Windows 8 C#调用C++编写的Windows运行时组件

Windows运行时组件是Windows 8里面通用的公共库，它可以使用C++，C#或者VB来编写，不过你的Windows 8 metro是用什么语言编写都可以调用无缝地调用Windows运行时组件。

下面通过一个C#编写的Windows 8项目来调用一个用C++编写的Windows运行时组件。

创建一个Windows运行时组件：

编写如下的代码：

#include "pch.h"
#include "WinRTComponent.h"

using namespace CppWinRTComponentDll2;

int CalculatorSample::Add(int x, int y)
{
    return x+y;
}

 头文件

#pragma once

using namespace Windows::Foundation;

namespace CppWinRTComponentDll2
{

    public ref class CalculatorSample sealed
    {
    public:
        int Add(int x, int y);

    };
}

在C#编写的项目中调用Windows运行时组件的C++方法

添加Windows运行时组件

UI部分

<Page
    x:Class="TestWinRTCSDemo.MainPage"
    IsTabStop="false"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:TestWinRTCSDemo"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
        <StackPanel>
            <TextBox x:Name="txtX" HorizontalAlignment="Center" Height="45" Width="258"></TextBox>
            <TextBlock   Text="+" HorizontalAlignment="Center"  Height="45" Width="258" FontSize="14" FontWeight="Bold"/>
            <TextBox x:Name="txtY" HorizontalAlignment="Center" Height="45" Width="258"></TextBox>
            <Button Content="调用WinRT方法来相加" HorizontalAlignment="Center" Click="Button_Click_1" ></Button>
            <TextBox x:Name="txtAddResult" HorizontalAlignment="Center" Height="45" Width="258"/>
        </StackPanel>
    </Grid>
</Page>

C#代码部分

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using CppWinRTComponentDll2;//引入Windows运行时的空间

namespace TestWinRTCSDemo
{

    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
        }

        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            if (txtX.Text != "" && txtY.Text != "")
            {
                 CalculatorSample calcobj =  new  CalculatorSample();//直接创建Windows运行时里面的对象，很方便
                 int x = Convert.ToInt32(txtX.Text.ToString());
                 int y = Convert.ToInt32(txtY.Text.ToString());
                 txtAddResult.Text = calcobj.Add(x,y).ToString();//调用Windows运行时里面的方法
            }
        }
    }
}

运行的效果