Hey everyone, I’m stuck and could use some help. I used to call C# DLL functions with ActiveX in JavaScript on Firefox. But the new Firefox doesn’t support ActiveX anymore. Now I’m trying to make a plugin that works on different browsers like Chrome and Firefox.
Does anyone know how I can call DLL functions from a local file using JavaScript? I’m looking for a way that works across browsers.
I’ve tried googling but haven’t found anything that fits my needs. Any ideas or suggestions would be really helpful. Thanks in advance!
have u considered using webassembly? it lets u run c# code directly in browser. u could compile ur dll to wasm and call it from js. it works on most modern browsers. might be worth checking out if u want cross-browser compatibility without needing a separate server.
From my experience, directly calling DLL functions from JavaScript across browsers isn’t feasible due to security restrictions. A more practical approach would be to create a local WebSocket server that interfaces with your DLL. This server can be built using Node.js with a native module to interact with the C# DLL.
Your JavaScript code would then connect to this WebSocket server to indirectly access the DLL functions. This method works consistently across modern browsers and provides real-time communication. It’s also more secure than exposing DLL functions directly to the browser.
Remember to implement proper error handling and security measures in your WebSocket server. While this solution requires some initial setup, it offers a robust, cross-browser compatible way to leverage your C# DLL functionality from web applications.
I’ve faced similar challenges in the past, and I can tell you it’s not an easy task. Browser security restrictions make it nearly impossible to directly call local DLL functions from JavaScript across different browsers.
Instead, I’d recommend creating a small local web service or API that exposes the DLL functionality. You can use something like ASP.NET Core to build this service, which can then interact with your DLL. Your JavaScript code would make HTTP requests to this local service to indirectly access the DLL functions.
This approach has worked well for me in cross-browser scenarios. It’s more secure and maintainable than trying to directly access DLLs from the browser. Plus, it gives you the flexibility to potentially move some of that functionality to a remote server in the future if needed.
Keep in mind you’ll need to handle things like CORS and potentially add some basic authentication to your local service. It’s a bit more work upfront, but it’s a much more robust solution in the long run.