Checked list box Checked items Verification

Question

I have a Checkedlistbox that have the following information:

*************
*__All Cells*
*__Cell A   *
*__Cell B   *
*__Cell C   *
*__Cell D   *
*************

I want to check every field that i want, however i want to if I check the "All Cells" Checkbox, all the fields have to checked automatically, I already can do this. The part that need help if that I want that when i uncheck the "All Cells" checkbox all the cells are supposed to unchecked.

Here is the code that i use. Please help me with this.

private void Cells_CheckedListBox_SelectedIndexChanged(object sender, EventArgs e)
{       
    if (Cells_CheckedListBox.GetItemChecked(Cells_CheckedListBox.Items.IndexOf("All Cells")))
    {
        for (int i = 0; i < Cells_CheckedListBox.Items.Count; i++)
        {
            Cells_CheckedListBox.SetItemCheckState(i, CheckState.Checked);
        }
    } 
}

Answer 1

You seem to be doing this in the wrong event altogether. You should handle the ItemCheck event.

private void Cells_CheckedListBox_ItemCheck(object sender, ItemCheckEventArgs e)
{
    int allIndex = Cells_CheckedListBox.Items.IndexOf("All Cells");
    if (e.Index == allIndex)
    {
        for (int i = 0; i < Cells_CheckedListBox.Items.Count; i++)
        {
            if (i != allIndex)
                Cells_CheckedListBox.SetItemCheckState(i, e.NewValue);
        }
    }
}