Windows Form User Control Does Not Update When Its Property is Updated

Question

I have created a User Control in a Visual Basic Form application. It has a property called ID

Private intID As Integer

Public Property ID() As Integer
    Get
        Return intID
    End Get
    Set(value As Integer)
        intID = value
    End Set
End Property

And in the Load method of the User Control I am refreshing the components in the User Control based on the ID.

Private Sub UserControl_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    UpdateUserControlFields() ' This Method uses ID within
End Sub

Now I want this control to be shown with the correct ID whenever I do something in a Form that I added this User Control to. For example I have a DataGridView and whenever selection changes I want to update the user control:

Private Sub MyDataGridView_SelectionChanged(sender As Object, e As EventArgs) Handles MyDataGridView.SelectionChanged
    If Not IsNothing(MyBindingSource.Current) Then
        UserControlONE.ID = MyBindingSource.Current("someID")
        UserControlONE.Refresh() ' Doesn't Work.
        UserControlONE.Update() ' Doesn't Work.
    End If
End Sub

The problem is the user control loads correctly with the selected ID only the first time and I cannot seem to be able to reload it's data. Meaning if the value of the property ID changes I don't know how to enforce reloading the User Control. It shows the same data as the first ID it was loaded with. Any help will be appreciated.

Answer 1

Instead of updating the ID in the control load event, update it when the property changes:

Private intID As Integer

Public Property ID() As Integer
    Get
        Return intID
    End Get
    Set(value As Integer)
        intID = value
        UpdateUserControlFields() ' This Method uses ID within
    End Set
End Property

The UserControl_Load event "Occurs before the control becomes visible for the first time."