Reading the value of the cell

I have some DataGridView code written in vb.net. (Nothing is attached to a datasource.)

The 4th column is a checkboxCell. How do I detect if that checkBox is checked or unchecked?

This code strangely reports TRUE开发者_运维百科 or FALSE at random times. It even turns ON the checkbox in rows other than the row I clicked in.

Private Sub DataGridView1_CellContentClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick
   Dim whichGrid As DataGridView = CType(sender, DataGridView)

   Dim rowClicked As Int16 = e.RowIndex

   Call MsgBox(rowClicked & vbCrLf & whichGrid.Rows(rowClicked).Cells(4).Value)

End Sub

All the other examples I've looked at here (and elsewhere) don't seem to help. Their solutions are always:

• Just check the cell's VALUE.
• Just learn c#, and learn to convert it to vb.net.
• Just check VALUE for nothing, or null, or "", or all of those.
• Convert VALUE to a bool.
• Attach it to a datasource instead.
• Set TrueValue and FalseValue.

I've tried countless other methods, none seem to actually get the checkbox ON/OFF value in vb.net.

Cast the cell's value to a Boolean:

Dim RowIndex As Integer = ...
Dim ColumnIndex As Integer = ...

Dim IsTicked As Boolean = CBool(DataGridView1.Rows(RowIndex).Cells(ColumnIndex).Value)

If IsTicked Then
    MessageBox.Show("You ticked the box.")
Else
    MessageBox.Show("You cleared the box.")
End If