Strange behaviour with decimal treated as strings

Question

1.00/5 (1 vote)

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I'm getting crazy about this! I can't explain why the output of the code below is not

0
0
0

but it's instead:

0,0000000000
0,0000
0,0

I can't see how the ".ToString()" applied to a decimal value can make reference to the parameter string used to build the decimal value.

Any help is greatly appreciated!

(Edit) to better clarify: what I'm asking is how it's possible that .ToStrings() gives 3 different results even if the decimal number to which it is applied is the same (0 in all three cases).

class Program
{
   static void Main(string[] args)
   {
      Variant V;         
      V = new Variant("0,0000000000"); 
      Console.WriteLine(((decimal)V.value).ToString());  
      
      V = new Variant("0,0000");       
      Console.WriteLine(((decimal)V.value).ToString());  
      
      V = new Variant("0,0");          
      Console.WriteLine(((decimal)V.value).ToString());  
      
      Console.ReadLine();       
   }
}

public class Variant
{
   public object value;

   public Variant(string s)
   {
         decimal d;
         decimal.TryParse(s,out d);
         value = d;
   }
}

Posted 30-Dec-11 0:08am

Antonino Porcino

Updated 30-Dec-11 0:23am

v3

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Comments

Sergey Alexandrovich Kryukov 30-Dec-11 10:39am

Why? why?! Why this strange class Variant? Do you think you will be able to create a "universal numeric" type and operations for it? Wrong idea.
--SA

Antonino Porcino 30-Dec-11 10:56am

Please consider it as an example as it's an extract of a much bigger project. My question actually is: why does (decimal).ToString() give a strange "0,00000" instead of "0". Can you explain why?

2 solutions

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Manish.Insan · Answer 1 · 2011-12-30T00:11:00

Solution 1

just write in this way :

C#

Console.WriteLine(((decimal)V.value).ToString("0.00"));

Hope this will help you.
Don't forget to mark as answer if it helps. :)

Posted 30-Dec-11 0:11am

Manish.Insan

Comments

Antonino Porcino 30-Dec-11 10:57am

Sorry if I was not clear, I didn't ask how to output "0", I actually want to know why (decimal).ToString() gives "0,00000" instead of "0".

Sarvesh Kumar Gupta · Answer 2 · 2011-12-30T00:17:00

Solution 2

C#

please try this

class Program
{
   static void Main(string[] args)
   {
      Variant V;
      V = new Variant("0,0000000000");
      Console.WriteLine(((decimal)V.value).ToString("0"));

      V = new Variant("0,0000");
      Console.WriteLine(((decimal)V.value).ToString("0"));

      V = new Variant("0,0");
      Console.WriteLine(((decimal)V.value).ToString("0"));

      Console.ReadLine();
   }
}

Posted 30-Dec-11 0:17am

Sarvesh Kumar Gupta

Comments

Antonino Porcino 30-Dec-11 10:58am

Sorry if I was not clear, I didn't ask how to output "0", I actually want to know why (decimal).ToString() gives "0,00000" instead of "0". I just can't figure out why.