C＃WPF项目不能称之为F＃库 [英] C# WPF Project cannot call F# library

问题描述

最近我花了2周的沉寂，从我目前的项目写一个体面的大小文件分析器和一个数字错误检查。我决定把它们写在F＃踢和笑声。意想不到的决定。

Recently I took a 2 week hiatus from my current project to write a decent sized file parser and a numerical error checker. I decided to write them in F# for kicks and giggles. Fantastic decision.

VB编写的程序的旧版本是1000线;我在F＃中管理其在170。真棒。

The older version of the program written in VB was over 1000 lines; I managed it in 170 in F#. Awesome.

我回到了我当前的项目现在想将一个F＃lib中做了一些分析，也许写入/读取XML保存文件。但我似乎无法弄清楚如何从一个C＃WPF应用程序为我的生活调用F＃库。

I'm back on my current project now and want to incorporate an F# lib to do some parsing and maybe writing/reading an XML save file. But I cannot seem to figure out how to call an F# library from a C# WPF application for the life of me.

我使用Microsoft Visual 2010专业版，这里就是我试图迄今引用这篇文章：的 http://www.devjoy.com/2013/02/c-to-f-interop-sharing-a-domain-model/ 和一对夫妇SO帖子：

I'm using Microsoft Visual 2010 Professional, here's what I've attempted thus far referencing this article: http://www.devjoy.com/2013/02/c-to-f-interop-sharing-a-domain-model/ and a couple SO posts:

1. 创建一个WPF项目。
2. 在增加了一个F＃库项目的解决方案。
3. 添加引用到F＃库的C＃通过项目：在SolutionExplorer右键点击项目文件，单击添加引用，选择MyFSharpLib从项目选项卡，然后单击添加

4. 然后添加一些测试code到默认的F＃文件module1.fs：

1. Create a WPF project.
2. Added an F# library project to the solution.
3. Added a reference to the F# library to C# project via: Right click project file in SolutionExplorer, click 'Add Reference', selected 'MyFSharpLib' from projects tab and click Add.

4. I then added some test code to the default F# file module1.fs:

module Module1

let Add a b = a + b

和试图从C＃调用它：

And tried to call it from C#:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication2
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
    InitializeComponent();
}

// Call F# library
private void Button_Click(object sender, RoutedEventArgs e)
{
    int a = Module1.Add(1, 2);
}
}
}

这将导致一个错误说：

我认为这个问题是与组件。我注意到，在我见过的有使用Microsoft.FSharp.Core 一对夫妇code样本。这是我痛苦的根源？我试着将它添加，但没有找到它在.NET选项卡下。

I think the problem is with the assemblies. I noticed in a couple code samples I've seen have using Microsoft.FSharp.Core. Is this the source of my grief? I tried adding it and couldn't find it under the .NET tab.

这是推动我疯了，任何帮助将是非常美联社preciated。

This is driving me crazy, any help would be much appreciated.

推荐答案

看来你找到了答案已经 - 构建F＃项目 - 但我会提供一个答案（为后人），以一个问题，这将几乎完全一样的症状，但不同的根本原因。

It seems you found the answer already -- building the F# project -- but I'm going to provide an answer (for posterity) to a problem which would have almost the exact same symptoms, but a different underlying cause.

如果您所提供的完全使用例如F＃code，即用一个简单的名称的模块（没有命名空间），重要的是要知道，你需要使用全球访问从C＃的F＃模块时的关键字。例如，这是怎么了，你不得不给你打电话从C＃中定义的添加功能：

If you use your example F# code exactly as provided, that is, a module with a simple name (without a namespace), it's important to know that you need to use the global keyword when accessing the F# module from C#. For example, this is how you'd have to call the Add function you defined from C#:

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            var result = global::MyModule.Add(1, 2);
        }
    }
}

除非你有特别的理由不，它通常只是一个更好的主意，用一个命名空间的模块，例如，模块MyNamespace.Module1 。

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