本文實(shí)例講述了C#實(shí)現(xiàn)在應(yīng)用程序間發(fā)送消息的方法。分享給大家供大家參考，具體如下：
首先建立兩個(gè)C#應(yīng)用程序項(xiàng)目。
第一個(gè)項(xiàng)目包含一個(gè)Windows Form(Form1),在Form1上有一個(gè)Button和一個(gè)TextBox。
第二個(gè)項(xiàng)目包含一個(gè)Windows Form(Form1),在Form1上有兩個(gè)Button，分別用來(lái)測(cè)試第一個(gè)應(yīng)用程序中Button的Click事件和修改第一個(gè)應(yīng)用程序中TextBox的值。
第一個(gè)應(yīng)用程序中Form的代碼如下:
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
public class Form1 : System.Windows.Forms.Form {
private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
private System.ComponentModel.Container components = null;
[STAThread]
static void Main() {
Application.Run(new Form1());
}
public Form1()
{
InitializeComponent();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗體設(shè)計(jì)器生成的代碼
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(32, 24);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "button1";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(32, 64);
this.textBox1.Name = "textBox1";
this.textBox1.TabIndex = 1;
this.textBox1.Text = "textBox1";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
private void button1_Click(object sender, System.EventArgs e) {
MessageBox.Show("This is button1 click!");
}
}
第二個(gè)應(yīng)用程序中Form的代碼如下:
using System;
using System.Text;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Runtime.InteropServices;
public class TestForm1 : System.Windows.Forms.Form {
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.ComponentModel.Container components = null;
[STAThread]
static void Main() {
Application.Run(new TestForm1());
}
public TestForm1()
{
InitializeComponent();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗體設(shè)計(jì)器生成的代碼
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(32, 24);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "button1";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(32, 64);
this.button2.Name = "button2";
this.button2.TabIndex = 0;
this.button2.Text = "button2";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// TestForm1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.Add(this.button1);
this.Controls.Add(this.button2);
this.Name = "TestForm1";
this.Text = "TestForm1";
this.ResumeLayout(false);
}
#endregion
private void button1_Click(object sender, System.EventArgs e) {
IntPtr hwnd_win ;
IntPtr hwnd_button ;
hwnd_win = FindWindow("WindowsForms10.Window.8.app3","Form1");
hwnd_button = FindWindowEx(hwnd_win ,new IntPtr(0) ,"WindowsForms10.BUTTON.app3","button1");
const int BM_CLICK = 0x00F5;
Message msg = Message.Create(hwnd_button ,BM_CLICK ,new IntPtr(0),new IntPtr(0));
PostMessage(msg.HWnd ,msg.Msg ,msg.WParam ,msg.LParam);
}
private void button2_Click(object sender, System.EventArgs e) {
const int WM_CHAR = 0x0102;
IntPtr hwnd_win ;
IntPtr hwnd_textbox ;
hwnd_win = FindWindow("WindowsForms10.Window.8.app3","Form1");
hwnd_textbox = FindWindowEx(hwnd_win ,new IntPtr(0) ,"WindowsForms10.EDIT.app3","textBox1");
string strtext = "測(cè)試aaa";
UnicodeEncoding encode = new UnicodeEncoding();
char[] chars = encode.GetChars(encode.GetBytes(strtext));
Message msg ;
foreach (char c in chars ) {
msg = Message.Create(hwnd_textbox ,WM_CHAR ,new IntPtr(c),new IntPtr(0));
PostMessage(msg.HWnd ,msg.Msg ,msg.WParam ,msg.LParam);
}
}
[DllImport("user32.dll")]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("user32.dll")]
public static extern IntPtr FindWindowEx(IntPtr hwndParent,IntPtr hwndChildAfter,string lpszClass,string lpszWindow);
[DllImport("user32.dll",CharSet=CharSet.Unicode)]
public static extern IntPtr PostMessage(IntPtr hwnd,int wMsg,IntPtr wParam,IntPtr lParam);
}
以上代碼可以在VS.NET中編譯運(yùn)行，也可以使用csc.exe編譯,如使用一下命令行：
F:>csc.exe Form1.cs
F:>csc.exe TestForm1.cs
編譯后生成兩個(gè).exe文件。
首先運(yùn)行第一個(gè)程序，顯示Form1窗體，然后運(yùn)行第二個(gè)程序，顯示TestForm1窗體。
在TestForm1窗體上點(diǎn)擊button1按鈕（向Form1窗體上的button1發(fā)送消息）此時(shí)顯示對(duì)話框提示“This is button1 click!”。
在TestForm1窗體上點(diǎn)擊button2按鈕（向Form1窗體上的textBox1發(fā)送消息）此時(shí)在Form1上的textBox1上顯示“測(cè)試aaa”。
更多關(guān)于C#相關(guān)內(nèi)容感興趣的讀者可查看本站專題：《WinForm控件用法總結(jié)》、《C#窗體操作技巧匯總》、《C#數(shù)據(jù)結(jié)構(gòu)與算法教程》、《C#常見(jiàn)控件用法教程》、《C#面向?qū)ο蟪绦蛟O(shè)計(jì)入門(mén)教程》及《C#程序設(shè)計(jì)之線程使用技巧總結(jié)》
希望本文所述對(duì)大家C#程序設(shè)計(jì)有所幫助。
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