InvokeMember "click" ;. Improve this answer. VladL VladL WebBrowser control has a "Download file" event you can handle. Odys Odys 8, 9 9 gold badges 64 64 silver badges bronze badges. All you need is : Figure out how to authenticate correctly to the server.
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Now live: A fully responsive profile. Reducing the weight of our footer. Posted Feb am Member Updated Nov am Afzaal Ahmad Zeeshan. Add a Solution. Top Rated Most Recent. Accept Solution Reject Solution. Sleep ; SendKeys. SetApartmentState ApartmentState. MTA ; th. Start ;. Posted Nov am Member Add your solution here. OK Paste as. Treat my content as plain text, not as HTML. When I drop this URL directly into the browser, the file properly downloads. So why doesn't it work on the hyperlink?
I also tried setting the property on a static hyperlink. Same result. Because you are making an HttpHandler as per the comments this is how you would set the NavigateUrl:. If you blindly take the value and use it to read the file from your file system, a hacker can use the same technique to download ANY file from your server, at least, within your application folder. If you decide to go with the HttpHandler option, you are going to have to create some sort of unique token whereby you associate the token to the physical path to the file on disk.
If this is a hyperlink that only needs to be generated once and for the life of the session, you can do something like this:. Of course, the hyperlink is only valid while the Session is still active. If you need to maintain the hyperlink forever, you need to implement this entirely different. This is more secure because the chances of the token not being unique are very very slim. Also because it only stores the token in the Session, so if another user manages to "guess" a token or try a brute-force approach, he still won't get anything since the value simply is not on his Session but on someone else's.
Finally got this to work. I used a relative path,. I have documented the ASHX method for the next sprint. 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. At first, implement the JavaScript function that receives the download URL and file name, and that downloads form the URL to a file with a specified file name, like this.
No way transfers the byte array from inside of the Blazor app to JavaScript natively. Instead, the byte array inside of the Blazor app is converted base64 encoded string by JavaScript interop feature of the Blazor runtime, before pass it to a JavaScript function.
After thinking these considerations points, I implemented the JavaScript helper function, like this:. After implemented this JavaScript helper function, we can invoke it from C code in the Blazor app, like this:. However, please remember these implementations are very inefficient.
Because these implementations cause duplicating source byte array many times. If you know more efficiently implementation, please feel free to get in touch with me, and let's share the technic. One thing I don't get - why would you want to use Blazor when at the end you write helpers in JavaScript and consume them inside Blazor?
This article is not describing the whole of Blazor. This article is only about "getting users to download content", which is a very limited scoped topic. Blazor is undoubtedly one of the strongest options for implementing SPAs for those who benefit from the development environment surrounding C and C. The advantages of Blazor need to be understood as an overall application development ecosystem, including robust and easily understood package dependency management, reuse of existing. NET library assets, etc.
It's true that in some cases, as discussed in this article, we may need the help of JavaScript to implement the "let the content download" feature.
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