How to insert newline in string literal?
C#.NetLine BreaksC# Problem Overview
In .NET I can provide both \r
or \n
string literals, but there is a way to insert
something like "new line" special character like Environment.NewLine
static property?
C# Solutions
Solution 1 - C#
Well, simple options are:
-
string.Format
:string x = string.Format("first line{0}second line", Environment.NewLine);
-
String concatenation:
string x = "first line" + Environment.NewLine + "second line";
-
String interpolation (in C#6 and above):
string x = $"first line{Environment.NewLine}second line";
You could also use \n everywhere, and replace:
string x = "first line\nsecond line\nthird line".Replace("\n",
Environment.NewLine);
Note that you can't make this a string constant, because the value of Environment.NewLine
will only be available at execution time.
Solution 2 - C#
If you want a const string that contains Environment.NewLine in it you can do something like this:
const string stringWithNewLine =
@"first line
second line
third line";
EDIT
Since this is in a const string it is done in compile time therefore it is the compiler's interpretation of a newline. I can't seem to find a reference explaining this behavior but, I can prove it works as intended. I compiled this code on both Windows and Ubuntu (with Mono) then disassembled and these are the results:
As you can see, in Windows newlines are interpreted as \r\n and on Ubuntu as \n
Solution 3 - C#
var sb = new StringBuilder();
sb.Append(first);
sb.AppendLine(); // which is equal to Append(Environment.NewLine);
sb.Append(second);
return sb.ToString();
Solution 4 - C#
One more way of convenient placement of Environment.NewLine in format string. The idea is to create string extension method that formats string as usual but also replaces {nl} in text with Environment.NewLine
Usage
" X={0} {nl} Y={1}{nl} X+Y={2}".FormatIt(1, 2, 1+2);
gives:
X=1
Y=2
X+Y=3
Code
///<summary>
/// Use "string".FormatIt(...) instead of string.Format("string, ...)
/// Use {nl} in text to insert Environment.NewLine
///</summary>
///<exception cref="ArgumentNullException">If format is null</exception>
[StringFormatMethod("format")]
public static string FormatIt(this string format, params object[] args)
{
if (format == null) throw new ArgumentNullException("format");
return string.Format(format.Replace("{nl}", Environment.NewLine), args);
}
Note
-
If you want ReSharper to highlight your parameters, add attribute to the method above
[StringFormatMethod("format")]
-
This implementation is obviously less efficient than just String.Format
-
Maybe one, who interested in this question would be interested in the next question too: https://stackoverflow.com/questions/159017/named-string-formatting-in-c-sharp
Solution 5 - C#
string myText =
@"<div class=""firstLine""></div>
<div class=""secondLine""></div>
<div class=""thirdLine""></div>";
> that's not it:
string myText =
@"<div class=\"firstLine\"></div>
<div class=\"secondLine\"></div>
<div class=\"thirdLine\"></div>";
Solution 6 - C#
If you really want the New Line string as a constant, then you can do this:
public readonly string myVar = Environment.NewLine;
The user of the readonly keyword in C# means that this variable can only be assigned to once. You can find the documentation on it here. It allows the declaration of a constant variable whose value isn't known until execution time.
Solution 7 - C#
static class MyClass
{
public const string NewLine="\n";
}
string x = "first line" + MyClass.NewLine + "second line"
Solution 8 - C#
newer .net versions allow you to use $ in front of the literal which allows you to use variables inside like follows:
var x = $"Line 1{Environment.NewLine}Line 2{Environment.NewLine}Line 3";
Solution 9 - C#
If you are working with Web application you can try this.
StringBuilder sb = new StringBuilder();
sb.AppendLine("Some text with line one");
sb.AppendLine("Some mpre text with line two");
MyLabel.Text = sb.ToString().Replace(Environment.NewLine, "<br />")
Solution 10 - C#
I like more the "pythonic way"
List<string> lines = new List<string> {
"line1",
"line2",
String.Format("{0} - {1} | {2}",
someVar,
othervar,
thirdVar
)
};
if(foo)
lines.Add("line3");
return String.Join(Environment.NewLine, lines);
Solution 11 - C#
If I understand the question: Couple "\r\n"
to get that new line below in a textbox
. My example worked -
string s1 = comboBox1.Text; // s1 is the variable assigned to box 1, etc.
string s2 = comboBox2.Text;
string both = s1 + "\r\n" + s2;
textBox1.Text = both;
A typical answer could be s1
s2
in the text box
using defined type style.
Solution 12 - C#
Here, Environment.NewLine doesn't worked.
I put a "<br/>" in a string and worked.
Ex: > ltrYourLiteral.Text = "First line.<br/>Second Line.";