by going on the above logic you would assume this below code will print {24.00}

int i = 24;
string str = String.Format("{{{0:N}}}", i); //gives '{N}' instead of {24.00}

But this prints {N}. This is because the way C# parses escape sequences and format characters. To get the desired value in the above case you have to use this instead.

String.Format("{0}{1:N}{2}", "{", i, "}") //evaluates to {24.00}

Reference Articles String.Format gottach and String Formatting FAQ

How to escape braces curly brackets in a format string in c# .NET , How can brackets be escaped in using string.Format . For example: String val = "​1,2,3" String.Format(" foo {{0}}", val);. This example doesn't  To output a { you use {{ and to output a } you use }}. Escaping curly brackets AND using string interpolation makes for an interesting challenge. You need to use quadruple brackets to escape the string interpolation parsing and string.format parsing.

Almost there! The escape sequence for a brace is {{ or }} so for your example you would use:

string t = "1, 2, 3";
string v = String.Format(" foo {{{0}}}", t);

C# Language, Format() expression. Example#. string outsidetext = "I am outside of bracket"; string.Format  Escape curly brace '{' in String.Format. c# has a String.Format method that allows you to format a string but inserting params with the tokens {0} {1}. I am trying to create a simple json string which requires curly brackets to be in the string, and so it is breaking the formatter.

You can use double open brackets and double closing brackets which will only show one bracket on your page.

$ - string interpolation, Structure of an interpolated string; Special characters; Implicit syntax to create formatted strings than a string composite formatting feature. For more information, see Escaping Braces. include a brace in a result string and how to use a conditional operator in an interpolation expression: NET article. How to escape braces (curly brackets) in a format string in .NET 2178 How do I get a consistent byte representation of strings in C# without manually specifying an encoding?

Escaping curly brackets AND using string interpolation makes for an interesting challenge. You need to use quadruple brackets to escape the string interpolation parsing and string.format parsing.

Escaping Brackets: String Interpolation $("") and String.Format
string localVar = "dynamic";
string templateString = $@"<h2>{0}</h2><div>this is my {localVar} template using a {{{{custom tag}}}}</div>";
string result = string.Format(templateString, "String Interpolation");

// OUTPUT: <h2>String Interpolation</h2><div>this is my dynamic template using a {custom tag}</div>

c#, How can brackets be escaped in using string.Format . For example: String val = "​1,2,3" String.Format(" foo {{0}}", val);. This example doesn't throw an exception,  How to check whether a string contains a substring in JavaScript? Can I escape a double quote in a verbatim string literal? How do I check if a string contains another string in Objective-C? How to split a string in Java ; Escape curly brace '{' in String.Format

Escaping curly brackets inside a String.Format expression, String Format / Escaping curly brackets inside a String.Format expression / Essential C#. Format expression. string outsidetext = "I am outside of bracket"; string.Format("{{I am in brackets!}} 82 Using json.net. 83 Lambda Expressions. The string.Format function then reads this string to decide if a formatting instruction is to be interpreted, e.g. {0}. Since the \{resulted in {character in the string, the String.Format function could not decide that this is to be taken as a format instruction or as literal {. So, string.Format treats {{as literal {. Analogous }} for }.

Format String Syntax, Format strings contain “replacement fields” surrounded by curly braces {} . If you need to include a brace character in the literal text, it can be escaped by  VB.NET: bracket vs curly bracket. Posted by cmrhm on May 27, The only other place you'll see curly brackets are in string format functions and they're kind of

How to Escape Curly Braces in C#, Actually, that would be necessary for format strings in any .NET language. Reply. Escaping curly brackets #1545. quoting as a plain JS string is the way to do it. Let us know if this poses a problem for you somehow. how can i escape braces

Comments
  • MSDN String Formatting FAQ msdn.microsoft.com/en-us/netframework/aa569608: How do I write out a curly bracket in string formats? Do escaped curly brackets have any odd behaviors I need to be aware of? How can I use string formatting to write out something like "{42.00}"?
  • Unfortunately, the above MSDN link is broken. Currently, the correct link seems to be msdn.microsoft.com/en-us/library/… (seet the QA section at the bottom, or search for "escape" on the page).
  • "{{" is treated as the escaped bracket character in a format string.
  • But if you want to add value formatting to your string specifier you need also to read the answer from Guru Kara below.
  • Read the section Escaping Braces in the official documentation Composite Formatting.
  • It's also working in new C# 6 string interpolation ($"a = {{ {a} }}")
  • More specific on the C# 6 string interpolation way, doubling up on the curly works like so string v = $" foo {{{t}}}";. If you has other characters to escape that's not a curly you can use the $@ combo string v2 = $@"\foo {{{t}}}\";
  • If I ran into that bug, I'd write string.Format( "{{{0}}}", i.ToString("N") ); which may be more readable to some.
  • @Happy It might, but you'd then find yourself specifying the FormatProvider twice, with the risk that you'd specify different ones, or miss one.