C# downloading multiple files async

Please Sign up or sign in to vote. See more: C. But there are some limitations on the framework, it has to be coded using. NET 4. Hence cant advanced TPL library. What I have tried:. Copy Code. Posted Jun am karekarmahadev. Add a Solution. Gerry Schmitz Jun am. Ha ha ha ha ha ha ha. You funny. Richard MacCutchan Jun am. Afzaal Ahmad Zeeshan Jun pm. On 10, machines, with dedicated network bandwidth.

Top Rated Most Recent. Accept Solution Reject Solution. Don't be silly. Distributed Denial of Service? That works by flooding a server with requests so that it is so busy it crashes or is otherwise unable to process new legitimate requests.

And that's what you are trying to do, without the "Distributed" part. No matter how much memory you have, you will exhaust it: and then yoru system will go into grind mode as it starts paging to disk in order to free up memory to add more downloads, which are already using so much bandwidth that you internet connection slows to a crawl No, you can't do it.

Posted Jun am OriginalGriff. C Download multiple files with progress bar You can easily create a c download file from server using the WebClient class without using any third party libraries. DefaultNetworkCredentials; client. GetFileName uri. LocalPath ; await client. Show "You have finished downloading the file.

OK, MessageBoxIcon. ProgressPercentage; progressBar. The original example has the statement await sourceStream. WriteAsync encodedText, 0, encodedText. Length ; , which is a contraction of the following two statements:. The first statement returns a task and causes file processing to start.

The second statement with the await causes the method to immediately exit and return a different task. When the file processing later completes, execution returns to the statement that follows the await. The text is buffered and, in this case, placed into a StringBuilder. Unlike in the previous example, the evaluation of the await produces a value.

For more information, see Async Return Types C. For each file, the WriteAsync method returns a task that is then added to a list of tasks. The await Task. WhenAll tasks ; statement exits the method and resumes within the method when file processing is complete for all of the tasks.

The example closes all FileStream instances in a finally block after the tasks are complete. If each FileStream was instead created in a using statement, the FileStream might be disposed of before the task was complete.

Any performance boost is almost entirely from the parallel processing and not the asynchronous processing. The advantages of asynchrony are that it doesn't tie up multiple threads, and that it doesn't tie up the user interface thread.

When using the WriteAsync and ReadAsync methods, you can specify a CancellationToken , which you can use to cancel the operation mid-stream.