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06.18.2008 at 09:28PM PDT, ID: 23497727
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8.8

Issues using a web usercontrol dynamically

Asked by jvancojr in Programming for ASP.NET, Microsoft Visual Basic.Net, .NET Framework 2.x

Tags: ,

G Evening,
I have build multiple web usercontrols that work perfect is dragged and dropped on a web form but i can not get to work if loaded dynamically. When i dynamically load the control and set the custom properties, which are stored in a label control, I get a 'NullReferenceException was unhandled by user control'.
Setting ID (standard control proprty) loads without error, it is just the ones that call controls in the controlStart Free Trial 
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//Properties region of one of the Custom Web usercontrol BirthdayList.ascx
#Region "Properties"
 
    Public Property NewsletterMonth() As Integer
        Get
            Try
                Return CInt(Me.lblNewletterMonth.Text)
            Catch ex As Exception
                Return Now.Month
            End Try
 
        End Get
        Set(ByVal value As Integer)
            Me.lblNewletterMonth.Text = value.ToString
        End Set
    End Property
 
    Public Property NewsletterYear() As Integer
        Get
            Try
                Dim TheYear As Integer = CInt(Me.lblNewsletterYear.Text)
                If TheYear = 0 Then
                    Return Now.Year
                Else
                    Return TheYear
                End If
 
            Catch ex As Exception
                Return Now.Year
            End Try
        End Get
        Set(ByVal value As Integer)
            Me.lblNewsletterYear.Text = value.ToString
        End Set
    End Property
    Private Property EventID() As Integer
        Get
            Try
                Return Convert.ToInt16(lblEventID.Text)
            Catch ex As Exception
                Return 0
            End Try
 
        End Get
        Set(ByVal value As Integer)
            lblEventID.Text = value.ToString
        End Set
    End Property
    Public Property CN() As String
        Get
            Return Me.lblCN.Text
        End Get
        Set(ByVal value As String)
            Me.lblCN.Text = value
        End Set
    End Property
#End Region
 
//Code that loads the custom control
 Dim moduleToAdd As New usercontrols_BirthdayList
                With moduleToAdd
                    .ID = selectedLocation.ToString & counttolCount.ToString
                    .CN = cn
                    .NewsletterMonth = NewsLetterMonth
                    .NewsletterYear = NewsLetterYear
 
                End With
 
Keywords: Issues using a web usercontrol dynam…
Title
1 'Reload' or 'Reset'  UserControl
2 working with usercontrols dynamically
3 Usercontrol
4 An OCX with UserControl Resize
5 GetType() - UserControl
6 UserControl Issue
 
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[+][-]06.19.2008 at 12:01AM PDT, ID: 21819793

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[+][-]06.19.2008 at 12:22AM PDT, ID: 21819927

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[+][-]06.19.2008 at 09:02AM PDT, ID: 21823576

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[+][-]06.29.2008 at 05:11PM PDT, ID: 21896010

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[+][-]06.29.2008 at 11:36PM PDT, ID: 21897058

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About this solution

Zones: Programming for ASP.NET, Microsoft Visual Basic.Net, .NET Framework 2.x
Tags: VB.NET, IE 7
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Solution Provided By: ororiole
Participating Experts: 3
Solution Grade: A
 
 
[+][-]09.25.2008 at 04:59AM PDT, ID: 22568114

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[+][-]09.29.2008 at 02:57PM PDT, ID: 22601149

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