How do I show numbers with 5 fixed digits with leading zeroes
int _num1 = 123;
int _num2 = 45;
int _num3 = 123456;
String.Format("{0:00000}", _num1); //"00123"
String.Format("{0:00000}", _num2); //"00045"
String.Format("{0:00000}", _num3); //"123456"
String.Format("{0:d5}", _num1); //"00123"
String.Format("{0:d5}", _num2); //"00045"
String.Format("{0:d5}", _num3); //"123456"
Can I substitute a string for a value? Yes:
String.Format("{0:yes;;no}", value)
This will print “no” if value is 0, “yes” if value is 1.
What’s the most efficient way to convert a type into a string?
Ans:
double testDouble = 19.95;
String testString1 = String.Format("{0:C}", testDouble); // Boxing operation required.
String testString2 = testDouble.ToString(”C”); // No boxing operation required.
How can I format as percentage without having the number multiplied by 100?
Put a single quote (’) before the % in the format string.
myString.Format("{0:##.00′%", 1.23);
This will yield “1.23%”.
Can I convert a number with a thousand separator to an int?
Ans: Yes - no matter what thousand separator is in use for your locale.
int x = int.Parse("1,345"); // fails int x = int.Parse("1,345",System.Globalization.NumberStyles.AllowThousands)
This gives you an x of 1345.
How can I use curly brackets within a formatted number?
Ans: Yes - doubling them escapes them.
For example:
string.format("{{SomeString}}={0}","Hello");
will produce: “{SomeString}=Hellow”
How can I convert from currency back to a number?
Ans: You can add the bitmapped values of the Globalization.NumberStyles enumeration. // format double to currency
str = string.Format("{0:c}", pmt); // parse currency formatted string to double
double.Parse(str, Globalization.NumberStyles.AllowCurrencySymbol + Globalization.NumberStyles.AllowDecimalPoint + Globalization.NumberStyles.AllowThousands);
What’s a good way to format currency?
double val = 4219.6; str = string.Format("{0:$#,#.00;Call Us;Call Us}", val);
This will return “$4,219.60”. The .00 will force 2 decimals and the “;Call Us;Call Us” to show the text “Call Us” in place of negative and null values respectively. (Just in case)
How do I format an integer, with commas for thousands?
string str = string.Format("{0:#,0}", intValue);
How can I format a phone number to look like 800.555.1212?
There’s no direct way to do this; however you can get dashes in the output.
So you can do this:
string tempStr = String.Format(”{0:###-###-####}”, 8005551212); string result =tempStr.Replace(’-',’.');