We help IT Professionals succeed at work.

Why am I getting an out of rang exception with the following "for loop"?

lapucca
lapucca asked
on
Medium Priority
269 Views
Last Modified: 2010-04-16
           int dropDownCount = actionMenu.DropDownItems.Count;
            if(dropDownCount > 6)
            {
                for (int index = 6; index < dropDownCount; index++)
                {
                    actionMenu.DropDownItems.RemoveAt(index);

                }
            }

Thanks.
Comment
Watch Question

Top Expert 2006
Commented:
If you are trying to remove all but the first six items, try the following code:

  int dropDownCount = actionMenu.DropDownItems.Count;
  for (int index = 6; index < dropDownCount; index++)
    actionMenu.DropDownItems.RemoveAt(6);

Or,

  int dropDownCount = actionMenu.DropDownItems.Count;
  for (int index = (dropDownCount - 1); index >= 6; index--)
    actionMenu.DropDownItems.RemoveAt(index);

Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts
Top Expert 2006

Commented:
Or even,

  while(actionMenu.DropDownItems.Count > 6)
    actionMenu.DropDownItems.RemoveAt(6);

Author

Commented:
Nop, I was trying to remove all items after the 6th item.  I got it working now.  You see, the count is changing with each item I remove so it eventually ran out and got the exception error.  Thanks.
anarki_jimbelSenior Developer
CERTIFIED EXPERT

Commented:
I believe the reason is that you alter underlying collection, and therefore alter the count of items.

Try to use 'while' loop:

while(actionMenu.DropDownItems.Count>6){
    actionMenu.DropDownItems.RemoveAt(6);
}
Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.