Strings

Various Strings Tips

String.Format

String.Format is one option to insert the value of an object, variable, or expression into another string. For example, you can insert the value of a Decimal value into a string to display it to the user as a single string:

String.Format("The current price is {0} per ounce.",pricePerOunce);

And you can control that value's formatting:

String.Format("The current price is {0:C2} per ounce.", pricePerOunce);
// Result if current culture is en-US: "The current price is $17.36 per ounce."

$ String Interpolation

The $ special character identifies a string literal as an interpolated string.

Console.WriteLine($"Hello, {name}! Today is {date.DayOfWeek}, it's {date:HH:mm} now.");

The syntax is as follows:

{<interpolationExpression>[,<alignment>][:<formatSpecifier>]}

Like for example:

Console.WriteLine($"|{"Left",-7}|{"Right",7}|");
string name = "Horace";
int age = 34;
// use {{ }} to generate { } in string.
Console.WriteLine($"He asked, \"Is your name {name}?\", but didn't wait for a reply :-{{"); 
Console.WriteLine($"{name} is {age} year{(age == 1 ? "" : "s")} old.");
// Expected output is:
// He asked, "Is your name Horace?", but didn't wait for a reply :-{
// Horace is 34 years old.

Number Format Specifiers:

Specifier	Description	Example
d D f F g G ...	date (full list)	Thursday, 10 April 2008 06:30
C	currency
D	decimal
E	fixed-point (float)
G	general
P	percentage
X x	hexadecimal

Formatting numbers

In formatting numbers you can use 0 as a mandatory place and # as an optional place:

// just two decimal places
float temp = 123.4567;
Console.WriteLine($"{temp:0.##}");      // "123.46"
Console.WriteLine($"{temp:0.0#}");      // "123.41"
Console.WriteLine($"{temp:0.0}");       // "123.4"

Newline

You can add a new line with

result.text=$"This is a {Environment.NewLine} comment!";