Cast a Double Variable to Decimal

Question

How does one cast a double to decimal which is used when doing currency development  Where does the M go  decimal dtot    decimal  doubleTotal

User · Answer

You can cast a double to a decimal like this, without needing the M literal suffix:

double dbl = 1.2345D;
decimal dec = (decimal) dbl;

You should use the M when declaring a new literal decimal value:

decimal dec = 123.45M;

(Without the M, 123.45 is treated as a double and will not compile.)

User · Answer

You only use the M for a numeric literal  when you cast it s just   decimal dtot    decimal doubleTotal    Note that a floating point number is not suited to keep an exact value  so if you first add numbers together and then convert to Decimal you may get rounding errors  You may want to convert the numbers to Decimal before adding them together  or make sure that the numbers aren t floating point numbers in the first place

User · Answer

Well this is an old question and I indeed made use of some of the answers shown here  Nevertheless  in my particular scenario it was possible that the double value that I wanted to convert to decimal was often bigger than decimal MaxValue  So  instead of handling exceptions I wrote this extension method       public static decimal ToDecimal this double  double    gt            double  gt   double  decimal MaxValue   decimal MaxValue    decimal   double    The above approach works if you do not want to bother handling overflow exceptions and if such a thing happen you want just to keep the max possible value my case   but I am aware that for many other scenarios this would not be the expected behavior and may be the exception handling will be needed

User · Answer

use default convertation class  Convert ToDecimal Double

User · Answer

Convert ToDecimal the double you are trying to convert

[c#] Cast a Double Variable to Decimal

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