c# 两个exe如何传递参数?
我有两个exe都在运行中,分别为a.exe和b.exe
当点击a.exe的一个按钮时,需要给b.exe传递一个参数
怎么传呢?穿过去b.exe中怎么接收呢?
[解决办法]
不如把a做成dll吧..
[解决办法]
如果用a.exe去启动b.exe的话,可以使用
System.Diagnostics.Process.Start(b.exe","这里是要传过去的参数");
[解决办法]
SendMessagae
WM_COPYDATA
[解决办法]
这个就要看楼主的具体需求了，我提供一个思路吧
1。如果是在a.exe中的某按钮点击时启动b.exe,则可以通过process进程类的argumens直接传递；
2。若是两个exe都在运行过程中，则楼主所说的情况就是常见的两个进程之间互相通信的情况了。对于这个我常常是用windows api来实现，就是在a.exe中调用findWindow与sendMessage两个api函数来发送相应的消息，而b.exe重写窗口的消息处理方法来对消息进行判断处理
[解决办法]
第一个项目包含一个Windows Form(Form1),在Form1上有一个Button和一个TextBox。
第二个项目包含一个Windows Form(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:
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 窗体设计器生成的代码
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!");
}
}
第二个应用程序中Form的代码如下:
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 窗体设计器生成的代码
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 = "测试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.exe Form1.cs
F:>csc.exe TestForm1.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“This is button1 click!”。
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”。
[解决办法]
发送端
public struct CopyDataStruct
{
public IntPtr dwData;
public int cbData;
[MarshalAs(UnmanagedType.LPStr)]
public string lpData;
}
[DllImport("User32.dll")]
public static extern int SendMessage(int hWnd, uint Msg, int wParam, ref CopyDataStruct lParam);
private const int WM_COPYDATA = 0x004A;
[DllImport("User32.dll")]
private static extern int FindWindow(string lpClassName, string lpWindowName);
private void button1_Click(object sender, EventArgs e)
{
string strURL = "http://hi.csdn.net/zenghd";
CopyDataStruct cds;
cds.dwData = (IntPtr)1;
cds.lpData = strURL;
cds.cbData = System.Text.Encoding.Default.GetBytes(strURL).Length + 1;
SendMessage(FindWindow(null,"B" ), WM_COPYDATA, 0, ref cds); // 这里要修改成接收窗口的标题
}
接收端：
public struct CopyDataStruct
{
public IntPtr dwData;
public int cbData;
[MarshalAs(UnmanagedType.LPStr)]
public string lpData;
}
private const int WM_COPYDATA = 0x004A;
protected override void WndProc(ref System.Windows.Forms.Message e)
{
if (e.Msg == WM_COPYDATA)
{
CopyDataStruct cds = (CopyDataStruct)e.GetLParam(typeof(CopyDataStruct));
MessageBox.Show(cds.lpData);
}
base.WndProc(ref e);
}
