Properties: Catch 22

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  • pbd22
    #1

    Properties: Catch 22

    Hi. I am caught between 2 errors.

    When I have:

    Public Property Subtitle() As String
    Get
    Return _subTitle
    End Get
    Set(ByVal value As String)
    _subTitle = value
    End Set
    End Property



    I get:

    Error 21 Class 'WebPartBase' must implement 'ReadOnly Property
    Subtitle() As String' for interface
    'System.Web.UI. WebControls.Web Parts.IWebPart' . Implementing property
    must have matching 'ReadOnly' or 'WriteOnly' specifiers.


    And, when I have:

    Public ReadOnly Property Subtitle() As String
    Get
    Return _subTitle
    End Get
    End Property

    Public WriteOnly Property Subtitle() As String
    Set(ByVal value As String)
    _subTitle = Value
    End Set
    End Property



    I get:

    Quote:
    Error 22 'Public ReadOnly Property Subtitle() As String' and 'Public
    WriteOnly Property Subtitle() As String' cannot overload each other
    because they differ only by 'ReadOnly' or 'WriteOnly'.


    help?

    Tags: None
    • Branco Medeiros
      #2
      Re: Properties: Catch 22

      pbd22 wrote:
      <snip>
      When I have:
      >
      Public Property Subtitle() As String
      Get
      Return _subTitle
      End Get
      Set(ByVal value As String)
      _subTitle = value
      End Set
      End Property
      >
      I get:
      >
      Error 21 Class 'WebPartBase' must implement 'ReadOnly Property
      Subtitle() As String' for interface
      'System.Web.UI. WebControls.Web Parts.IWebPart' . Implementing property
      must have matching 'ReadOnly' or 'WriteOnly' specifiers.
      <snip>

      The implementing method doesn't need to be named after the implemented
      one. Therefore, you can have:
      Public Property Subtitle() As String
      Get
      Return _subTitle
      End Get
      Set(ByVal value As String)
      _subTitle = value
      End Set
      End Property
      Private ReadOnly Property IWebPart_SubTit le As String _
      Implements System.Web.UI.W ebControls._
      WebParts.IWebPa rt.SubTitle
      Return Subtitle
      End Property


      HTH.

      Regards,

      Branco

        Comment

        • Pritcham
          #3
          Re: Properties: Catch 22

          On 19 Apr, 00:26, pbd22 <dush...@gmail. comwrote:
          Hi. I am caught between 2 errors.
          >
          When I have:
          >
          Public Property Subtitle() As String
          Get
          Return _subTitle
          End Get
          Set(ByVal value As String)
          _subTitle = value
          End Set
          End Property
          >
          I get:
          >
          Error 21 Class 'WebPartBase' must implement 'ReadOnly Property
          Subtitle() As String' for interface
          'System.Web.UI. WebControls.Web Parts.IWebPart' . Implementing property
          must have matching 'ReadOnly' or 'WriteOnly' specifiers.
          >
          And, when I have:
          >
          Public ReadOnly Property Subtitle() As String
          Get
          Return _subTitle
          End Get
          End Property
          >
          Public WriteOnly Property Subtitle() As String
          Set(ByVal value As String)
          _subTitle = Value
          End Set
          End Property
          >
          I get:
          >
          Quote:
          Error 22 'Public ReadOnly Property Subtitle() As String' and 'Public
          WriteOnly Property Subtitle() As String' cannot overload each other
          because they differ only by 'ReadOnly' or 'WriteOnly'.
          >
          help?
          Hi

          Just for your future reference, the error message you were getting
          tells you all you need to know - i.e.
          The first part ("Error 21 Class 'WebPartBase' must implement 'ReadOnly
          Property
          Subtitle() As String' for interface
          'System.Web.UI. WebControls.Web Parts.IWebPart' . "

          is telling you that you need to implement the ReadOnly Property
          SubTitle().

          The second part ("Implementi ng property must have matching 'ReadOnly'
          or 'WriteOnly' specifiers.") is a more generic message telling you
          that you have a mismatched property so you need to match it.

          Hope that helps
          Martin

            Comment

            • Chris Dunaway
              #4
              Re: Properties: Catch 22

              On Apr 18, 6:26 pm, pbd22 <dush...@gmail. comwrote:
              Hi. I am caught between 2 errors.
              >
              When I have:
              >
              Public Property Subtitle() As String
              Get
              Return _subTitle
              End Get
              Set(ByVal value As String)
              _subTitle = value
              End Set
              End Property
              >
              I get:
              >
              Error 21 Class 'WebPartBase' must implement 'ReadOnly Property
              Subtitle() As String' for interface
              'System.Web.UI. WebControls.Web Parts.IWebPart' . Implementing property
              must have matching 'ReadOnly' or 'WriteOnly' specifiers.
              >
              And, when I have:
              >
              Public ReadOnly Property Subtitle() As String
              Get
              Return _subTitle
              End Get
              End Property
              <snip>
              help?
              The Subtitle property on the IWebPart interface is just a read only
              property. Just get rid of the WriteOnly property, you don't need
              it.

              Chris

                Comment

                • pbd22
                  #5
                  Re: Properties: Catch 22

                  On Apr 19, 8:56 am, Chris Dunaway <dunaw...@gmail .comwrote:
                  On Apr 18, 6:26 pm, pbd22 <dush...@gmail. comwrote:
                  >
                  >
                  >
                  Hi. I am caught between 2 errors.
                  >
                  When I have:
                  >
                  Public Property Subtitle() As String
                  Get
                  Return _subTitle
                  End Get
                  Set(ByVal value As String)
                  _subTitle = value
                  End Set
                  End Property
                  >
                  I get:
                  >
                  Error 21 Class 'WebPartBase' must implement 'ReadOnly Property
                  Subtitle() As String' for interface
                  'System.Web.UI. WebControls.Web Parts.IWebPart' . Implementing property
                  must have matching 'ReadOnly' or 'WriteOnly' specifiers.
                  >
                  And, when I have:
                  >
                  Public ReadOnly Property Subtitle() As String
                  Get
                  Return _subTitle
                  End Get
                  End Property
                  >
                  <snip>
                  >
                  help?
                  >
                  The Subtitle property on the IWebPart interface is just a read only
                  property. Just get rid of the WriteOnly property, you don't need
                  it.
                  >
                  Chris

                  Thanks all, much appreciated.

                    Comment

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