如何使用Mono WebAssembly在浏览器中运行简单的.NET方法? [英] How do I use Mono WebAssembly to run a simple .NET method in browser?

问题描述

假设我在服务器上有一个.NET dll文件，该文件具有以下简单类:

Let's say I have a .NET dll file on the server, that has this simple class:

public static class C {
    public static int Add(int a, int b) => a + b;
}

我想使用Mono的WebAssembly支持在浏览器中调用C.Add.
(假设我可以将dll下载到浏览器中，例如使用fetch)

I want to invoke C.Add in browser using Mono's WebAssembly support.
(assume that I can download the dll into browser, e.g. with fetch)

问题:

1. Mono需要什么.js/.wasm文件，我从哪里得到这些文件?
2. 一旦所有内容加载完毕，我该如何从JS中调用C.Add?

我检查了npm，但在那里没有找到Mono WASM.

I checked npm but I haven't found Mono WASM there.

注意:我已经有一个dll，所以我对WASM IL解释器感兴趣，而不对WASM AOT构建感兴趣.

Note: I already have a dll, so I'm interested in WASM IL interpreter and not WASM AOT build.

推荐答案

这就是我发现的东西.

• 此处描述了步骤:文档/入门/获取-wasm-sdk.md
• 简短摘要:您必须从Jenkins下载并解压缩版本

• The steps are described here: docs/getting-started/obtain-wasm-sdk.md
• Short summary: you have to download and unpack a build from Jenkins

我们将打开的文件夹称为WASM-SDK.

Let's call the unpacked folder WASM-SDK.

注意:如果您按照Mono文档中的说明运行packager.exe，则可以跳过以下步骤，但是我想在此处描述手动方法，以便更好地理解.

Note: you can skip following steps if you run packager.exe as described in Mono docs, but I want to describe the manual approach here for better understanding.

在站点根目录下放置以下dll(在managed文件夹下说):

Put the following dlls under your site root (lets say under managed folder):

• 包含class C的主dll，我们称其为app.dll
• BCL依赖性，在这种情况下，您只需要:

• Main dll that contains class C, let's call it app.dll
• BCL dependencies, in this case you only need:

1. WASM-SDK\wasm-bcl\wasm\mscorlib.dll
2. WASM-SDK\wasm-bcl\wasm\Facades\netstandard.dll
3. WASM-SDK\framework\WebAssembly.Bindings.dll

1. WASM-SDK\wasm-bcl\wasm\mscorlib.dll
2. WASM-SDK\wasm-bcl\wasm\Facades\netstandard.dll
3. WASM-SDK\framework\WebAssembly.Bindings.dll

1. 从站点根目录下的WASM-SDK\release复制mono.js和mono.wasm
2. 注册您的Module并导入mono.js:

1. Copy mono.js and mono.wasm from WASM-SDK\release under your site root
2. Register your Module and import mono.js:

<script>
window.Module = {};
window.Module.onRuntimeInitialized = () => {
   const config = {
       vfsPrefix: "managed",
       deployPrefix: "managed",
       enableDebugging: 0
   };
   const assemblies = [
       'app.dll',
       'mscorlib.dll',
       'WebAssembly.Bindings.dll',
       'netstandard.dll'
   ];
   MONO.mono_load_runtime_and_bcl(
       config.vfsPrefix,
       config.deployPrefix,
       config.enableDebugging,
       assemblies,
       () => {
          Module.mono_bindings_init("[WebAssembly.Bindings]WebAssembly.Runtime");
          const add = Module.mono_bind_static_method("[app] C:Add");

          // ⬇️ This is what calls C.Add():
          console.log('C.Add:', add(1, 2));
       }
   )
};
<script>
<script async src="mono.js"></script>

1. 如果使用IIS，请确保.wasm扩展名存在application/wasm mime类型寄存器.

1. If using IIS, make sure that there is a application/wasm mime type register for the .wasm extension.

全部完成

现在，一旦打开HTML，您应该会在浏览器控制台中看到C.Add: 3登录.

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