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Change the digits after the decimal point.

Posted on 2011-09-27
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Last Modified: 2012-05-12

I have a "Price" field that contains values like : 50.22, 8.78, 68.19, etc.

I want the last 2 digits after the decimal point to be rounded like this :

If :  .01 to .29  =  .29

If :  .30 to .49  =  .49

If :  .50 to .79  =  .79

If :  .79 to .99  =  .95

So if Price is "29.14", it would be "29.29", . . . "18.78" would be "18.99", etc.  thanks

How can I do this in C#?   thanks.
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Question by:MikeMCSD
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3 Comments
 
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Expert Comment

by:Slimfinger
ID: 36712699
There may be a slicker way to do this, but it's simple enough like this:

decimal valOriginal = 19.77m;
decimal valLeft = ((double)((int)valOriginal);
decimal valRight = valOriginal - valLeft;

decimal valOutput = valLeft +
   (valRight < 0.30m ? 0.29m :
   (valRight < 0.50m ? 0.49m :
   (valRight < 0.80m ? 0.79m : 0.95m)));
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Author Comment

by:MikeMCSD
ID: 36712898
thanks slim . .  

Here is it using SQL :

                        SET Price =
                        CASE WHEN Price-floor(Price) >= 0.70 THEN floor(Price) + 0.95 ELSE
                        CASE WHEN Price-floor(Price) >= 0.50 THEN floor(Price) + 0.69 ELSE
                        CASE WHEN Price-floor(Price) >= 0.30 THEN floor(Price) + 0.49 ELSE
                        CASE WHEN Price-floor(Price) >= 0 THEN floor(Price) + 0.29
                        END END END END


Is there a similar function for "floor" in C#?  I can't remember what floor does anyway.

I would like to use a similar format like this because it's easier to understand.

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Accepted Solution

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Slimfinger earned 500 total points
ID: 36712947
They are implemented in the System.Math class.

I believe they typically do this:

floor(2.77) = 2.0
ceiling(2.77) = 3.0

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