Very simple problem.
How to get a CLB with only one item ever checked? There's a simple property to allow only single-select, but not one for 'only allow one box to be checked at a time'
How to do this, from inside the 'ItemCheckedChanged' event handler, without causing a stack overflow, as the previously cheked items are un-checked?
I feel this must be really easy - am I just missing something?
1 Answer, 1 is accepted
There is no straightforward way to keep only single item checked in a RadCheckedListBox. However, this can be easily achieved by the following approach:
public RadForm1()
{
InitializeComponent();
this.radCheckedListBox1.ItemCheckedChanged += radCheckedListBox1_ItemCheckedChanged;
}
private void radCheckedListBox1_ItemCheckedChanged(object sender, ListViewItemEventArgs e)
{
this.radCheckedListBox1.ItemCheckedChanged -= radCheckedListBox1_ItemCheckedChanged;
ListViewDataItem itemToUncheck = null;
foreach (ListViewDataItem item in this.radCheckedListBox1.CheckedItems)
{
if (e.Item != item)
{
itemToUncheck = item;
break;
}
}
if (itemToUncheck!=null)
{
itemToUncheck.CheckState = Telerik.WinControls.Enumerations.ToggleState.Off;
}
this.radCheckedListBox1.ItemCheckedChanged += radCheckedListBox1_ItemCheckedChanged;
}I hope this information helps. If you need any further assistance please don't hesitate to contact me.
Regards,
Dess | Tech Support Engineer, Principal
Progress Telerik
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Rank 1
Hello Dess,
is there now an easier way to do this?
If not, I suggest a flag to set this behaviour. e.g. AllowMultipleChecks
Best regards
Fritz
