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WPF 进程间通讯----inter-process communication
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进程间通讯--inter-process communication
进程间相互通讯的方法有很多,如用web services,xml 等互相读取, 网络的可以使用socket 等.
2个WinForm程序相互通讯可以使用重写WndProc的方法,而WPF则不能。
先看如图效果：
首先新建一个空白解决方案IPC
新建一个WPF项目命名为AppA
我们只需要点击AppA中的button后AppB会提示已经点击即可,
项目A的窗体XAML代码：
<Window x:Class="IPC.AppA.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="App A" Height="350" Width="525">
<Grid>
<Button Name="btnOK" Content="Button" HorizontalAlignment="Left" Margin="202,135,0,0" VerticalAlignment="Top" Width="75"/>
</Grid>
</Window>
项目A的后置代码：
public partial class MainWindow : Window
{ [DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern bool PostMessage(int hhwnd, uint msg, IntPtr wparam,
IntPtr lparam);
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern uint RegisterWindowMessage(string lpString);
private string msgstr = "inter-process communtcation";
private uint msg;
private const int HWND_BROADCAST = 0xffff; public MainWindow()
{
InitializeComponent();
this.btnOK.Click += (s, e) => {
this.Dispatcher.Invoke(delegate
{
PostMessages();
});
};
} protected void PostMessages()
{
msg = RegisterWindowMessage(msgstr);
if (msg == )
{
MessageBox.Show(Marshal.GetLastWin32Error().ToString());
}
PostMessage(HWND_BROADCAST, msg, IntPtr.Zero, IntPtr.Zero);
}
如下是项目B的窗体代码：
<Window x:Class="IPC.AppB.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="App B"
Height="350"
Width="525">
<Grid>
<Button Name="btnOK" Content="0" HorizontalAlignment="Left" Margin="230,132,0,0" VerticalAlignment="Top" Width="75"/>
</Grid>
</Window>
项目B的后置代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Interop;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes; namespace IPC.AppB
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
private MainWindow _instance;
private object _lock = new object();
private string msgtext = "inter-process communtcation";
private uint msg;
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern uint RegisterWindowMessage(string lpString); public MainWindow()
{
InitializeComponent(); this.Loaded += (s, e) => {
Load();
}; //this.btnOK.Click += (s, e) => {
// MessageBox.Show("AppB's button is clicked.");
//};
} public MainWindow Instance
{
get
{
lock (_lock)
{
if (_instance == null)
{
_instance = new MainWindow();
}
return _instance;
}
}
} protected void Load()
{
MainWindow main = Instance;
main.Dispatcher.Invoke(delegate {
msg = RegisterWindowMessage(msgtext);
if (msg == )
{
MessageBox.Show(Marshal.GetLastWin32Error().ToString());
}
});
} int i = ;
protected void PromptMsgs()
{
this.Dispatcher.Invoke(new Action(delegate
{
btnOK.Click += (s, e) =>
{
//do nothing..
}; this.btnOK.Content = (++i).ToString(); MessageBox.Show("AppB's button is clicked.");
}));
} protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e); HwndSource sorce = PresentationSource.FromVisual(this) as HwndSource;
sorce.AddHook(new HwndSourceHook(WndProc));
} private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (msg == this.msg)
{
PromptMsgs();
}
return IntPtr.Zero;
} protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
{
base.OnClosing(e);
Environment.Exit();
}
}
}
需要代码的朋友请留言！
源码
