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Facepalm of the day.

Scheduled Pinned Locked Moved The Weird and The Wonderful
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  • Richard DeemingR Richard Deeming

    Jörgen Andersson wrote:

    But since it didn't throw an exception but rather make a correct conversion

    What version of .NET? I've just tried Convert.ToInt32("42.") in LINQPad for 3.5 and 4.5, and both versions throw a FormatException.


    "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

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    Jorgen Andersson
    wrote on last edited by
    #15

    4.5

    Wrong is evil and must be defeated. - Jeff Ello[^]

    Richard DeemingR 1 Reply Last reply
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    • J Jorgen Andersson

      4.5

      Wrong is evil and must be defeated. - Jeff Ello[^]

      Richard DeemingR Offline
      Richard DeemingR Offline
      Richard Deeming
      wrote on last edited by
      #16

      Weird. If I try Convert.ToInt32("42.") in .NET 4.5, I get: FormatException: Input string was not in a correct format. Are you sure you're not doing something else in your code that's hiding the error?


      "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

      "These people looked deep within my soul and assigned me a number based on the order in which I joined" - Homer

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      • Richard DeemingR Richard Deeming

        Weird. If I try Convert.ToInt32("42.") in .NET 4.5, I get: FormatException: Input string was not in a correct format. Are you sure you're not doing something else in your code that's hiding the error?


        "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

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        Jorgen Andersson
        wrote on last edited by
        #17

        Odd, I'have to check on monday when I'm back at work.

        Wrong is evil and must be defeated. - Jeff Ello[^]

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        • Richard DeemingR Richard Deeming

          Weird. If I try Convert.ToInt32("42.") in .NET 4.5, I get: FormatException: Input string was not in a correct format. Are you sure you're not doing something else in your code that's hiding the error?


          "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

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          Robert Rohde
          wrote on last edited by
          #18

          Jörgen Andersson (is this you "Neo"?!?) sounds scandinavian and they probably have a different decimal separator... Robert

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          • R Robert Rohde

            Jörgen Andersson (is this you "Neo"?!?) sounds scandinavian and they probably have a different decimal separator... Robert

            Richard DeemingR Offline
            Richard DeemingR Offline
            Richard Deeming
            wrote on last edited by
            #19

            Good point. However, Convert.ToInt32("42,") still produces a FormatException. Trying "42." with the "sv-SE" culture, which uses "," as the decimal separator and "." as the group separator, also produces a FormatException.


            "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

            "These people looked deep within my soul and assigned me a number based on the order in which I joined" - Homer

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            • J Jorgen Andersson

              So I was building an application that presents a list of files matched with info in a database. Everything was working fine and dandy but horrendously slow. I quickly found the culprit to be in this function:

              Func GetIDPart_Of_FileName = FileName => Convert.ToInt32(FileName.Substring(FileName.IndexOf('_') + 1, FileName.IndexOf('.') - FileName.IndexOf('_')));

              The files are built in the form of ID_AnotherID.Extension and what I wanted was AnotherID Can anyone see what I did wrong? :) Do note that it was giving correct results. fixed typo

              Wrong is evil and must be defeated. - Jeff Ello[^]

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              Omar Gameel Salem
              wrote on last edited by
              #20

              hmm FileName.IndexOf('_') is calculated twice too

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              • J Jorgen Andersson

                So I was building an application that presents a list of files matched with info in a database. Everything was working fine and dandy but horrendously slow. I quickly found the culprit to be in this function:

                Func GetIDPart_Of_FileName = FileName => Convert.ToInt32(FileName.Substring(FileName.IndexOf('_') + 1, FileName.IndexOf('.') - FileName.IndexOf('_')));

                The files are built in the form of ID_AnotherID.Extension and what I wanted was AnotherID Can anyone see what I did wrong? :) Do note that it was giving correct results. fixed typo

                Wrong is evil and must be defeated. - Jeff Ello[^]

                M Offline
                M Offline
                Marc Clifton
                wrote on last edited by
                #21

                Well, a little late to the party, but this is why I have a whole bunch of string extensions, like this "Between" and "ToInt32": FileName.Between('_', '.').ToInt32() And then you would never have included the '.' by accident. ;) Marc

                Imperative to Functional Programming Succinctly Higher Order Programming

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                • M Marc Clifton

                  Well, a little late to the party, but this is why I have a whole bunch of string extensions, like this "Between" and "ToInt32": FileName.Between('_', '.').ToInt32() And then you would never have included the '.' by accident. ;) Marc

                  Imperative to Functional Programming Succinctly Higher Order Programming

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                  Jorgen Andersson
                  wrote on last edited by
                  #22

                  Just put that on my todo list. :thumbsup:

                  Wrong is evil and must be defeated. - Jeff Ello[^]

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                  • J Jorgen Andersson

                    Just put that on my todo list. :thumbsup:

                    Wrong is evil and must be defeated. - Jeff Ello[^]

                    M Offline
                    M Offline
                    Marc Clifton
                    wrote on last edited by
                    #23

                    Send me a direct email and I'll send you the .cs file of my extensions. There's this[^] too. Marc

                    Imperative to Functional Programming Succinctly Higher Order Programming

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                    • M Marc Clifton

                      Well, a little late to the party, but this is why I have a whole bunch of string extensions, like this "Between" and "ToInt32": FileName.Between('_', '.').ToInt32() And then you would never have included the '.' by accident. ;) Marc

                      Imperative to Functional Programming Succinctly Higher Order Programming

                      G Offline
                      G Offline
                      Garth J Lancaster
                      wrote on last edited by
                      #24

                      very cool (aka :cool: ) 'g'

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