Controls - Do you include a "select all" checkBox on the top?

Do you have checkbox (on the top) that let users select or unselect all checkboxes underneath it? If you have a list of checkboxes, you are going to frustrate users unless you provide an easy way to select all. The best way to achieve this is to have a checkbox at the top.

Private Sub CheckBoxSelectAll\_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) \_
Handles CheckBoxSelectAll.CheckedChanged
'Select checkbox in each row
For Each sDataGridViewRow As DataGridViewRow In Me.DataGridViewCustomer.Rows
sDataGridViewRow.Cells(0).Value = Me.CheckBoxSelectAll.Checked
Next
End Sub

Code: Code for selecting all checkboxes in a windows form

<script type="text/javascript">
function SeleteCheckBox()
{
for (var n=0; n < document.form1.elements.length; n++)
{
if (document.form1.elements[n].type == "checkbox" && document.form1.elements[n].name == "gridview")
{
document.form1.elements[n].checked = document.getElementById("CheckBoxAll").checked;
}
}
}
</script>

Code: Code for selecting all checkboxes in a web form We have suggestions for Visual Studio .NET about this at A top CheckBox to "select all" in windows forms and A top CheckBox to "select all" in web forms.