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. In this article, I have covered the two main ways of downloading files using C and the.
WebClient makes it really easy to download files, with its high-level API and it is available regardless of what. NET version you are targeting. Use HttpClient whenever you need more control and as the recommended option for new development. Yes, add me to your mailing list. This site uses Akismet to reduce spam.
It downloads to a local file the resource with the specified URI. Also this method does not block the calling thread. 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 website in C [closed] Ask Question. Asked 12 years, 9 months ago. Active 1 year, 7 months ago. Viewed k times. Improve this question. Mitch's comment is the most direct and most accurate answer, lol!
Unless you are new to. The idea of this site is not to tell people to google for their answers, the idea of this site is for people to ask questions despite how stupid they are so that when people google in the future the answer will be right here.
Show 1 more comment. Active Oldest Votes. With the WebClient class : using System. GetAsync " nvd. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Who owns this outage? Building intelligent escalation chains for modern SRE. Podcast Who is building clouds for the independent developer?
Featured on Meta. Now live: A fully responsive profile. Reducing the weight of our footer. Linked From my perspective, I can see only one disadvantage in using WebClient, that would be the non async call, blocking the calling thread.
But what if I am not worried about the blocking of thread or use client. DownloadFileAsync to leverage the async support? On the other hand, if I use HttpClient, ain't I loading every single byte of a file into memory and then writing it to a local file? If the file size is too large, won't memory overhead be expensive? Which could be avoided if we use WebClient, since it will directly write to local file and not consume system memory.
So, if performance is my utter priority, which approach should I use for download? I would like to be clarified if my above assumption is wrong, and I am open to alternate approach as well. You can do it natively with.
I tried doing it your way and then I just found a method in Intellisense that seemed to make sense.
Note that code is saving the address of the proxy server I use at work in a setting, and using that if such setting is specified. Otherwise, it should tell you all you need to know regarding using the HttpClient beta to download and save a file. If you want or have to do this synchronously, but using the nice HttpClient class, then there's this simple approach:.
For code being called repeatedly, you do not want to put HttpClient in a using block it will leave hanging ports open. For downloading a file with HttpClient, I found this extension method which seemed like a good and reliable solution to me:. 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. Download file with WebClient or HttpClient? Ask Question. Asked 4 years, 3 months ago. Active 9 months ago.
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