DataSource and Interfaces

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  • John Richardson
    #1

    DataSource and Interfaces

    This is probably a yes/no answer...

    I have a datasource for a combobox, and my datasource is an IList. This
    list may be composed of two class types, but all implement an INavItem
    interface consisting of an ID, and Display field.

    Can I specify an interface for the Display/ValueMember fields? I can't seem
    to add "INavItem.Displ ay" for the DisplayMember - doesn't work.
    How does DisplayMember work through reflection to retrieve the display
    values?

    Thanks.


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    • Franky
      #2
      Re: DataSource and Interfaces

      have you tried to just set "Display" as the DisplayMember. when you
      should use a datatable you have to use the columnname as displaymember
      and not datarow.columnn ame

      gtz,
      Dries

      John Richardson wrote:[color=blue]
      > This is probably a yes/no answer...
      >
      > I have a datasource for a combobox, and my datasource is an IList. This
      > list may be composed of two class types, but all implement an INavItem
      > interface consisting of an ID, and Display field.
      >
      > Can I specify an interface for the Display/ValueMember fields? I can't seem
      > to add "INavItem.Displ ay" for the DisplayMember - doesn't work.
      > How does DisplayMember work through reflection to retrieve the display
      > values?
      >
      > Thanks.
      >
      >[/color]

        Comment

        • John Richardson
          #3
          Re: DataSource and Interfaces

          it's an IList of type ArrayList, and I have two types of custom classes. I
          think the answer is no on this one. :)

          It doesn't matter... I ditched the DataSource binding technique anyways due
          to serious gimpiness on the part of the combobox control (ie: the .Text
          property not matching the display when the Display is not an item in the
          list!!!), and opted for a manual insertion of items to the .Items
          collection. It seems that every time I try to save time with databinding, I
          get burned. It's really not much of a time saver when you factor in
          debugging.



          "Franky" <dries@bestopia .be> wrote in message
          news:1134511943 .508898@seven.k ulnet.kuleuven. ac.be...[color=blue]
          > have you tried to just set "Display" as the DisplayMember. when you should
          > use a datatable you have to use the columnname as displaymember and not
          > datarow.columnn ame
          >
          > gtz,
          > Dries
          >
          > John Richardson wrote:[color=green]
          >> This is probably a yes/no answer...
          >>
          >> I have a datasource for a combobox, and my datasource is an IList. This
          >> list may be composed of two class types, but all implement an INavItem
          >> interface consisting of an ID, and Display field.
          >>
          >> Can I specify an interface for the Display/ValueMember fields? I can't
          >> seem to add "INavItem.Displ ay" for the DisplayMember - doesn't work.
          >> How does DisplayMember work through reflection to retrieve the display
          >> values?
          >>
          >> Thanks.[/color][/color]


            Comment

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