Question

The problem is that the program throws an exception. After creating multiple threads. How can we limit the number of threads to be created in the loop?

 for (int jrCnt = rCnt; jrCnt <= arrayTable.GetUpperBound(0); jrCnt++)
                {
                    /* bla bla bla */

                    if ((!string.IsNullOrEmpty(prcI.name)) &&
                        (prcI.prc != 0))
                    {
                        /*bla bla bla*/

                        var thread = // run updade or add
                                                    new Thread(() =>
                                                    {

                                                        if (!Accessor.AddProductUpdateProduct(prcI)) _updateCounter++;
                                                        _countadd++;

                                                    });
                        thread.Name = "Add_or_update-no_" + thread.ManagedThreadId;
                        thread.Priority = ThreadPriority.Lowest;

                        thread.Start();
                    }

Some clarification.

Here is the loop starts top n number of times. Once I add Threadpool this loop is very fast. Therefore Threadpool triggered 180 times. I apologize for my English.

for (int i = sbook; i < book; i++)
            {
                dt = Accessor.ImporterXls(_path, i);// array for method

                ConstructWithBook(dt, rCnt, sbook, book, priceSelect, nametov, pricetov,
                                 categorytov);
            }

Answer 1

Try using a ThreadPool, MSDN Thread Pool Class Description