[置顶] MFC中调用WPF教程

呵呵,  这几天看到社区里大家对如何在vc中调用WPF兴致很高, 现在我就带领大家按部就班来实现它.废话不说了, 开始.

WPF是微软主推的新一代桌面程序开发技术, 它极大加快了程序界面开发,也增强了界面的用户体验,至于详细的介绍大家可以google,  本文主要还是介绍如何在vc中处理wpf数据和事件.开发工具嘛vs2008+sp1+[Blend].

1.新建一个项目MFCHostWpf, 建立2个工程, 一个为vc对话框的工程MFCDlgDemo,另一个为C#普通应用程序的工程WPFDemo.如图所示:

2.分别运行2个工程后, 程序截图如下:

3.修改WPF工程以便MFC工程调用, 具体如下:

1.删除WPF工程中的 App.xaml和App.xaml.cs两个源文件.

2.双击WPF工程的Properties(属性), 选择Application(应用程序)选项卡, 将Output type(输出类型)下拉框选为Class Library(类库). 保存后关闭. 如图所示:

4.接下来修改MFC工程以便调用WPF组件, 具体如下:

1.右击MFC工程, 选择弹出菜单的Properties(属性), 在Configuration Properties/General/Common Language Runtime support中选择Common Language Runtime support(/clr), 保存关闭后按F7编译. 如图所示:

2.重新右击MFC工程, 选择"工程属性", 在Common Properties中, 点击"Add New Reference", 在".net"选项卡下添加如下引用PresentationCore, PresentationFramework, System, System.Core, Systems.Data, Systems.Data.DataSetExtensions, Systems.Xml, System.Xml.Linq, WindowsBase. (p.s. 具体引用一定要和WPF工程中的引用一致),保存后退出, 如图所示:

3.重新选择"工程属性", 在Common Properties中, 点击"Add New Reference", 在"Project"选项卡下选择WPFDemo工程, 选择"Ok"后保存退出, 如图所示:

4.建立一个CLI类CHostWPFWnd, 代码如下:

//HostWPFWnd.h #pragma once  using namespace System; using namespace System::Windows; using namespace System::Windows::Interop; using namespace System::Runtime; using namespace WPFDemo;  public ref class CHostWPFWnd { public: 	CHostWPFWnd(void){}; 	~CHostWPFWnd(void){}; protected: 	!CHostWPFWnd(){};  public: 	static Window1^ hostedWnd; 	static HWND hWnd; };  HWND GetHwnd(HWND hwnd = NULL);   //HostWPFWnd.cpp  #include "StdAfx.h" #include "HostWPFWnd.h"  HWND GetHwnd(HWND hwnd)  { 	CHostWPFWnd::hostedWnd = gcnew Window1();  	WindowInteropHelper^ wih = gcnew WindowInteropHelper(CHostWPFWnd::hostedWnd); 	wih->Owner = IntPtr(hwnd); 	CHostWPFWnd::hWnd = (HWND) wih->Handle.ToPointer();  	return CHostWPFWnd::hWnd; }

5.在MFC工程的App文件CMFCHostWpfApp中添加CLI类的引用#include "HostWPFWnd.h", 在App的InitInstance函数里, 修改如下代码:

CMFCHostWpfDlg dlg;     m_pMainWnd = &dlg;     INT_PTR nResponse = dlg.DoModal();     if (nResponse == IDOK)     {         // TODO: Place code here to handle when the dialog is         //  dismissed with OK     }     else if (nResponse == IDCANCEL)     {         // TODO: Place code here to handle when the dialog is         //  dismissed with Cancel     }

为:

::GetHwnd();     if (CHostWPFWnd::hostedWnd)     {         CHostWPFWnd::hostedWnd->ShowDialog();     }

6.通过以上5步, 我们已经成功在MFC工程调用WPF, 按F7编译后, F5运行, 效果如下:

ok, 相信细心的哥们已经发现这个运行出来的Dlg的程序图标已经换为咱们熟悉的MFC默认icon. O(∩_∩)O~. (p.s. 注意启动的是MFC工程, 应将MFCDemo设为首选项, 具体是右击MFCDemo, 选择Set as StartUp Project).

7.接下来, 我们在WPF工程中定义一个实现INotifyPropertyChanged 接口的类TestModel, 里面有个int字段TestValue, 添加一个Button和一个TextBox, 并添加一个Click事件, 具体代码如下:

//cs

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;  using System.ComponentModel;  namespace WPFDemo {     /// <summary>     /// Interaction logic for Window1.xaml     /// </summary>     public partial class Window1 : Window     {         public class TestModel : INotifyPropertyChanged         {             public TestModel()             {             }              private int _testValue = 0;              public int TestValue             {                 get { return _testValue; }                 set                 {                     _testValue = value;                     OnPropertyChanged("TestValue");                 }             }              // Declare the event             public event PropertyChangedEventHandler PropertyChanged;              // Create the OnPropertyChanged method to raise the event             protected void OnPropertyChanged(string name)             {                 PropertyChangedEventHandler handler = PropertyChanged;                 if (handler != null)                 {                     handler(this, new PropertyChangedEventArgs(name));                 }             }         }          public Window1()         {             InitializeComponent();         }          private TestModel test;          public TestModel Test         {             get { return test; }             set { test = value; }         }          public delegate void ButtonClickHandler();         public event ButtonClickHandler ClickEvent;          private void _btnTest_Click(object sender, RoutedEventArgs e)         {             //             ClickEvent();         }     }  } 

//xaml

<Window x:Class="WPFDemo.Window1"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     Title="Window1" Height="300" Width="300">     <Grid>         <TextBox Height="23" HorizontalAlignment="Left" Margin="10,10,0,0" Name="_txtValue" VerticalAlignment="Top"

          Width="120" />         <Button Height="23" Margin="136,10,67,0" Name="_btnTest" VerticalAlignment="Top" Click="_btnTest_Click">Test

        </Button>     </Grid> </Window> 

 

8.这一步我们把_txtValue的Text属性绑定到我们上面定义的TestValue字段, 把_txtValue设为ReadOnly, 并修正下Dlg显示出来的位置, 修改后的xaml代码为:

<TextBox Height="23" HorizontalAlignment="Left" Margin="10,10,0,0" Name="_txtValue" VerticalAlignment="Top" Width="120" 

  Text="{Binding Test.TestValue, ElementName=window, Mode=OneWay}" IsReadOnly="True" /> 

运行效果如图:

9.接下来我们自定义一个event, 在Button的Click事件中触发此事件, 具体代码如下:

public delegate void ButtonClickHandler();       public event ButtonClickHandler ClickEvent;        private void _btnTest_Click(object sender, RoutedEventArgs e)       {           //           ClickEvent();       }

10.然后我们在MFC通过自定义一个Add方法, 并在方法中通过CLI修改WPF中的TextValue字段, 然后通过CLI把此Add方法加到自定义event中. 修改后代码如下:

//HostWPFWnd.h #pragma once  using namespace System; using namespace System::Windows; using namespace System::Windows::Interop; using namespace System::Runtime; using namespace WPFDemo;  public ref class CHostWPFWnd { public:     CHostWPFWnd(void){};     ~CHostWPFWnd(void){}; protected:     !CHostWPFWnd(){};  public:     static Window1^ hostedWnd;     static HWND hWnd; };  HWND GetHwnd(HWND hwnd = NULL); void Add(); //Increase TestValue;

//HostWPFWnd.cpp  #include "StdAfx.h" #include "HostWPFWnd.h"  HWND GetHwnd(HWND hwnd)  {     CHostWPFWnd::hostedWnd = gcnew Window1();      CHostWPFWnd::hostedWnd->ClickEvent += gcnew Window1::ButtonClickHandler(Add);       WindowInteropHelper^ wih = gcnew WindowInteropHelper(CHostWPFWnd::hostedWnd);     wih->Owner = IntPtr(hwnd);     CHostWPFWnd::hWnd = (HWND) wih->Handle.ToPointer();      return CHostWPFWnd::hWnd; }  

void Add() {     CHostWPFWnd::hostedWnd->Test->TestValue++; }

11.F7编译后, F5运行, 结果如下:

ok, 通过本文相信大家都了解了如何在MFC中调用WPF, 有什么问题欢迎大家和我讨论.

工程附件:MFCHostWPF