How to clear selected items from multiple checkedlistboxes

[abhishk2001 yahoo com]

Hi, I have a WindowsForm, which has a groupBox and has multiple CheckedListBox Controls. I want to clear all selected check items dynamically, instead of doing it individually. I want to get all the controls from the groupBox first, which also has other controls, then get the CheckedListBox controls and clearing it, if selected. I wrote this code, but it is not working, its not coming out of the loop. Any help, will be really appreciated. foreach(Control ctrl in this.groupBox1.Controls) { if(ctrl is CheckedListBox) { CheckedListBox cb=(CheckedListBox)ctrl; for(int i=0; i<=(cb.CheckedItems.Count-1); i++) { cb.ClearSelected(); } } } abhi

[Nick Parker]

Hmm, that is rather strange. Here is a quick work around.

private void ClearSelected()
{
	CheckedListBox clb = null;
	foreach(Control c in grp.Controls)
	{
		if(c is CheckedListBox)
		{
			clb = c as CheckedListBox;
			if(clb != null)
			{
				foreach(int index in clb.CheckedIndices)
					clb.SetItemChecked(index, false);
			}
		}
	}
}

- Nick Parker
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[Heath Stewart]

Consider that you might have nested controls, that a CheckedListBox may not be a direct child of a GroupBox. Consider a generic recursive loop like so:

void ClearSelected(ControlCollection controls)
{
if (controls == null || controls.Count == 0) return; // Quick
foreach (Control control in controls)
{
if (control is CheckedListBox) ((CheckedListBox)control).ClearSelected();
ClearSelected(control.Controls);
}
}

This will encounter any CheckedListBox at any depth in the parent/child hierarchy of controls. This posting is provided "AS IS" with no warranties, and confers no rights. Software Design Engineer Developer Division Sustained Engineering Microsoft [My Articles]