C sharp code download file

The above code is very similar to the synchronous example. The DownloadProgressChanged event is fired periodically as the download progresses and provides access to some useful properties such as BytesReceived and ProgressPercentage.

As expected, the DownloadFileCompleted event is fired whenever the file download has completed. As it stands, the above code will continue past the DownloadFileAsync method call while the download is in progress, since it is an asynchronous method call. In order to download the file asynchronously using the DownloadFileAsync method and wait until the download has completed before continuing program execution, we need to dip into the world of reset events.

The AutoResetEvent in the above code allows us to wait at the point where the WaitOne method is called. When the DownloadFileCompleted event is fired, the Set method on the AutoResetEvent sends a signal that allows the code to proceed to the next statement. Note that the use of AutoResetEvent as shown above, is a neat little trick that can be applied to any other asynchronous methods you want to call and subsequently wait for completion.

Although the above example works, there is a cleaner way to achieve the same result, providing you are targeting. NET Framework 4. NET Core 2. NET Standard 2. By using the await keyword when calling the DownloadFileTaskAsync method, the code will wait until the file download has completed, while at the same time carrying out the download asynchronously and firing the progress events. Note that whatever method you use the above code within needs to be marked with the async keyword.

Before attempting to use the HttpClient class, make sure you have the appropriate using statement in place, as follows. Note that even though HttpClient implements IDisposable it is recommended that you create one instance of HttpClient and reuse this throughout your program to avoid problems such as socket exhaustion.

As you can see from the above example, the code required to download a file using HttpClient is a little lower level compared to using WebClient , since we need to work with streams directly. Nonetheless, the code is still straightforward to follow along with. Note that as per the previous example, whatever method you use the above code within needs to be marked with the async keyword.

For any new development work, it is recommended that you use HttpClient. It has a number of advantages over WebClient , including more configuration options and it facilitates easier mocking and testing.

However, it does have some disadvantages, such as the lack of built-in progress reporting. Background While browsing forums today I came across a question which asked for a solution to download a file from a web server programmatically. Using the code C. Copy Code. Member Sep Chan Nyein Apr Siva Hyderabad Feb Rahim Lotfi Feb Shaharyar Ahmed 5-Feb D-Kishore Aug Go to top. Layout: fixed fluid. First Prev Next. Download file Member Aug Member How to download the. I am using Webclient.

But it's not downloading the full exe. I came up with a set of C 9. You may need to know the status and update a ProgressBar during the file download or use credentials before making the request. Here it is, an example that covers these options. Lambda notation and String interpolation has been used:. In the event that you need to set Headers and Cookies to download a file, you will need to do things slightly differently.

Here is an example How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to download a file from a URL in C? Ask Question. Asked 13 years, 1 month ago. Active 2 months ago.

Viewed k times. What is a simple way of downloading a file from a URL path? Improve this question. Termininja 6, 12 12 gold badges 43 43 silver badges 46 46 bronze badges. Have a look at System. WebClient — seanb.

Add a comment. Active Oldest Votes. Improve this answer. Bryan Legend 6, 1 1 gold badge 56 56 silver badges 57 57 bronze badges. Raj Kumar Raj Kumar 6, 5 5 gold badges 29 29 silver badges 38 38 bronze badges. The best solution ever but I would like to add 1 important line 'client.

Though I think that WebClient seems like a much more straightforward and simple solution. DownloadFileTaskAsync new Uri " somesite. Show 3 more comments.

Include this namespace using System. Abdul Saleem Abdul Saleem 8, 4 4 gold badges 39 39 silver badges 38 38 bronze badges. The question asks for the simplest way. Making more complicated isn't making it the simplest.

Most people would prefer a progress bar while downloading. So i just wrote the simplest way to do that. This might not be the answer but it meets the requirement of Stackoverflow. That is to help someone. This is just as simple as the other answer if you just leave out the progress bar. Also the question doesn't ask for the simplest way, just a simple way.

Jessedegans There is already an answer that shows how to simply download without a progressbar. Thats why I wrote an answer that helps with asynchronous download and progressbar implementation — Abdul Saleem.

This answer is good, probably better and more detailed than the one with more upvotes. It's almost obvious that one needs a progress indicator while downloading a file. The asynchronous functionality is a bonus. I was looking for such an implementation.