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string to int

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  • T tomiga

    How to convert? (varius methods if possible, please)

    T Offline
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    Tom Archer
    wrote on last edited by
    #3

    OOOPS!!!!! I've been in the MFC forum all day and my head is still in that :) Use the Convert static functions to do what you want.

    string s = "42";
    int i = Convert.ToInt32(s);

    Cheers, Tom Archer Author, Inside C# A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the affairs of others.

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    • T Tom Archer

      OOOPS!!!!! I've been in the MFC forum all day and my head is still in that :) Use the Convert static functions to do what you want.

      string s = "42";
      int i = Convert.ToInt32(s);

      Cheers, Tom Archer Author, Inside C# A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the affairs of others.

      E Offline
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      ez2
      wrote on last edited by
      #4

      What's the difference between convert and parse. string s = "42"; int i = int32.parse(s);

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      • E ez2

        What's the difference between convert and parse. string s = "42"; int i = int32.parse(s);

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        Tom Archer
        wrote on last edited by
        #5

        Parse is specific to the Int32 class while Convert is a generic class supporting all types. Cheers, Tom Archer Author, Inside C# A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the affairs of others.

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        • E ez2

          What's the difference between convert and parse. string s = "42"; int i = int32.parse(s);

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          James T Johnson
          wrote on last edited by
          #6

          It should also be noted that in the case of converting a string to an int via the Convert class it calls Int32.Parse. James Simplicity Rules!

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          • J James T Johnson

            It should also be noted that in the case of converting a string to an int via the Convert class it calls Int32.Parse. James Simplicity Rules!

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            Tom Archer
            wrote on last edited by
            #7

            Good point, James. I'm so accustomed to using the Convert class for everything that I never think about Parse. Cheers, Tom Archer Author, Inside C# A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the affairs of others.

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            • T Tom Archer

              Using atoi will work: CString str = "42"; int i = atoi(str); Cheers, Tom Archer Author, Inside C# A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the affairs of others.

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              tomiga
              wrote on last edited by
              #8

              it would be cool ;)

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              • T tomiga

                it would be cool ;)

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                Tom Archer
                wrote on last edited by
                #9

                You might even be able to do this through PInvoke, but I wouldn't necessarily recommend it :) I think I'll stick with "What is Convert?", Alex :laugh: Cheers, Tom Archer Author, Inside C# A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the affairs of others.

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                • T Tom Archer

                  OOOPS!!!!! I've been in the MFC forum all day and my head is still in that :) Use the Convert static functions to do what you want.

                  string s = "42";
                  int i = Convert.ToInt32(s);

                  Cheers, Tom Archer Author, Inside C# A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the affairs of others.

                  T Offline
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                  tomiga
                  wrote on last edited by
                  #10

                  thx... i was looking for this conversion in string class. As I can see there is special class to conversions.

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                  • T tomiga

                    thx... i was looking for this conversion in string class. As I can see there is special class to conversions.

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                    ez2
                    wrote on last edited by
                    #11

                    So I guess my followup question would be when to use one or the other (parse vs. convert). Also, is parse more efficient? Just looking for some guidelines here.

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                    • E ez2

                      So I guess my followup question would be when to use one or the other (parse vs. convert). Also, is parse more efficient? Just looking for some guidelines here.

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                      James T Johnson
                      wrote on last edited by
                      #12

                      Convert can convert from all intrinsic datatypes to the other types; parse only accepts strings. Convert also calls the appropriate parse method when converting a string to that format except when converting UInt32 which isn't CTS compliant and converting string to string where it just returns the value ;P. I would use Convert for consistancy in code, but in some cases, Parse will take a few extra parameters you may wish to use. HTH, James Simplicity Rules!

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