Foreach loop, determine which is the last iteration of the loop

Question

I have a foreach loop and need to execute some logic when the last item is chosen from the List, e.g.:

 foreach (Item result in Mod         


        

Answer 1

The iterator implementation does not provide that. Your collection might be an IList that is accessible via an index in O(1). In that case you can use a normal for-loop:

for(int i = 0; i < Model.Results.Count; i++)
{
  if(i == Model.Results.Count - 1) doMagic();
}

If you know the count, but cannot access via indices (thus, result is an ICollection), you can count yourself by incrementing an i in the foreach's body and comparing it to the length.

All this isn't perfectly elegant. Chris's solution may be the nicest I've seen so far.

Answer 2

using Linq and the foreach:

foreach (Item result in Model.Results)   
{   
     if (Model.Results.IndexOf(result) == Model.Results.Count - 1) {
             // this is the last item
     }
}

https://code.i-harness.com/en/q/7213ce