C# parallel.foreach list string download file

He likes working on new technologies and exciting challenging projects. NET March Dark. NET Improved file download using chunks of file in parallel in C. Note The class and method are static and they are setting ServicePointManager class properties which is also static. JavaScript Copy text value to clipboard using jQuery Simple sample of using jQuery to copy value to clipboard.

Resize image on the client side with JQuery Reducing the upload sie by resizing image on the client side. Getting first and last second of the current year, month and day Using minimum and maximum date time in SQL query. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. How to: Write a simple Parallel. Is this page helpful? Please rate your experience Yes No. Any additional feedback? This is the simplest overloaded version that accepts two arguments.

The first one is the collection of objects that will be enumerated. The second parameter accepts an Action delegate, usually expressed as a lambda expression that determines the action to take for each item in the collection. Let us understand Parallel Foreach with an example. First, we will write an example using the standard sequential Foreach loop and will see how much time it will take to complete the execution.

Then we will write the same example using the Parallel ForEach method and will see how much time it will take to complete the execution of the same example. In the below example, we create a sequential Foreach loop that performs a long-running task once for each item in the collection. The code below loops through a list of ten integers generated using the Enumerable.

Range method. The DoSomeIndependentTimeconsumingTask method performs a calculation that is included to generate a long enough pause to see the performance improvement of the parallel version. A plain text description of what the code is supposed to be doing would also be helpful. Don't want to overwhelm But , the more important question is, how slow is graph. What problem are you trying to solve?

For only provides a theoretical constant-time improvement i. In big-O notation, this speed-up is completely irrelevant, especially if this is a programming assignment. If this is a real world app, otoh, you will typically concentrate on providing a progress bar and making the operation run in background. I marked Dudi as correct because his suggestions helped the most. Thank you for all your help.

Add a comment. Active Oldest Votes. Also if you use Parallel. Foreach, you can avoid the null checking for allFileLines[i]. For this you need to use this overload: Parallel. ProcessorCount ; Parallel. The partitioner here is simple and based on the range and the numbers of cores.

Improve this answer. Dudi Keleti Dudi Keleti 1 1 silver badge 4 4 bronze badges. Do you have an example of how to use the ForEach overload you mentioned? And the custom partitioner? The benefits of this approach: I am not a Parallel. For guru but I suspect that it creates a set of new threads each time it is run, which is time consuming. You can instantiate multiple consumers if the producer is reading in the content faster than the consumer s can process it.

Add "Kiwi fruit" ; fruits. Add "Lemon" ; fruits. Add "Lime" ; fruits. Add "Lychee" ; fruits. Add "Mango" ; fruits. Add "Melon" ; fruits. Add "Olive" ; fruits. Add "Orange" ; fruits. Add "Papaya" ; fruits. Add "Plum" ; fruits. Add "Pineapple" ; fruits.

Add "Pomegranate" ; Console. TotalSeconds ; Console. WriteLine "Printing list using Parallel.