Format a double in a string and keeping the decimal point

Question

In C#, using the double number 191.5 (example), I want to create a string that:

• has exactly 10 characters
• filled with 0 to the left
• includes the dot character (.)
• include exactly 1 decimal

My code :

strOut += SubString(10, string.Format("{0:0000000000}", 191.5));

The problem with my code is that :

• it rounds (I don't want that)
• it wipes the decimal

My code output :

0000000192

The output I need :

00000191.5

Answer 1

This works just fine, don't need the substring.

var results = string.Format("{0:00000000.0}", 191.5));

Answer 2

I believe

strOut += SubString(10, string.Format("{0:00000000.0}", 191.5));

does what you want. However, you don't really need the substring in this case unless you are sometimes expecting some much larger numbers and want to truncate them.

Answer 3

try this one

double num=192.5; 
strOut += SubString(10, string.Format("{0:#}", num));