Question

I have a problem that as i try to remove item from any list in following way i am unable to do that … why is that so the error is “use of unassigned local variable” where is it is assigned as shown below:

  public void RemoveFrmList(int ProdId)
        {
            int _index;
            foreach (Products item in BoughtItems)
            {
                if (item.ProductID == ProdId)
                {
                   _index = BoughtItems.IndexOf(item);
                }

            }
            BoughtItems.RemoveAt(_index);
        }

what can be done to remove this error?

Answer 1

_index is unassigned until you go in the loop. But if BoughtItems has no Product items, you will have a unnassigned variable _index. Or maybe you will never get an item with item.ProductID == ProdID.

So in other words:

int _index;
foreach (Products item in BoughtItems)
{
   //Code here is not executed during runtime for reasons stated above.
}
BoughtItems.RemoveAt(_index); //error here because _index was not assigned!

To fix it, you could do something like

int _index = -1;
foreach (...)
{
   //...
}
if (_index != -1){
   BoughtItems.RemoveAt(_index);
}
else
{
  //handle case if needed
}