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convert String to Decimal

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  • P Pete OHanlon

    Just a minor point - in numeric terms, 1120.00120000 is exactly the same as 1120.0012. If you're doing a calculation using a decimal then it doesn't make much sense to round trim it.

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    AspDotNetDev
    wrote on last edited by
    #8

    Indeed, though there is a difference in some situations, such as when using ToString(). Try running this:

    string strD = "192.0205000";
    Decimal D = Decimal.Parse(strD);
    MessageBox.Show(D.ToString());
    // Outputs: 192.0205000

    I never knew that the Decimal data type actually maintains the trailing zeroes. :doh:

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    • J jojoba2011

      Hi codeproject World ! How can i convert string to decimal and remove unused Zero . example : string decimal = "192.0205000"; Decimal D = Decimal.Parse(decimal); and wanna to have : D = 192.0205 NOT D= 192.0205000 PLZ HELP !

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      AspDotNetDev
      wrote on last edited by
      #9

      Excellent question! And thanks for providing the answer. I had no idea the Decimal data type stores trailing zeroes.

      jojoba2011 wrote:

      PLZ HELP !

      Just a bit of friendly advice... avoid using uppercase when not necessary, don't beg for help, and don't shorten words (e.g., "PLZ") except for common acronyms. To many people here at Code Project, it appears unprofessional. Other than that, though, great question. :thumbsup: EDIT: It appears your answer is incorrect.

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      modified on Thursday, April 29, 2010 1:21 AM

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      • P PIEBALDconsult

        JYIS, they aren't there! They don't exist! Edit: I posted that before I saw that you were using Decimal rather than Double. ToString: " The return value is formatted with the general numeric format specifier ("G"), and the NumberFormatInfo object for the current culture. " G: " The exception to the preceding rule is if the number is a Decimal and the precision specifier is omitted. In that case, fixed-point notation is always used and trailing zeroes are preserved. "

        modified on Wednesday, April 28, 2010 9:38 PM

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        AspDotNetDev
        wrote on last edited by
        #10

        PIEBALDconsult wrote:

        JYIS

        What does that mean?

        PIEBALDconsult wrote:

        they aren't there! They don't exist!

        The trailing zeroes? Yes they do. See here.

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        • J jojoba2011
          decimal d=  decimal.Parse("1120.00120000",System.Globalization.NumberStyles.AllowDecimalPoint);
          
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          PIEBALDconsult
          wrote on last edited by
          #11

          I see no difference.

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          • J jojoba2011

            Hi codeproject World ! How can i convert string to decimal and remove unused Zero . example : string decimal = "192.0205000"; Decimal D = Decimal.Parse(decimal); and wanna to have : D = 192.0205 NOT D= 192.0205000 PLZ HELP !

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            PIEBALDconsult
            wrote on last edited by
            #12

            This is merely a quirk of the "G" format; when ToStringing a Decimal, use something along the lines of d.ToString ( "#.###############" ).

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            • J jojoba2011

              Hi codeproject World ! How can i convert string to decimal and remove unused Zero . example : string decimal = "192.0205000"; Decimal D = Decimal.Parse(decimal); and wanna to have : D = 192.0205 NOT D= 192.0205000 PLZ HELP !

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              Ice_Freez05
              wrote on last edited by
              #13

              hello there... try this link...http://www.csharp-examples.net/string-format-double/[^] hope this help...

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              • P PIEBALDconsult

                This is merely a quirk of the "G" format; when ToStringing a Decimal, use something along the lines of d.ToString ( "#.###############" ).

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                AspDotNetDev
                wrote on last edited by
                #14

                Good call. One can also use:

                d.ToString("G29");

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                • A AspDotNetDev

                  Good call. One can also use:

                  d.ToString("G29");

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                  PIEBALDconsult
                  wrote on last edited by
                  #15

                  That's basically what the default is and I don't think it works.

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                  • P PIEBALDconsult

                    That's basically what the default is and I don't think it works.

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                    AspDotNetDev
                    wrote on last edited by
                    #16

                    Worked for me.

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                    • J jojoba2011

                      Hi codeproject World ! How can i convert string to decimal and remove unused Zero . example : string decimal = "192.0205000"; Decimal D = Decimal.Parse(decimal); and wanna to have : D = 192.0205 NOT D= 192.0205000 PLZ HELP !

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                      AspDotNetDev
                      wrote on last edited by
                      #17

                      After reading what everybody has said, I think you want this:

                      Decimal d = Decimal.Parse(Decimal.Parse("192.0205000").ToString("G29"));

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