double to string and string format

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a double number has tihs value: 219.67377380133897

I've tried to change it to string using format strings:

number.ToString("###0.0###############") = 251.673773801339 > (897) changed by 9
&
number.Tostring("F16") = 219.673773801339000 > (897) changed by 9

Any way to solve this??

Posted 26-Feb-13 3:54am

faneleo

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ZurdoDev 26-Feb-13 9:59am

Have you tried just .ToString()?

faneleo 26-Feb-13 10:18am

.ToString() doesn't work on all situations, until now this is the only problem I have using string formats.

Sergey Alexandrovich Kryukov 26-Feb-13 14:57pm

Where do you think ToString(string) won't work?
—SA

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Alan N · Accepted Answer · 2013-02-26T04:38:00

Solution 1

A Double value has up to 15 decimal digits of precision, although a maximum of 17 digits is maintained internally, Double structure[^].

As you have found out, many of the format specifiers will only access 15 digits. To see all 17 use the round trip specifier "R" or the general specifier "G17".

Alan.

Posted 26-Feb-13 4:38am

Alan N

Comments

faneleo 26-Feb-13 10:48am

Thanks, it resolved my issue.