WasmWinforms

Winforms now work in your browser! WasmWinforms is a nuget package that you can install and use your EXACT same code designed for winforms and you get can run it on your browser

Try it online

https://webassembly.z19.web.core.windows.net/ some random controls doing nothing!
https://webassembly.z19.web.core.windows.net/Calculator/ demo from https://code.msdn.microsoft.com/windowsdesktop/Simple-Calculator-54ec8e4a

How to use

Create a Winforms application from Visual Studio. Note that winforms are full .Net applications.
Create an empty .Net Core App and add files from full .net application into it. For example, add Form1.cs,Form1.Designer.cs, Form1.resx, Program.cs .You can add those files as links too.
Install latest version of Winforms.Wasm nuget from nuget.org.
Build your project.
You can debug Win32 (32bit version) of your code in Visual Studio. (Make sure you have 32bit version of dotnet installed! (it should be in Program Files (x86)\dotnet\dotnet.exe)
Looking at your OUTPUT DIRECTORy\dist\ you will find your index.html to run!

How it works

This project uses mono to run your C# IL code. Also coming with this distribution are System.Drawing and System.Windows.Forms. Winforms implementation required many other c libraries that I also ported all of them into WebAssembly. You can find out about them looking into their submodules!

How to compile/build

This project uses another amazing ( :D ) project of mine: GCCBuild which enables you to use any compiler to compile C/C++ code. Meaning you can have Visual Studio C/C++ project files and use them to compile both for Windows/Linux and also WebAssembly. You need to have Emscripten installed, activated and already accessible from your path. First from Visual Studio build for Release-x86 then build for WasmRel-x86. This way you have all libraries compiled for Win32 and also WebAssembly. Using Win32 compiled libraries are way easier to debug and run your applcation.

Please note that compiling mono-wasm should only be done in WasmRel or WasmDbg targets and it would take a minute or two to complete!

Why is it so slow/buggy?

File issues and submit pull request so it will be faster/less buggy! There are many many bugs and this project/product is not at all recommended for production. It is pre-alpha phase!

We have many better UI frameworks for browsers and web, why use Winforms?!

Well that is a really good question. I dont know. It was fun doing this thing. Maybe call it some useless technology...