How to stop a Parallel.ForEach loop?

Question

I have this code to start a Parallel ForEach loop:

Parallel.ForEach<ListViewItem>(filesListView.Items.Cast<ListViewItem>(), new ParallelOptions() { MaxDegreeOfParallelism = Environment.ProcessorCount }, item => {
    if (CallToStop == true)
        {  
            //Code here to stop the loop!
        }        
    internalProcessStart(item);
});

I have some code which will check if there is a call to stop the threads, and then I would like to break; the code, but this doesn't work with Parallel.

I found the same question by someone else, but their code is slighly different to mine, and I'm not sure where to put the ParallelLoopState state.

Thanks!

Answer 1

Rewrite as below:

Parallel.ForEach<ListViewItem>(
    filesListView.Items.Cast<ListViewItem>(), 
    new ParallelOptions() { MaxDegreeOfParallelism = Environment.ProcessorCount }, 
    (item, state) => 
    {
        if (CallToStop == true)
        {  
            state.Break();
        }        
        internalProcessStart(item);
    }
);

Hope this helps.