Member Avatar for kapil.goyal

can anybody tell me how i can upload a file without user interaction.the file full path is known and can be hardcoded.there will be a button on page when user press it the file should be uploaded.

Active-x i sone solution but for that the user have to low down his/her security settings which is not possible in this case.

any solution?

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  • Latest Post Latest Post by sa.ahmadzade

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Short answer: a normal web page cannot upload an arbitrary local file from a known path without the user actively choosing it. That restriction is deliberate — browsers block programmatic selection/upload of local files to prevent pages from stealing local data. This is the same point raised by and ; the input element intentionally prevents scripts from setting its value and hides real paths (C:\fakepath) for security reasons. (developer.mozilla.org)

Practical, browser-safe options are all user-driven. Modern pages can either present a visible file input or use the File System Access API (showOpenFilePicker / getFile) so a single user click opens a picker and returns a File/FileSystemFileHandle that can be uploaded via fetch or XHR. The picker call must be inside a user gesture and requires HTTPS; permission/state is transient and browsers may re-prompt when tabs close. Example (conceptual):

// must run inside a user gesture (click handler)
const [handle] = await window.showOpenFilePicker();
const file = await handle.getFile();
const form = new FormData();
form.append('file', file, file.name);
await fetch('/upload', { method: 'POST', body: form });

The File System Access API provides the power but still enforces user consent and secure contexts. (developer.mozilla.org)

For managed/desktop scenarios (the case mentioned by ), a hosted/native approach is appropriate: a small native agent, a browser extension that uses native messaging, or hosting the page inside a desktop WebBrowser control and letting the host application perform the upload. The host can expose a COM-visible object (ObjectForScripting) so page script calls into app code that reads the known path and posts it to the server — acceptable only in trusted, controlled environments. Example sketch (C#):

[ComVisible(true)]
public class ScriptBridge {
  public void Upload(string path) {
    var bytes = File.ReadAllBytes(path);
    using var client = new HttpClient();
    var content = new MultipartFormDataContent();
    content.Add(new ByteArrayContent(bytes), "file", Path.GetFileName(path));
    client.PostAsync("https://server/upload", content).Wait();
  }
}
// host: webBrowser.ObjectForScripting = new ScriptBridge();

See browser extension native-messaging docs and WebBrowser.ObjectForScripting for implementation details. (developer.chrome.com)

Caution: legacy tricks (ActiveX, Java applets, NPAPI plugins) require lowering security, are browser/OS-specific, and are obsolete for modern web apps — not recommended for new designs. For a long-term, cross-browser solution prefer user-driven file pickers, the File System Access API where available, or a small installed helper where full automation is essential. (learn.microsoft.com)

Recommended Answers

All 5 Replies

Member Avatar for stymiee

You can't. This would be a huge security issue and will never be allowed by a browser.

Member Avatar for davidcairns

Are you actually saying you don't want to use ActiveX to do it? because uploads can be done without that by using an input of type="file" and a form enctype="multipart/form-data".

Doing this yourself is a lot of work but ABCUpload is a server side component for ASP that will do it for you.

Accessing the users drives with just a button is not the kind of behaviour we would wish for in a browser.

Member Avatar for MidiMagic

Security rules require the user to confirm any upload that is not a web page component.

Member Avatar for MidiMagic

Think about it. If this were allowed, then if someone wanted to, he could steal any of the web user's files from his hard disk, using a spoofed button that says it does something else.

THAT is why it is not allowed.

Member Avatar for sa.ahmadzade

VB.NET programming language in Windows
Web browser control
When the page is loaded
There is a file upload control
I want the page loading time,
File upload control to upload a file with a specific path in the system user to select
Click the button to send the user to upload files to be
Namely: Auto Select Path of File in UPLOAD FILE CONTROL For Upload?
Thank you

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