Disabling an item in a checkedListBox C#

Hi all,

Does anyone know how to grey out and disable an item in a checkedListBox so that
the user cannot check that item.

with regards
James

A, I do not now but do you now how to add value from rows,
to CheckedListBox like it's items ?

Thansk

Example

CheckBoxList1.Items[1].Enabled = false;

you can use the above code to disbale the items of a check box list

This clearly wouldn't work in a WinForms CheckedListBox as CheckedListBox1.Items[1] is of type "object" which has no Enabled property.

There's no built in way of doing it, but you can work around it with by adding the specific item with CheckState.Indeterminate. This "looks" like it's checked and disabled. However, as it isn't really disabled, you'll need to handle the ItemCheck event and stop the user from changing the checked state.

Here is some sample code that can be used in the ItemCheck event of a CheckedListBox to make items disable like...


try
{
if (e.Index == 0 && e.NewValue == CheckState.Checked)
{
if (chkListBoxCategoris.SelectedValue.ToString() == "All")
{
for (int i = 1; i < chkListBoxCategoris.Items.Count; i++)
{
chkListBoxCategoris.SetItemCheckState(i, CheckState.Indeterminate);
}
}
}
else if (chkListBoxCategoris.GetItemCheckState(0) == CheckState.Checked)
{
if (e.Index != 0 && checkFlag == false)
{
if (e.CurrentValue == CheckState.Indeterminate)
{
e.NewValue = e.CurrentValue;
}
}
else if (e.Index == 0)
{
checkFlag = true;
for (int i = 1; i < chkListBoxCategoris.Items.Count; i++)
{
chkListBoxCategoris.SetItemCheckState(i, CheckState.Unchecked);
}
checkFlag = false;
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}




Happy Coding...
Gokulan V