Replacing a button in the Command Bar

[Paul]

I am trying to conditionally switch between a Command Bar Button and a Command Bar Drop-Down Button with this code:
  

 

if (A)
{
    if (commandBarStripElement1.Items.Contains(cbbCopy))
    {
        location = commandBarStripElement1.Items.IndexOf(cbbCopy);
        commandBarStripElement1.Items[location] = cbDropDownButtonCopy;
    }
 }
else
{
    if (commandBarStripElement1.Items.Contains(cbDropDownButtonCopy))
    {
        location = commandBarStripElement1.Items.IndexOf(cbDropDownButtonCopy);
        commandBarStripElement1.Items[location] = cbbCopy;
    }

 

The code works fine when A is true, but the second time the function is entered and A is false. I get this error:

System.InvalidOperationException: Element already added

The error is thrown from this line:
 

 

commandBarStripElement1.Items[location] = cbbCopy;

I've debugged in and checked all of the items in commandBarStripElement1 and cbbCopy is not in there. Is there some other way to swap items in the Command Bar while maintaining their position?

 

 

 

[Paul]

I accomplished what I wanted by setting the button's Visibility to ElementVisibility.Collapsed instead of adding and removing the buttons. If there is a better way to handle this, please let me know.

[Stefan]

Hi Paul,

I can confirm this is a better way to do that and in fact this is what I was going to suggest.

Should you have any other questions, do not hesitate to contact us.
 
Regards,
Stefan
Telerik