自动关闭webBrowser弹出的所有窗口

在C# winform程序里，webBrowser是一个很好用的，类似浏览器的控件。在模拟post，get请求时，有些时候HttpWebRequest和HttpWebResponse，会不能用，因为有些网站有“防”（加js等）这种请求，必须要浏览器来请求才可以，这样我们就需要把HttpWebRequest的cookie传到WebBrowser里面。

传cookie的话要用到InternetSetCookie这个API函数

  [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
  public static extern bool InternetSetCookie(string lpszUrlName, string lbszCookieName, string lpszCookieData);

引用命名空间：using System.Runtime.InteropServices;

调用示例：InternetSetCookie(“url", "cookiename", "cookievalue");

这样只要设置了cookie，在webBrowser里打开的窗口，会自动加上cookie的。

虽然webBrowser很好用，但有些时候，会弹出一些js窗口，还有脚本错误之类的东东。

1、对于脚本错误的话，webBrowser有个ScriptErrorsSuppressed属性，默认是false，不阻止，要想阻止这类错误，只要设成true，就可以了。

2、对于js窗口，我用了windows api 函数FindWindow等。

我封装了一个类，在程序中调用就可以实现关闭所有弹出的js窗口。

调用代码：CloseJsWindow.StartCloseWindow();

类代码：

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Threading;

namespace SUP
{
    public class CloseJsWindow
    {
        [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll", EntryPoint = "FindWindowEx", SetLastError = true)]
        private static extern IntPtr FindWindowEx(IntPtr hwndParent, uint hwndChildAfter, string lpszClass, string lpszWindow);

        [DllImport("user32.dll", EntryPoint = "SendMessage", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern int SendMessage(IntPtr hwnd, uint wMsg, IntPtr wParam, int lParam);

        [DllImport("user32.dll", EntryPoint = "SetForegroundWindow", SetLastError = true)]
        private static extern void SetForegroundWindow(IntPtr hwnd);

        private static string windowTitle = "Message from webpage";
        private const uint BM_CLICK = 0xF5; //鼠标点击的消息，对于各种消息的数值，大家还是得去API手册

        static System.Threading.Timer findTimer;
        static AutoResetEvent autoEvent;

   
        /// <summary>
        /// 开始监视js弹出的窗口
        /// </summary>
        public static void StartCloseWindow()
        {
            autoEvent = new AutoResetEvent(false); //初始状态设置为非终止
            TimerCallback timerDelegate = new TimerCallback(CloseWindow);
            findTimer = new System.Threading.Timer(timerDelegate, autoEvent, 1000, 800); //每0.8秒钟查找一次
        }
        /// <summary>
        /// 停止监视js弹出的窗口
        /// </summary>
        public static void StopCloseWindow()
        {
            autoEvent.WaitOne(10, false);  //设置10毫秒，是让程序有一个等待，如果设为0，会一直弹窗口
            findTimer.Dispose();
        }
        private static void CloseWindow(object state)
        {
            IntPtr hwnd = FindWindow(null, windowTitle); //查找窗口的句柄
            if (hwnd != IntPtr.Zero)
            {
                IntPtr hwndSure = FindWindowEx(hwnd, 0, "Button", "确定"); //获取确定按钮的句柄
                SendMessage(hwndSure, BM_CLICK, (IntPtr)0, 0); //发送单击消息
            }
        }
    }
}

要想停止的话，只要调用 CloseJsWindow.StopCloseWindow()就行了。

  

下面这个是自动关闭由MessageBox.Show()弹出的对话框

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Threading;

namespace xmypkj
{
    public class MessageBoxAuto
    {
        [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll", EntryPoint = "SendMessage", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern int SendMessage(IntPtr hwnd, uint wMsg, IntPtr wParam, int lParam);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int PostMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);

        public const int WM_CLOSE = 0x10;
        private const uint BM_CLICK = 0xF5; //鼠标点击的消息，对于各种消息的数值，大家还是得去API手册

        private static string title = "提示信息"; //查找窗口时，标题最好不要为空
        static System.Threading.Timer findTimer;
        static AutoResetEvent autoEvent;

        public static void Show(string text)
        {
            StartCloseMessageBox(3000); //默认3秒关闭
            MessageBox.Show(text, title);
            StopCloseMessageBox();
        }
        public static void Show(string text, string caption)
        {
            StartCloseMessageBox(3000);
            title = caption;
            MessageBox.Show(text, caption);
            StopCloseMessageBox();
        }
        public static void Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, int millis)
        {
            StartCloseMessageBox(millis);
            title = caption;
            MessageBox.Show(text, caption, buttons, icon);
            StopCloseMessageBox();
        }
        /// <summary>
        /// 开始监视MessageBox
        /// </summary>
        private static void StartCloseMessageBox(int millis)
        {
            autoEvent = new AutoResetEvent(false); //初始状态设置为非终止
            TimerCallback timerDelegate = new TimerCallback(CloseWindow);
            findTimer = new System.Threading.Timer(timerDelegate, autoEvent, 2000, millis);
        }
        /// <summary>
        /// 停止监视MessageBox
        /// </summary>
        private static void StopCloseMessageBox()
        {
            autoEvent.WaitOne(10, false);  //设置10毫秒，是让程序有一个等待，如果设为0，会一直弹窗口
            findTimer.Dispose();
        }
        /// <summary>
        /// 发送按钮单击消息关闭窗口
        /// </summary>
        /// <param name="state"></param>
        private static void CloseWindow(object state)
        {
            IntPtr hwnd = FindWindow(null, title); //查找窗口的句柄
            if (hwnd != IntPtr.Zero)
            {
                PostMessage(hwnd, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
            }
        }
    }
}

调用代码
 MessageBoxAuto.Show("验证码识别组件加载失败！");