C#实现在应用程序间发送消息的方法示例
本文实例讲述了C#实现在应用程序间发送消息的方法。分享给大家供大家参考，具体如下：
首先建立两个C#应用程序项目。
第一个项目包含一个WindowsForm(Form1),在Form1上有一个Button和一个TextBox。
第二个项目包含一个WindowsForm(Form1),在Form1上有两个Button，分别用来测试第一个应用程序中Button的Click事件和修改第一个应用程序中TextBox的值。
第一个应用程序中Form的代码如下:
usingSystem;
usingSystem.Drawing;
usingSystem.Collections;
usingSystem.ComponentModel;
usingSystem.Windows.Forms;
publicclassForm1:System.Windows.Forms.Form{
privateSystem.Windows.Forms.Buttonbutton1;
privateSystem.Windows.Forms.TextBoxtextBox1;
privateSystem.ComponentModel.Containercomponents=null;
[STAThread]
staticvoidMain(){
Application.Run(newForm1());
}
publicForm1()
{
InitializeComponent();
}
protectedoverridevoidDispose(booldisposing)
{
if(disposing)
{
if(components!=null)
{
components.Dispose();
}
}
base.Dispose(disposing);
}
#regionWindows窗体设计器生成的代码
privatevoidInitializeComponent()
{
this.button1=newSystem.Windows.Forms.Button();
this.textBox1=newSystem.Windows.Forms.TextBox();
this.SuspendLayout();
//
//button1
//
this.button1.Location=newSystem.Drawing.Point(32,24);
this.button1.Name="button1";
this.button1.TabIndex=0;
this.button1.Text="button1";
this.button1.Click+=newSystem.EventHandler(this.button1_Click);
//
//textBox1
//
this.textBox1.Location=newSystem.Drawing.Point(32,64);
this.textBox1.Name="textBox1";
this.textBox1.TabIndex=1;
this.textBox1.Text="textBox1";
//
//Form1
//
this.AutoScaleBaseSize=newSystem.Drawing.Size(6,14);
this.ClientSize=newSystem.Drawing.Size(292,266);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.button1);
this.Name="Form1";
this.Text="Form1";
this.ResumeLayout(false);
}
#endregion
privatevoidbutton1_Click(objectsender,System.EventArgse){
MessageBox.Show("Thisisbutton1click!");
}
}
第二个应用程序中Form的代码如下:
usingSystem;
usingSystem.Text;
usingSystem.Drawing;
usingSystem.Collections;
usingSystem.ComponentModel;
usingSystem.Windows.Forms;
usingSystem.Runtime.InteropServices;
publicclassTestForm1:System.Windows.Forms.Form{
privateSystem.Windows.Forms.Buttonbutton1;
privateSystem.Windows.Forms.Buttonbutton2;
privateSystem.ComponentModel.Containercomponents=null;
[STAThread]
staticvoidMain(){
Application.Run(newTestForm1());
}
publicTestForm1()
{
InitializeComponent();
}
protectedoverridevoidDispose(booldisposing)
{
if(disposing)
{
if(components!=null)
{
components.Dispose();
}
}
base.Dispose(disposing);
}
#regionWindows窗体设计器生成的代码
privatevoidInitializeComponent()
{
this.button1=newSystem.Windows.Forms.Button();
this.button2=newSystem.Windows.Forms.Button();
this.SuspendLayout();
//
//button1
//
this.button1.Location=newSystem.Drawing.Point(32,24);
this.button1.Name="button1";
this.button1.TabIndex=0;
this.button1.Text="button1";
this.button1.Click+=newSystem.EventHandler(this.button1_Click);
//
//button2
//
this.button2.Location=newSystem.Drawing.Point(32,64);
this.button2.Name="button2";
this.button2.TabIndex=0;
this.button2.Text="button2";
this.button2.Click+=newSystem.EventHandler(this.button2_Click);
//
//TestForm1
//
this.AutoScaleBaseSize=newSystem.Drawing.Size(6,14);
this.ClientSize=newSystem.Drawing.Size(292,266);
this.Controls.Add(this.button1);
this.Controls.Add(this.button2);
this.Name="TestForm1";
this.Text="TestForm1";
this.ResumeLayout(false);
}
#endregion
privatevoidbutton1_Click(objectsender,System.EventArgse){
IntPtrhwnd_win;
IntPtrhwnd_button;
hwnd_win=FindWindow("WindowsForms10.Window.8.app3","Form1");
hwnd_button=FindWindowEx(hwnd_win,newIntPtr(0),"WindowsForms10.BUTTON.app3","button1");
constintBM_CLICK=0x00F5;
Messagemsg=Message.Create(hwnd_button,BM_CLICK,newIntPtr(0),newIntPtr(0));
PostMessage(msg.HWnd,msg.Msg,msg.WParam,msg.LParam);
}
privatevoidbutton2_Click(objectsender,System.EventArgse){
constintWM_CHAR=0x0102;
IntPtrhwnd_win;
IntPtrhwnd_textbox;
hwnd_win=FindWindow("WindowsForms10.Window.8.app3","Form1");
hwnd_textbox=FindWindowEx(hwnd_win,newIntPtr(0),"WindowsForms10.EDIT.app3","textBox1");
stringstrtext="测试aaa";
UnicodeEncodingencode=newUnicodeEncoding();
char[]chars=encode.GetChars(encode.GetBytes(strtext));
Messagemsg;
foreach(charcinchars){
msg=Message.Create(hwnd_textbox,WM_CHAR,newIntPtr(c),newIntPtr(0));
PostMessage(msg.HWnd,msg.Msg,msg.WParam,msg.LParam);
}
}
[DllImport("user32.dll")]
publicstaticexternIntPtrFindWindow(stringlpClassName,stringlpWindowName);
[DllImport("user32.dll")]
publicstaticexternIntPtrFindWindowEx(IntPtrhwndParent,IntPtrhwndChildAfter,stringlpszClass,stringlpszWindow);
[DllImport("user32.dll",CharSet=CharSet.Unicode)]
publicstaticexternIntPtrPostMessage(IntPtrhwnd,intwMsg,IntPtrwParam,IntPtrlParam);
}
以上代码可以在VS.NET中编译运行，也可以使用csc.exe编译,如使用一下命令行：
F:>csc.exeForm1.cs F:>csc.exeTestForm1.cs
编译后生成两个.exe文件。
首先运行第一个程序，显示Form1窗体，然后运行第二个程序，显示TestForm1窗体。
在TestForm1窗体上点击button1按钮（向Form1窗体上的button1发送消息）此时显示对话框提示“Thisisbutton1click!”。
在TestForm1窗体上点击button2按钮（向Form1窗体上的textBox1发送消息）此时在Form1上的textBox1上显示“测试aaa”。
更多关于C#相关内容感兴趣的读者可查看本站专题：《WinForm控件用法总结》、《C#窗体操作技巧汇总》、《C#数据结构与算法教程》、《C#常见控件用法教程》、《C#面向对象程序设计入门教程》及《C#程序设计之线程使用技巧总结》
希望本文所述对大家C#程序设计有所帮助。