Property missing value

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  • shapper
    #1

    Property missing value

    Hello,

    I have a control with the following property:

    Private _Sections As New List(Of FormSection)
    Public Property Sections() As List(Of FormSection)
    Get
    If _Sections Is Nothing Then
    _Sections = New List(Of FormSection)
    End If
    Return _Sections
    End Get
    Set(ByVal value As List(Of FormSection))
    _Sections = value
    End Set
    End Property

    FormSection is another custom control. My control inherits from
    CompositeContro l and I implement it as follows:

    Protected Overrides Sub CreateChildCont rols()
    For Each section As FormSection In Me.Sections
    MyBase.Controls .Add(section)
    Next
    MyBase.CreateCh ildControls()
    End Sub

    Finally I need to run a method from a child control in each section
    when a Bubble event is caught:

    Protected Overrides Function OnBubbleEvent(B yVal source As Object,
    ByVal e As EventArgs) As Boolean

    If TypeOf e Is CommandEventArg s Then

    For Each section In Me.Sections
    For Each field In section.Fields
    If Not field.Validate Then

    ' Stop bubbling for EventArgs
    Return True

    End If
    Next field
    Next section
    OnCommand(e)

    End If

    ' Let bubbling run for non CommandEventArg s
    Return False

    End Function

    The problem is that Me.Sections has no section in it so the loop does
    not run.

    But the sections are there! I added them and when I run the page I see
    all them.

    What am I doing wrong?

    Thanks,

    Miguel
    Tags: None
    • Kevin Spencer
      #2
      Re: Property missing value

      The OnBubbleEvent method is called prior to the CreateChildCont rols method
      in the Control lifecycle.

      --
      HTH,

      Kevin Spencer
      Chicken Salad Surgeon
      Microsoft MVP

      "shapper" <mdmoura@gmail. comwrote in message
      news:c64ea088-46d0-46a4-8d7d-c6483ad47c22@n7 7g2000hse.googl egroups.com...
      Hello,
      >
      I have a control with the following property:
      >
      Private _Sections As New List(Of FormSection)
      Public Property Sections() As List(Of FormSection)
      Get
      If _Sections Is Nothing Then
      _Sections = New List(Of FormSection)
      End If
      Return _Sections
      End Get
      Set(ByVal value As List(Of FormSection))
      _Sections = value
      End Set
      End Property
      >
      FormSection is another custom control. My control inherits from
      CompositeContro l and I implement it as follows:
      >
      Protected Overrides Sub CreateChildCont rols()
      For Each section As FormSection In Me.Sections
      MyBase.Controls .Add(section)
      Next
      MyBase.CreateCh ildControls()
      End Sub
      >
      Finally I need to run a method from a child control in each section
      when a Bubble event is caught:
      >
      Protected Overrides Function OnBubbleEvent(B yVal source As Object,
      ByVal e As EventArgs) As Boolean
      >
      If TypeOf e Is CommandEventArg s Then
      >
      For Each section In Me.Sections
      For Each field In section.Fields
      If Not field.Validate Then
      >
      ' Stop bubbling for EventArgs
      Return True
      >
      End If
      Next field
      Next section
      OnCommand(e)
      >
      End If
      >
      ' Let bubbling run for non CommandEventArg s
      Return False
      >
      End Function
      >
      The problem is that Me.Sections has no section in it so the loop does
      not run.
      >
      But the sections are there! I added them and when I run the page I see
      all them.
      >
      What am I doing wrong?
      >
      Thanks,
      >
      Miguel

        Comment

        • shapper
          #3
          Re: Property missing value

          On Feb 25, 11:41 am, "Kevin Spencer" <unclechutney@l ocalhostwrote:
          The OnBubbleEvent method is called prior to the CreateChildCont rols method
          in the Control lifecycle.
          >
          --
          HTH,
          >
          Kevin Spencer
          Chicken Salad Surgeon
          Microsoft MVP
          >
          "shapper" <mdmo...@gmail. comwrote in message
          >
          news:c64ea088-46d0-46a4-8d7d-c6483ad47c22@n7 7g2000hse.googl egroups.com...
          >
          Hello,
          >
          I have a control with the following property:
          >
          Private _Sections As New List(Of FormSection)
          Public Property Sections() As List(Of FormSection)
          Get
          If _Sections Is Nothing Then
          _Sections = New List(Of FormSection)
          End If
          Return _Sections
          End Get
          Set(ByVal value As List(Of FormSection))
          _Sections = value
          End Set
          End Property
          >
          FormSection is another custom control. My control inherits from
          CompositeContro l and I implement it as follows:
          >
          Protected Overrides Sub CreateChildCont rols()
          For Each section As FormSection In Me.Sections
          MyBase.Controls .Add(section)
          Next
          MyBase.CreateCh ildControls()
          End Sub
          >
          Finally I need to run a method from a child control in each section
          when a Bubble event is caught:
          >
          Protected Overrides Function OnBubbleEvent(B yVal source As Object,
          ByVal e As EventArgs) As Boolean
          >
          If TypeOf e Is CommandEventArg s Then
          >
          For Each section In Me.Sections
          For Each field In section.Fields
          If Not field.Validate Then
          >
          ' Stop bubbling for EventArgs
          Return True
          >
          End If
          Next field
          Next section
          OnCommand(e)
          >
          End If
          >
          ' Let bubbling run for non CommandEventArg s
          Return False
          >
          End Function
          >
          The problem is that Me.Sections has no section in it so the loop does
          not run.
          >
          But the sections are there! I added them and when I run the page I see
          all them.
          >
          What am I doing wrong?
          >
          Thanks,
          >
          Miguel
          So there is no solution to this?
          How is this usually done? Any idea?

          Basically, I need to stop the event if the Section controls do not
          validate ...

          Thanks,
          Miguel

            Comment

            • =?Utf-8?B?YnJ1Y2UgYmFya2Vy?=
              #4
              Re: Property missing value

              in OnBubbleEvent, before accessing any child controls, call
              EnsureChildCont rols().

              -- bruce (sqlwork.com)


              "shapper" wrote:
              On Feb 25, 11:41 am, "Kevin Spencer" <unclechutney@l ocalhostwrote:
              The OnBubbleEvent method is called prior to the CreateChildCont rols method
              in the Control lifecycle.

              --
              HTH,

              Kevin Spencer
              Chicken Salad Surgeon
              Microsoft MVP

              "shapper" <mdmo...@gmail. comwrote in message

              news:c64ea088-46d0-46a4-8d7d-c6483ad47c22@n7 7g2000hse.googl egroups.com...
              Hello,
              I have a control with the following property:
              Private _Sections As New List(Of FormSection)
              Public Property Sections() As List(Of FormSection)
              Get
              If _Sections Is Nothing Then
              _Sections = New List(Of FormSection)
              End If
              Return _Sections
              End Get
              Set(ByVal value As List(Of FormSection))
              _Sections = value
              End Set
              End Property
              FormSection is another custom control. My control inherits from
              CompositeContro l and I implement it as follows:
              Protected Overrides Sub CreateChildCont rols()
              For Each section As FormSection In Me.Sections
              MyBase.Controls .Add(section)
              Next
              MyBase.CreateCh ildControls()
              End Sub
              Finally I need to run a method from a child control in each section
              when a Bubble event is caught:
              Protected Overrides Function OnBubbleEvent(B yVal source As Object,
              ByVal e As EventArgs) As Boolean
              If TypeOf e Is CommandEventArg s Then
              For Each section In Me.Sections
              For Each field In section.Fields
              If Not field.Validate Then
              ' Stop bubbling for EventArgs
              Return True
              End If
              Next field
              Next section
              OnCommand(e)
              End If
              ' Let bubbling run for non CommandEventArg s
              Return False
              End Function
              The problem is that Me.Sections has no section in it so the loop does
              not run.
              But the sections are there! I added them and when I run the page I see
              all them.
              What am I doing wrong?
              Thanks,
              Miguel
              >
              So there is no solution to this?
              How is this usually done? Any idea?
              >
              Basically, I need to stop the event if the Section controls do not
              validate ...
              >
              Thanks,
              Miguel
              >

                Comment

                • shapper
                  #5
                  Re: Property missing value

                  On Feb 25, 4:44 pm, bruce barker
                  <brucebar...@di scussions.micro soft.comwrote:
                  in OnBubbleEvent, before accessing any child controls, call
                  EnsureChildCont rols().
                  >
                  -- bruce (sqlwork.com)
                  >
                  "shapper" wrote:
                  On Feb 25, 11:41 am, "Kevin Spencer" <unclechutney@l ocalhostwrote:
                  The OnBubbleEvent method is called prior to the CreateChildCont rols method
                  in the Control lifecycle.
                  >
                  --
                  HTH,
                  >
                  Kevin Spencer
                  Chicken Salad Surgeon
                  Microsoft MVP
                  >
                  "shapper" <mdmo...@gmail. comwrote in message
                  >
                  >news:c64ea08 8-46d0-46a4-8d7d-c6483ad47c22@n7 7g2000hse.googl egroups.com...
                  >
                  Hello,
                  >
                  I have a control with the following property:
                  >
                  Private _Sections As New List(Of FormSection)
                  Public Property Sections() As List(Of FormSection)
                  Get
                  If _Sections Is Nothing Then
                  _Sections = New List(Of FormSection)
                  End If
                  Return _Sections
                  End Get
                  Set(ByVal value As List(Of FormSection))
                  _Sections = value
                  End Set
                  End Property
                  >
                  FormSection is another custom control. My control inherits from
                  CompositeContro l and I implement it as follows:
                  >
                  Protected Overrides Sub CreateChildCont rols()
                  For Each section As FormSection In Me.Sections
                  MyBase.Controls .Add(section)
                  Next
                  MyBase.CreateCh ildControls()
                  End Sub
                  >
                  Finally I need to run a method from a child control in each section
                  when a Bubble event is caught:
                  >
                  Protected Overrides Function OnBubbleEvent(B yVal source As Object,
                  ByVal e As EventArgs) As Boolean
                  >
                  If TypeOf e Is CommandEventArg s Then
                  >
                  For Each section In Me.Sections
                  For Each field In section.Fields
                  If Not field.Validate Then
                  >
                  ' Stop bubbling for EventArgs
                  Return True
                  >
                  End If
                  Next field
                  Next section
                  OnCommand(e)
                  >
                  End If
                  >
                  ' Let bubbling run for non CommandEventArg s
                  Return False
                  >
                  End Function
                  >
                  The problem is that Me.Sections has no section in it so the loop does
                  not run.
                  >
                  But the sections are there! I added them and when I run the page I see
                  all them.
                  >
                  What am I doing wrong?
                  >
                  Thanks,
                  >
                  Miguel
                  >
                  So there is no solution to this?
                  How is this usually done? Any idea?
                  >
                  Basically, I need to stop the event if the Section controls do not
                  validate ...
                  >
                  Thanks,
                  Miguel
                  I tried but it does not work.

                  Any idea?

                  Thanks,
                  Miguel

                    Comment

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