VB .Net Can i manage all events from inside a groupbox in an efficient way?

Question

I have a groupbox containing a lot of Checkboxes - only Checkboxes.

Is there a simple/fast way to handle the same event coming from different controls?

I know I can write a single sub and let it handle all the Events, but it's really time-consuming to write.

Using Visual Studio 2012

Answer 1

If your time concern is about writing and managing a large Handles clause, you can simply loop through the GroupBox's Controls collection upon construction of your UserControl/Form and wire up each event on each CheckBox, like so:

Imports System.Linq

Public Sub New()
    InitializeComponent()

    For Each chkBox As CheckBox In yourGroupBoxVariable.Controls.OfType(Of CheckBox)()
        AddHandler chkBox.CheckStateChanged, AddressOf YourCheckStateChangedHandlerMethod
    Next
End Sub

Private Sub YourCheckStateChangedHandlerMethod(ByVal sender As Object, ByVal e As EventArgs)
    ' Your handler code for the checkboxes
End Sub

This leverages LINQ's OfType Enumerable extension to filter down all child controls of the GroupBox to those of type CheckBox.