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====== String.Format ======

This static method of the [[https://docs.microsoft.com/en-us/dotnet/api/system.string|System.String]] class is very, very useful.

It permits you to insert values into a string, like in this sample:
<code>cString := String.Format( "Today is {0}", DateTime.Now:ToShortDateString() )</code>.

You can also control the formatting:
<code>cString := String.Format( "It is now {0:d} at {0:t}", DateTime.Now )</code>

For more details please see the Microsoft documentation: [[https://docs.microsoft.com/en-us/dotnet/api/system.string.format#Starting|Get started with the String.Format method]]

Here are a few samples:
<code>String.Format( "'{0,10}'", 100 ) -> '       100'
String.Format( "'{0,-10}'", 100 ) -> '100       '
String.Format( "{0:0000000}", 1234 ) -> 0001234
String.Format( "{0:0000}", 1234 ) -> 1234
String.Format( "'{0,10}'", 1234 ) -> '      1234'
String.Format( "'{0,4}'", 1234 ) -> '1234'
nValue:ToString( "10" ) -> 11234 
nValue:ToString( "4" ) -> 4
String.Format( "{0:yyyy.MM.dd HH:mm:ss}", DateTime.Now ) -> 2019.07.30 11:49:36

nDecimal := 123456789.987654321m
String.Format( "{0}", nDecimal )  -> 123456789,987654321
nDecimal:ToString( "############.##" ) -> 123456789,99
nDecimal:ToString( "############.#######" ) -> 123456789,9876543
nDecimal:ToString( "#.##" ) -> 123456789,99

nValue := 123
nValue:ToString( "0000" ) ) -> 0123
nValue:ToString( "####" ) ) -> 123
String.Format( "'{0,4}'", 123 ) -> ' 123'</code>