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hold class instances in vb.net 2003

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  • E Offline
    E Offline
    ESTAN
    wrote on last edited by
    #1

    Hello, Small question, but it's given me nightmares at the moment. Can I hold class instances in a collection, lets say arraylist? sample code that doesn't work Dim ClasseInstance = New Classe(parametros) ' Add the instance to the arraylist InstanceHolder.Add(ClasseInstance) it's dashing the following error when i try to add the ClasseInstance to the arraylist: Object reference not set to an instance of an object. Can someone help me out with what i missed. Thanks

    C 1 Reply Last reply
    0
    • E ESTAN

      Hello, Small question, but it's given me nightmares at the moment. Can I hold class instances in a collection, lets say arraylist? sample code that doesn't work Dim ClasseInstance = New Classe(parametros) ' Add the instance to the arraylist InstanceHolder.Add(ClasseInstance) it's dashing the following error when i try to add the ClasseInstance to the arraylist: Object reference not set to an instance of an object. Can someone help me out with what i missed. Thanks

      C Offline
      C Offline
      Christian Graus
      wrote on last edited by
      #2

      This error probably means that InstanceHolder is null.

      Christian Graus - Microsoft MVP - C++ "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

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      • C Christian Graus

        This error probably means that InstanceHolder is null.

        Christian Graus - Microsoft MVP - C++ "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

        E Offline
        E Offline
        ESTAN
        wrote on last edited by
        #3

        Thanks a lot. I feel foolish :-) I had this on top Private InstanceHolder As ArrayList instead of Private InstanceHolder As New ArrayList

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