break up array into little arrays

Question

i am sending out email to a list of people. I have the list of recipients in array but the list can get up to 500 people. There is a limitation on the number of recipients

Answer 1

A common method for "paging" results from a set is to combine the Skip and Take methods provided by LINQ. This solution is great because it can be further combined with other LINQ methods to implement filtering, ordering, etc. as needed.

I'm not sure what the performance considerations are for your application, so keep in mind that this may not perform very well for sets where the number of pages is relatively large (i.e., batch size is significantly smaller than the total size of the set), but it's at least fairly straightforward for anyone familiar with this style of coding.

Here's an example of what this implementation might look like:

List list = new List();
const int BATCH_SIZE = 50;

for (int i = 0; i < list.Count; i += BATCH_SIZE)
{
   IEnumerable currentBatch = 
      list.Skip(i).Take(BATCH_SIZE);

   // do stuff...
}