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  4. Casting to inhering type from inherited type

Casting to inhering type from inherited type

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  • L livez

    This is what I tried:

    class test : XmlDocument
    {
    public test()
    {

        }
    
        public void testing ()
        {
            test t = new test();
            XmlDocument doc = new XmlDocument();
            t = (test)doc;
        }
    }
    
    L Offline
    L Offline
    leppie
    wrote on last edited by
    #5

    livez wrote:

    XmlDocument doc = new XmlDocument(); t = (test)doc;

    XmlDocument doc = new test();
    test t = (test) doc;

    I am not saying any more.

    xacc.ide - now with TabsToSpaces support
    IronScheme - 1.0 alpha 4a out now (29 May 2008)

    L 1 Reply Last reply
    0
    • J Jan Scamba

      [Message Deleted]

      L Offline
      L Offline
      livez
      wrote on last edited by
      #6

      Didnt work :(

      J 1 Reply Last reply
      0
      • L livez

        Didnt work :(

        J Offline
        J Offline
        Jan Scamba
        wrote on last edited by
        #7

        try leppies solution bellow

        1 Reply Last reply
        0
        • L leppie

          livez wrote:

          XmlDocument doc = new XmlDocument(); t = (test)doc;

          XmlDocument doc = new test();
          test t = (test) doc;

          I am not saying any more.

          xacc.ide - now with TabsToSpaces support
          IronScheme - 1.0 alpha 4a out now (29 May 2008)

          L Offline
          L Offline
          livez
          wrote on last edited by
          #8

          So I can´t cast to a more advanced type, but casting to a less advanced is okay.

          L 1 Reply Last reply
          0
          • L livez

            So I can´t cast to a more advanced type, but casting to a less advanced is okay.

            L Offline
            L Offline
            leppie
            wrote on last edited by
            #9

            I think you need to study inheritance and polymorphism a bit more. It takes a while to get to understand it, but once you do, it all seems natural.

            xacc.ide - now with TabsToSpaces support
            IronScheme - 1.0 alpha 4a out now (29 May 2008)

            L 1 Reply Last reply
            0
            • L leppie

              I think you need to study inheritance and polymorphism a bit more. It takes a while to get to understand it, but once you do, it all seems natural.

              xacc.ide - now with TabsToSpaces support
              IronScheme - 1.0 alpha 4a out now (29 May 2008)

              L Offline
              L Offline
              livez
              wrote on last edited by
              #10

              Thanks for your help, though u could work on your manners a bit.

              L C 2 Replies Last reply
              0
              • L livez

                Thanks for your help, though u could work on your manners a bit.

                L Offline
                L Offline
                leppie
                wrote on last edited by
                #11

                My manners are irrelevant. I do not like to spoon-feed people.

                xacc.ide - now with TabsToSpaces support
                IronScheme - 1.0 alpha 4a out now (29 May 2008)

                C 1 Reply Last reply
                0
                • L leppie

                  My manners are irrelevant. I do not like to spoon-feed people.

                  xacc.ide - now with TabsToSpaces support
                  IronScheme - 1.0 alpha 4a out now (29 May 2008)

                  C Offline
                  C Offline
                  Colin Angus Mackay
                  wrote on last edited by
                  #12

                  leppie wrote:

                  My manners are irrelevant.

                  Well said, Seven! :-D

                  Recent blog posts: * Introduction to LINQ to XML (Part 1) - (Part 2) - (part 3) My website | Blog

                  L 1 Reply Last reply
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                  • L livez

                    Thanks for your help, though u could work on your manners a bit.

                    C Offline
                    C Offline
                    Colin Angus Mackay
                    wrote on last edited by
                    #13

                    livez wrote:

                    work on your manners a bit

                    His responses appeared to be quite polite. Curt, for sure, but polite.

                    Recent blog posts: * Introduction to LINQ to XML (Part 1) - (Part 2) - (part 3) My website | Blog

                    L 1 Reply Last reply
                    0
                    • J Jan Scamba

                      [Message Deleted]

                      S Offline
                      S Offline
                      Scott Dorman
                      wrote on last edited by
                      #14

                      Why was the message deleted? Because the OP said the proposed solution didn't work? That's not a very good reason as now no one else who runs into the same (or similar) problem will know not to try that approach.

                      Scott. —In just two days, tomorrow will be yesterday. —Hey, hey, hey. Don't be mean. We don't have to be mean because, remember, no matter where you go, there you are. - Buckaroo Banzai


                      [Forum Guidelines] [Articles] [Blog]

                      1 Reply Last reply
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                      • C Colin Angus Mackay

                        leppie wrote:

                        My manners are irrelevant.

                        Well said, Seven! :-D

                        Recent blog posts: * Introduction to LINQ to XML (Part 1) - (Part 2) - (part 3) My website | Blog

                        L Offline
                        L Offline
                        leppie
                        wrote on last edited by
                        #15

                        :)

                        xacc.ide - now with TabsToSpaces support
                        IronScheme - 1.0 alpha 4a out now (29 May 2008)

                        1 Reply Last reply
                        0
                        • C Colin Angus Mackay

                          livez wrote:

                          work on your manners a bit

                          His responses appeared to be quite polite. Curt, for sure, but polite.

                          Recent blog posts: * Introduction to LINQ to XML (Part 1) - (Part 2) - (part 3) My website | Blog

                          L Offline
                          L Offline
                          livez
                          wrote on last edited by
                          #16

                          Yes you´re quite right. My apologies Leppie.

                          1 Reply Last reply
                          0
                          • L livez

                            This is what I tried:

                            class test : XmlDocument
                            {
                            public test()
                            {

                                }
                            
                                public void testing ()
                                {
                                    test t = new test();
                                    XmlDocument doc = new XmlDocument();
                                    t = (test)doc;
                                }
                            }
                            
                            R Offline
                            R Offline
                            Russell Jones
                            wrote on last edited by
                            #17

                            in general these kinds of casts will only work towards the base class. ie a test is an XmlDocument but an XmlDocument is Not necessarily a test. you could use the "as" operator t = doc as test; this will return t == null if doc is not of type test. If you know how to convert an XmlDocument into a test then you could create a cast for it public static explicit operator Test(XmlDocument doc) { //your conversion algorithm here } HTH Russ

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