Note that instead of asking the imaging library to detect the image format you can also look at the response headers to see what format the source thinks the image is using webClient. ResponseHeaders["Content-Type"] — bikeman This would also be much more memory efficient than expanding the compressed image into an uncompressed Bitmap object, and would allow you to save the image in its original format with its original compression etc.
Eric Aya 69k 34 34 gold badges silver badges bronze badges. Brian Cryer Brian Cryer 1, 13 13 silver badges 17 17 bronze badges. NET has changed a bit over the years, making the other answers on this post pretty dated: They use Image from System. Drawing which is not available for.
WebClient which is deprecated We don't recommend that you use the WebClient class for new development. NET Core asynchronous solution Getting the file extension The first part of getting the file extension is to remove all the unnecessary parts from the URL. GetLeftPart UriPartial. GetByteArrayAsync uri ; await File. IO; using System. Tasks; using System. It is supposed to be reused throughout the application. I wrote a short example of an ImageDownloader 50 lines with more documentation that correctly reuses the HttpClient and properly disposes of it that you can find here.
MarcusOtter MarcusOtter 5 5 silver badges 15 15 bronze badges. Think you have a small typo in your code. Thanks MattWelke, I think that was a leftover from the gist of the full class. In the future you should be able to edit posts with your suggestions directly : — MarcusOtter. It didn't let me edit this time. Something about lack of reputation to suggest edits?
I have seen him — Zeeshan Ahmad Khalil. Ali Humayun Ali Humayun 1, 1 1 gold badge 15 15 silver badges 11 11 bronze badges. So to improve the suggestions above here is the entire method: public System. HttpWebRequest System. Create imageUrl ; webRequest. CloseConnectionGroup webRequest. Be05x5 Be05x5 61 6 6 bronze badges. ReadAllBytes str , System. GetMimeMapping str , Path. Chandan Kumar Chandan Kumar 10 10 silver badges 14 14 bronze badges. GetResponse ; if httpWebResponse.
StartsWith "image", StringComparison. Read bytes, 0, bytes. Length ; fileStream. The Overflow Blog. Podcast Who is building clouds for the independent developer? Exploding turkeys and how not to thaw your frozen bird: Top turkey questions Featured on Meta. Now live: A fully responsive profile. Reducing the weight of our footer.
Related Hot Network Questions. Stack Overflow works best with JavaScript enabled. Accept all cookies Customize settings. MapPath service. GetTemplatePath pathCode ; return base. GetTemplatePath pathCode ; Response.
WriteFile imgPath ; Response. RSolberg RSolberg Add a comment. Active Oldest Votes. I believe you can control this with the content-disposition header.
The Matt 6, 7 7 gold badges 40 40 silver badges 58 58 bronze badges. Aren Aren The content type was needed to force the download as a file. I actually came here because I was looking for the opposite effect. Content "No picture for this program. Paul Totzke Paul Totzke 1, 16 16 silver badges 31 31 bronze badges. MapPath image. The correct way to download file in your case is to use FileResult class. FromStream ms ; image.
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