VB.NET: Add\remove row indexes of datagridview checkboxes rows - vb.net

Question

I am working with forms in VB.NET
There is a DatagridView table with a checkbox column.
See the picture below:
I am interested in the question: how to add the line index to the list when clicking in the checkbox (when we activate the checked status), and remove it from the list when we uncheck the checkbox?
Tried the following but this is not the correct solution:
If e.ColumnIndex = chk_column.Index Then
If e.RowIndex >= 0 Then
Try
For Each row As DataGridViewRow In dataGridNames.Rows
Dim cell As DataGridViewCheckBoxCell = TryCast(row.Cells(5), DataGridViewCheckBoxCell)
If cell.Value Is cell.FalseValue Then
bList_indexes.Add(DataGridnames.CurrentCell.RowIndex)
Exit For
Else 'If cell.Value Is cell.TrueValue Then
bList_indexes.RemoveAt(DataGridnames.CurrentCell.RowIndex)
End If
Next
Catch ex As Exception
'Show the exception's message.
'MessageBox.Show(ex.Message)
'Throw New Exception("Something happened.")
End try
End If
End If

Answer 1

Using DataSources allows you to take the logic out of mucking around in DataGridView events. You shouldn't perform [much] business logic on the UI anyways.
Here is the class I used to represent your data.
Public Class ClassWithSelect
Public Property [Select] As Boolean
Public Property Name As String
Public Sub New(s As Boolean, n As String)
Me.Select = s
Me.Name = n
End Sub
End Class
And all the code to set DataSources
Private myDataSource As List(Of ClassWithSelect)
Private selectedIndices As List(Of Integer)
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
myDataSource = Enumerable.Range(65, 10).Select(Function(i) New ClassWithSelect(False, Chr(i).ToString())).ToList()
DataGridView1.DataSource = myDataSource
updateSelectedIndices()
End Sub
Private Sub DataGridView1_CellValueChanged(sender As Object, e As DataGridViewCellEventArgs) Handles DataGridView1.CellValueChanged
updateSelectedIndices()
End Sub
Private Sub DataGridView1_CellContentClick(sender As Object, e As DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick
DataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit)
End Sub
Private Sub updateSelectedIndices()
selectedIndices = New List(Of Integer)()
For i = 0 To myDataSource.Count - 1
If myDataSource(i).Select Then selectedIndices.Add(i)
Next
ListBox1.DataSource = selectedIndices
End Sub
And the end result
Now you don't need to access the UI to get the indices for further processing as they are in the class-level variable selectedIndices. The UI is meant for user I/O, NOT for storing state.
Note: The event handler was taken from this answer but this answer is also linked as an improvement to the check change handler, but I felt the complexity would distract from my answer. If you find you need to click fast, look into the latter.
Also Note: The method updateSelectedIndices() should have inside it an InvokeRequired check if you plan to perform work off the UI thread