CheckBox in DataGridView

[Zaluke]

In this program I will teach you on how to validate a CheckBox control before the value are change inside a DataGridView.

I have tested all the events and only DataGridView CellMouseDown can do this. The point here is to validate first if the user really want to change the value of a CheckBox to true. If not then the value of a CheckBox will revert to false.

The important code in this program is:

1. Private
   
   Sub
   
   DataGridView1_CellMouseDown(
   
   ByVal
   
   sender As
   
   Object
   
   , ByVal
   
   e As
   
   System.
   
   Windows
   
   .
   
   Forms
   
   .
   
   DataGridViewCellMouseEventArgs
   
   )
   
   Handles
   
   DataGridView1.
   
   CellMouseDown
   
2. If
   
   e.
   
   ColumnIndex
   
   =
   
   5
   
   Then
   
3. If
   
   DataGridView1(
   
   5
   
   , e.
   
   RowIndex
   
   )
   
   .
   
   Value
   
   (
   
   )
   
   =
   
   False
   
   Then
   
4. If
   
   MessageBox.
   
   Show
   
   (
   
   "Are you sure you want to discontinue this product?"
   
   , "CheckBox"
   
   , MessageBoxButtons.
   
   YesNo
   
   )
   
   =
   
   Windows.
   
   Forms
   
   .
   
   DialogResult
   
   .
   
   Yes
   
   Then
   
5. DataGridView1(
   
   5
   
   , e.
   
   RowIndex
   
   )
   
   .
   
   Value
   
   =
   
   True
   
6. End
   
   If
   
7. End
   
   If
   
8. End
   
   If
   
9. End
   
   Sub
   

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