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  4. Exception:System.IndexOutOfRangeException (Urgent)

Exception:System.IndexOutOfRangeException (Urgent)

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  • C chravisankar

    can you tell me what is this? for(int i=0;i indice[i] = TableListBox.CheckedIndices[i];<--Exception

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    Saira Tanwir
    wrote on last edited by
    #4

    sorry about that i copied the incorrect code. the for loop looks like this int count=4; int[] indice = new int[count]; for(int i=0;i<count;i++) { indice[i] = TableListBox.CheckedIndices[i]; } return indice; TableList Box is a CheckedListBox. what this loop does is takes the item on the selected index of the list box and stores it in another array.

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    • S Saira Tanwir

      sorry about that i copied the incorrect code. the for loop looks like this int count=4; int[] indice = new int[count]; for(int i=0;i<count;i++) { indice[i] = TableListBox.CheckedIndices[i]; } return indice; TableList Box is a CheckedListBox. what this loop does is takes the item on the selected index of the list box and stores it in another array.

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      chravisankar
      wrote on last edited by
      #5

      check the size of TableListBox.it should not be greater than count

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      • C chravisankar

        check the size of TableListBox.it should not be greater than count

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        Saira Tanwir
        wrote on last edited by
        #6

        the size property of the listbox just gives its width and height. what has that got to do with the exception??

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        • S Saira Tanwir

          the size property of the listbox just gives its width and height. what has that got to do with the exception??

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          chravisankar
          wrote on last edited by
          #7

          i am not talking about the physical size. i am talking about the count. check during run time.just place a brek point in the for loop and see whether TableList[i] is not greater than TableList[count]. right??

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          • S Saira Tanwir

            sorry about that i copied the incorrect code. the for loop looks like this int count=4; int[] indice = new int[count]; for(int i=0;i<count;i++) { indice[i] = TableListBox.CheckedIndices[i]; } return indice; TableList Box is a CheckedListBox. what this loop does is takes the item on the selected index of the list box and stores it in another array.

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            quiteSmart
            wrote on last edited by
            #8

            I believe that your error is that there is less than 4 checked items in the Table listBox so when the compiler tries to go to (for example) index 4 it is not found and it is out of range. try knowing how many items are checked before you initialize the other array and u do the for loop. you can do this int count = TableListBox.CheckedIndices.Count; and continue the rest of your code

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            • Q quiteSmart

              I believe that your error is that there is less than 4 checked items in the Table listBox so when the compiler tries to go to (for example) index 4 it is not found and it is out of range. try knowing how many items are checked before you initialize the other array and u do the for loop. you can do this int count = TableListBox.CheckedIndices.Count; and continue the rest of your code

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              Saira Tanwir
              wrote on last edited by
              #9

              i've already checked that the number of items selected in the listbox are 4 through int count=TableListBox.CheckedIndices.Count; approach. but still it doesn't work. Any other suggestions???

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              • Q quiteSmart

                int count=4; int[] indice = new int[count]; MessageBox.Show(count.ToString()); for(int i=0;i indice[i] = TableListBox.CheckedIndices[i];<--Exception return indice; this is not C# coding

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                J4amieC
                wrote on last edited by
                #10

                Why do you say that. (NB. the forum cut off everything after "for(int i=0;i" the line should have read "for(int i=0;i<count;i++)")

                --- How to get answers to your questions[^]

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                • J J4amieC

                  Why do you say that. (NB. the forum cut off everything after "for(int i=0;i" the line should have read "for(int i=0;i<count;i++)")

                  --- How to get answers to your questions[^]

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                  quiteSmart
                  wrote on last edited by
                  #11

                  It is a good notice from you X| But i didn't know that the forum cut that out. Why don't u try to help that poor guy instead of loosing your time on unrelavent comments

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                  • S Saira Tanwir

                    i've already checked that the number of items selected in the listbox are 4 through int count=TableListBox.CheckedIndices.Count; approach. but still it doesn't work. Any other suggestions???

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                    quiteSmart
                    wrote on last edited by
                    #12

                    Sorry, i cann't see any error in the code you are providing. Try providing us more information and maybe we can help

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                    • Q quiteSmart

                      Sorry, i cann't see any error in the code you are providing. Try providing us more information and maybe we can help

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                      Saira Tanwir
                      wrote on last edited by
                      #13

                      can this be due to the .Net Platform being corrupt? i'm really confused:confused::~

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                      • S Saira Tanwir

                        can this be due to the .Net Platform being corrupt? i'm really confused:confused::~

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                        quiteSmart
                        wrote on last edited by
                        #14

                        Is it the first time you develop on this Platform?

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                        • S Saira Tanwir

                          can this be due to the .Net Platform being corrupt? i'm really confused:confused::~

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                          Christian Graus
                          wrote on last edited by
                          #15

                          The odds of that are close to zero.

                          Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog

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                          • S Saira Tanwir

                            hi friends can anyone plz guide me on the exception An unhandled exception of type 'System.IndexOutOfRangeException' occurred in system.windows.forms.dll Additional information: Index was outside the bounds of the array. heres the code that gives me the exception int count=4; int[] indice = new int[count]; MessageBox.Show(count.ToString()); for(int i=0;i<--Exception return indice; plz reply quickly

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                            Christian Graus
                            wrote on last edited by
                            #16

                            Saira Tanwir wrote:

                            plz reply quickly

                            This really bugs me. You're getting help for free, people will reply when they reply. No-one is 'on duty' int count=4; int[] indice = new int[count]; MessageBox.Show(count.ToString()); for(int i=0;i

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                            • C Christian Graus

                              The odds of that are close to zero.

                              Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog

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                              Saira Tanwir
                              wrote on last edited by
                              #17

                              thankyou for clearing that up and YES this is my first project on this platform

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                              • C Christian Graus

                                Saira Tanwir wrote:

                                plz reply quickly

                                This really bugs me. You're getting help for free, people will reply when they reply. No-one is 'on duty' int count=4; int[] indice = new int[count]; MessageBox.Show(count.ToString()); for(int i=0;i

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                                Saira Tanwir
                                wrote on last edited by
                                #18

                                well guys the problem is still there:^) But thanks anyway for all thee help and ur precious time regards:rose: Saira

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                                • S Saira Tanwir

                                  well guys the problem is still there:^) But thanks anyway for all thee help and ur precious time regards:rose: Saira

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                                  Christian Graus
                                  wrote on last edited by
                                  #19

                                  Well, it's a really simple one. You need to step through the code and see what's happening, if you need to do that, to be convinced that hard coding the number 4 when the list could have less items is a bad idea. You'll see that it blows up because there are not four items checked. Nothing else makes sense.

                                  Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog

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                                  • S Saira Tanwir

                                    i've already checked that the number of items selected in the listbox are 4 through int count=TableListBox.CheckedIndices.Count; approach. but still it doesn't work. Any other suggestions???

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                                    chravisankar
                                    wrote on last edited by
                                    #20

                                    paste the full code i will test and let u know

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