Track progress when using TPL's Parallel.ForEach

Question

What is the best way way to track progress in the following

long total = Products.LongCount();
long current = 0;
double Progress = 0.0;

Parallel.ForEach(Produc         


        

Answer 1

Since you are just doing a few quick calculations, ensure atomicity by locking on an appropriate object:

long total = Products.LongCount();
long current = 0;
double Progress = 0.0;
var lockTarget = new object();

Parallel.ForEach(Products, product =>
{
    try
    {
        var price = GetPrice(SystemAccount, product);
        SavePrice(product,price);
    }
    finally
    {
        lock (lockTarget) {
            Progress = ++this.current / total;
        }
    }});