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.
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. I test it, path can be included in filename. Panagiotis Kanavos Panagiotis Kanavos DownloadFile remoteUri,fileName ;. Christoffer Christoffer 2, 15 15 silver badges 21 21 bronze badges. Funny remark Many people do this me included , avoid MSDN references and go directly to a stackoverflow post.
When i try it i am getting file not found exception? 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. Podcast what if you could invest in your favorite developer? Headers, requestMessage. Method, requestMessage. Options, requestMessage. RequestUri, requestMessage. Version, requestMessage. Headers, responseMessage. IsSuccessStatusCode, responseMessage.
ReasonPhrase, requestMessageInfo, responseMessage. StatusCode, responseMessage. TrailingHeaders, responseMessage. FullMessage , ex2. FullMessage , WebExceptionStatus. ResponseHeadersRead, cancellationToken ; if! ReadAsync buffer, cancellationToken! WriteAsync buffer. SendAsync httpRequestMessage, cancellationToken ; if! Replace ", see inner exception. Lambda notation and String interpolation has been used: using System.
ToBase64String Encoding. WriteLine "Download finished! Kreshnik Kreshnik 2, 5 5 gold badges 29 29 silver badges 38 38 bronze badges. Some comments about the purpose of your code statements would be helpful, for those who are unfamiliar with asynchronous operations and cross-thread calls. Add "keep-alive" ; client. This response could be from HttpAgilityPack, or WebClient, or Puppeteer lots of options Manually entries from config values or hard coded values.
Cryptc Cryptc 1, 1 1 gold badge 11 11 silver badges 14 14 bronze badges. GetAwaiter ; Console. WriteLine "File was downloaded" ; Console. M22 M22 3 3 silver badges 8 8 bronze badges. GetWebRequest address ; if request! GZip DecompressionMethods.
The Overflow Blog. Podcast what if you could invest in your favorite developer? Who owns this outage? Building intelligent escalation chains for modern SRE. Featured on Meta. Connect and share knowledge within a single location that is structured and easy to search.
I'm trying to make a UI for downloading files from my site. The site have zip-files and these need to be downloaded to the directory entered by the user. However, I can't succeed to download the file, it just opens up from a temporary folder. My program does exactly what you are after, no prompts or anything, please see the following code.
This code will download the given file to the given directory after it has been created by the previous snippet:. So using these two pieces of code you can create all of the directories and then tell the downloader that doesn't prompt you to download the file to that location. WebBrowser e. Why not just bypass the WebClient's file handling pieces altogether.
Perhaps something similar to this:. Cancel the default navigation only for specific URLs you know a download will occur, or the user won't be able to navigate anywhere. This means you musn't change your website download URLs. DownloadFileAsync doesn't know the name reported by the server in the Content-Disposition header so you have to specify one, or compute one from the original URL if that's possible.
You cannot just specify the folder and expect the file name to be retrieved automatically. You have to handle download server errors from the DownloadCompleted callback because the web browser control won't do it for you anymore. Sample piece of code, that will download into the directory specified in textBox1 , but with a random file name, and without any additional error handling:. This solution should work but can be broken very easily. Try to consider some web service listing the available files for download and make a custom UI for it.
It'll be simpler and you will control the whole process. My suggestion is try the synchronous download as its more straightforward. A much simpler solution would be to download the file using Chrome. In this manner you don't have to manually click on the save button.
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.
0コメント