Like Article. How to trigger a file download when. Welcome to GeeksforGeeks. Download Image. By clicking the download button. Recommended Articles. Article Contributed By :. Easy Normal Medium Hard Expert. GetFolderPath Environment. InternetCache , postedFile. FileName ; postedFile. SaveAs filePath ; docfiles. CreateResponse HttpStatusCode. Now, if we run the project and select a file and click on the upload button it will display the file location in an alert box.
We can check that the file is physically there. Now we will write the code for this download button in the fileuploader. Then we will again call the Web API get method to download the file where we the file name and file extension as parameter. The file download method is as in the following. Open, FileAccess. ReadBytes Int32 fs. Length ; br. Close ; fs. OK ; System. Then return the byte content as a HttpResponseMessage to the browser so that the browser can download that file directly.
The following is the complete code of the Fileuploader. NET allows us to upload a file of a maximum size of 4 MB. If we want to upload a larger file then we need to change the web.
You can do it with "trick" with invisible iframe. When you set "src" to it, browser reacts as if you would click a link with the same "href". As opposite to solution with form, it enables you to embed additional logic, for example activating download after timeout, when some conditions are met etc. Documented in Bootstrap 4 docs , and works in Bootstrap 3 as well.
I hade a case where my Javascript generated a CSV file. Since there is no remote URL to download it I use the following implementation. In my testing the following works for all file types and browsers as long as you use a relative link:. I noticed there were comments under a lot of the answers that said the browser would just try to open the file itself rather than downloading it depending on the file type. I discovered this to be true. This is what finally worked for me since the file to be downloaded was determined when the page is loaded.
If you can't use form, another approach with downloadjs fit nice. Downloadjs use blob and html 5 file API under the hood:. One of the simplest way for button and the text-decoration will help to alter or to remove the text decoration of the link.
Another way of doing in case you have a complex URL such as file. The solution I have come up with is that you can use download attribute in anchor tag but it will only work if your html file is on the server.
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. Asked 9 years, 4 months ago. Active 27 days ago. Viewed 1. Improve this question. Brett DeWoody 53k 27 27 gold badges silver badges bronze badges.
Thanks to you "how to trigger a file download in javascript" would give answers much faster for any future searcher. Your restrictions in your final paragraph don't make much sense to me. If you're open to answers that use JavaScript since you say so or that require changing the DOM structure like the one you've accepted , why not also an anchor styled as a button? I can't imagine a scenario where the first two would be fine but the anchor as a button would be problematic. Add a comment.
Active Oldest Votes. You can trigger a download with the HTML5 download attribute. That means the page and the file must share the same domain, subdomain, protocol HTTP vs. HTTPS , and port if specified. Exceptions are blob: and data: which always work , and file: which never works.
If it is blank, the browser defaults to the file's name. Improve this answer. MultiplyByZer0 4, 3 3 gold badges 28 28 silver badges 46 46 bronze badges. Then, paste the URL and press Enter. You can similarly link an image, button, or any other element so that when the reader clicks on it, the download is triggered automatically.
This way we can link various file types with different elements to create downloadable files with WordPress. You can use them to share images, documents, guides, infographics, templates, and other useful resources with your visitors. If you have any doubt about the process above, reach out to us in the comments below. Check the video below:. Hey Fardeen, the video at the end of the blog may help.
Nice tutorial!
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