How to convert a double 2.0 to string "2.0"

[Jianwei Sun]

Hi, guys,

If I simply do a double d = 2.0 ,and then s=d.ToString() , it will trim
the .0 off and return me 2, is there a good way to keep .0 and return me
2.0.

Thanks,

[gdgrant]

Use the formatting optin in the ToString() method:

double d1 = 2.0;
double d2 = 2.01;

Trace.WriteLine( d1.ToString("#,###.0") );
Trace.WriteLine( d1.ToString("#,###.00") );
Trace.WriteLine( d2.ToString("#,###.0") );
Trace.WriteLine( d2.ToString("#,###.00") );
Trace.WriteLine( d2.ToString("#,###.000") );

[Carlos J. Quintero [.NET MVP]]

The ToString method is overloaded and accepts parameters to specify the
format. For example ToString("#.0")

See the docs.

--
Best regards,

Carlos J. Quintero

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"Jianwei Sun" <js***********@gmail.com> escribió en el mensaje
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Hi, guys,

If I simply do a double d = 2.0 ,and then s=d.ToString() , it will trim
the .0 off and return me 2, is there a good way to keep .0 and return me
2.0.

Thanks,