C# EasyConnect 断线自动重连的实现 V1.0 juejin.cn/post/705256…
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Threading;
using System.Diagnostics;
namespace WinFormsApp
{
public partial class Form1 : Form
{
private static System.Threading.Timer timer;
private int i = 0;
private int type = 1;
private List<IntPtr> ListTitleHandle = new List<IntPtr>();
private const uint BM_CLICK = 0xF5;
private const uint WM_SETTEXT = 0x000C;
private string username;
private string password;
public Form1()
{
InitializeComponent();
}
/// <summary>
/// 获取窗体的句柄函数
/// </summary>
/// <param name="lpClassName">窗口类名</param>
/// <param name="lpWindowName">窗口标题名</param>
/// <returns>返回句柄</returns>
[DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
//
//
//
//
/// <summary>
/// 发送消息到窗体函数
/// </summary>
/// <param name="hwnd">窗体句柄</param>
/// <param name="wMsg">消息类型</param>
/// <param name="wParam">附带消息</param>
/// <param name="lParam"></param>
/// <returns></returns>
[DllImport("user32.dll", EntryPoint = "SendMessage", SetLastError = true, CharSet = CharSet.Auto)]
public static extern IntPtr SendMessage(IntPtr hwnd, uint wMsg, int wParam, int lParam);
[DllImport("user32.dll", EntryPoint = "SendMessage", SetLastError = true, CharSet = CharSet.Auto)]
public static extern IntPtr SendMessageString(IntPtr hWnd, uint Msg, int wParam, string lParam);
//函数指针类型
delegate bool deleWindowsProc(IntPtr hWnd, string lParam);
[DllImport("user32.dll")]
static extern int EnumWindows(deleWindowsProc hWnd, string lParam);
public delegate bool Callback(IntPtr hwnd, IntPtr lParam);
[DllImport("user32")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool EnumChildWindows(IntPtr parentHandle, Callback callback, IntPtr lParam);
[DllImport("user32.dll")]
public static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);
[DllImport("user32.dll", EntryPoint = "GetClassName")]
public static extern int GetClassName(IntPtr hWnd, StringBuilder lpString, int nMaxCont);
[DllImport("user32.dll", EntryPoint = "FindWindowEx", SetLastError = true)]
private static extern IntPtr FindWindowEx(
IntPtr hwndParent, uint hwndChildAfter, string lpszClass, string lpszWindow
);
private void btn_exit_Click(object sender, EventArgs e)
{
System.Environment.Exit(0);
}
private void login() {
var r = EnumWindows(PrintWindow, "EasyConnect");
if (type == 1)
{
Callback callback = new Callback(InitEnumProc);
foreach (IntPtr i in ListTitleHandle)
{
lock (callback) {
EnumChildWindows(i, callback, IntPtr.Zero);
}
}
}
else
{
Callback callback = new Callback(EnumProc);
foreach (IntPtr i in ListTitleHandle)
{
lock (callback)
{
EnumChildWindows(i, callback, IntPtr.Zero);
}
}
}
if (i > 133)
{
if (i == 134)
{
i = 0;
ListTitleHandle.Clear();
Debug.WriteLine("正在初始化");
Thread.Sleep(1000);
login();
}
else
{
type = 2;
i = 0;
ListTitleHandle.Clear();
Debug.WriteLine("初始化完成");
Thread.Sleep(1000);
login();
}
}
i = 0;
type = 1;
ListTitleHandle.Clear();
}
private void start(object source)
{
Debug.WriteLine("开始监听");
IntPtr window = FindWindow(null, "EasyConnect");
if (window != IntPtr.Zero)
{
Debug.WriteLine("找到:EasyConnect");
IntPtr buttonObj = FindWindowEx(window, 0, "Button", "重新登录");
if (buttonObj != IntPtr.Zero)
{
Debug.WriteLine("找到:重新登录");
//这里不知道为什么要两次才生效
SendMessage(buttonObj, BM_CLICK, 0, 0);
SendMessage(buttonObj, BM_CLICK, 0, 0);
Thread.Sleep(2000);
login();
}
}
Debug.WriteLine("结束监听");
}
private void btnCloseText_Click(object sender, EventArgs e)
{
username = textBox1.Text;
password = textBox2.Text;
if (string.IsNullOrEmpty(username))
{
MessageBox.Show("用户名不能为空");
return;
}
if (string.IsNullOrEmpty(password))
{
MessageBox.Show("密码不能为空");
return;
}
// 第一个参数是：回调方法，表示要定时执行的方法，
// 第二个参数是：回调方法要使用的信息的对象，或者为空引用，
// 第三个参数是：调用 callback 之前延迟的时间量（以毫秒为单位），指定 Timeout.Infinite 以防止计时器开始计时。指定零 (0) 以立即启动计时器。
// 第四个参数是：定时的时间时隔，以毫秒为单位
timer = new System.Threading.Timer(start, null, 0, 10000);
}
public Boolean InitEnumProc(IntPtr hWnd, IntPtr lParam)
{
StringBuilder sb = new StringBuilder(256);
GetWindowText(hWnd, sb, sb.Capacity);
if (i == 77 && "正在初始化...".Equals(sb.ToString()))
{
return false;
}
i++;
return true;
}
public Boolean EnumProc(IntPtr hWnd, IntPtr lParam)
{
//由于新手，没办法知道控件的唯一标识，只能用下标了，有没有谁有更好的办法
if (i == 98)
{
SendMessageString(hWnd, WM_SETTEXT, 0, username);
}
if (i == 100)
{
SendMessageString(hWnd, WM_SETTEXT, 0, password);
}
if (i == 126)
{
SendMessage(hWnd, BM_CLICK, 0, 0);
return false;
}
i++;
return true;
}
//回调函数
bool PrintWindow(IntPtr hWnd, string lParam)
{
//分配空间
var sb = new StringBuilder(50);
GetWindowText(hWnd, sb, sb.Capacity);
//注意某些窗口没有标题
if (sb.ToString() != String.Empty && sb.ToString().Equals(lParam))
{
GetClassName(hWnd, sb, sb.Capacity);
ListTitleHandle.Add(hWnd);
}
//返回True继续往下回调，返回False终止
return true;
}
}
}
