c# - 使用c#获取chrome浏览器标题

Question

假设我打开了多个 chrome 窗口(不是标签页)，
如何查看浏览器标题？

我尝试了以下方法:

Process[] p = Process.GetProcessesByName("chrome");

foreach (Process item in p)
{
    Console.WriteLine(item.MainWindowTitle);
}

但它只返回最后打开的窗口名称，其他所有都是空白..

Answer 1

我不得不做这样的事情，但它涉及到调用 Windows API 函数，非常繁琐。问题是 Chrome 似乎对多个窗口使用单个进程或其他一些奇怪的东西，这意味着简单的方法对我不起作用。

无论如何，试试这个，看看它是否有效。基本上它使用 Chrome 窗口类名(可能是 Chrome_WidgetWin_0 或 Chrome_WidgetWin_1)来枚举所有具有该类名的窗口，并返回那些非空白的窗口标题.

请注意，出于某种原因，这也总是会返回一个名为 "Chrome App Launcher" 的窗口标题，因此您可能需要将其过滤掉。

注意:您还可以通过使用“MozillaWindowClass”为 Firefox 执行此操作，通过使用“IEFrame”为 IE 执行此操作(尽管其中任何一个都可能随着不同的版本而改变)。

using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Runtime.InteropServices;
using System.Security;
using System.Text;

namespace Demo
{
    class WindowsByClassFinder
    {
        public delegate bool EnumWindowsDelegate(IntPtr hWnd, IntPtr lparam);

        [SuppressMessage("Microsoft.Security", "CA2118:ReviewSuppressUnmanagedCodeSecurityUsage"), SuppressUnmanagedCodeSecurity]
        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        public static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);

        [SuppressMessage("Microsoft.Security", "CA2118:ReviewSuppressUnmanagedCodeSecurityUsage"), SuppressUnmanagedCodeSecurity]
        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        public extern static bool EnumWindows(EnumWindowsDelegate lpEnumFunc, IntPtr lparam);

        [SuppressMessage("Microsoft.Security", "CA2118:ReviewSuppressUnmanagedCodeSecurityUsage"), SuppressUnmanagedCodeSecurity]
        [DllImport("User32", CharSet=CharSet.Auto, SetLastError=true)]
        public static extern int GetWindowText(IntPtr windowHandle, StringBuilder stringBuilder, int nMaxCount);

        [DllImport("user32.dll", EntryPoint = "GetWindowTextLength", SetLastError = true)]
        internal static extern int GetWindowTextLength(IntPtr hwnd);


        /// <summary>Find the windows matching the specified class name.</summary>

        public static IEnumerable<IntPtr> WindowsMatching(string className)
        {
            return new WindowsByClassFinder(className)._result;
        }

        private WindowsByClassFinder(string className)
        {
            _className = className;
            EnumWindows(callback, IntPtr.Zero);
        }

        private bool callback(IntPtr hWnd, IntPtr lparam)
        {
            if (GetClassName(hWnd, _apiResult, _apiResult.Capacity) != 0)
            {
                if (string.CompareOrdinal(_apiResult.ToString(), _className) == 0)
                {
                    _result.Add(hWnd);
                }
            }

            return true; // Keep enumerating.
        }

        public static IEnumerable<string> WindowTitlesForClass(string className)
        {
            foreach (var windowHandle in WindowsMatchingClassName(className))
            {
                int length = GetWindowTextLength(windowHandle);
                StringBuilder sb = new StringBuilder(length + 1);
                GetWindowText(windowHandle, sb, sb.Capacity);
                yield return sb.ToString();
            }
        }

        public static IEnumerable<IntPtr> WindowsMatchingClassName(string className)
        {
            if (string.IsNullOrWhiteSpace(className))
                throw new ArgumentOutOfRangeException("className", className, "className can't be null or blank.");

            return WindowsMatching(className);
        }

        private readonly string _className;
        private readonly List<IntPtr> _result = new List<IntPtr>();
        private readonly StringBuilder _apiResult = new StringBuilder(1024);
    }

    class Program
    {
        void run()
        {
            ChromeWindowTitles().Print();
        }

        public IEnumerable<string> ChromeWindowTitles()
        {
            foreach (var title in WindowsByClassFinder.WindowTitlesForClass("Chrome_WidgetWin_0"))
                if (!string.IsNullOrWhiteSpace(title))
                    yield return title;

            foreach (var title in WindowsByClassFinder.WindowTitlesForClass("Chrome_WidgetWin_1"))
                if (!string.IsNullOrWhiteSpace(title))
                    yield return title;
        }

        static void Main()
        {
            new Program().run();
        }
    }

    static class DemoUtil
    {
        public static void Print(this object self)
        {
            Console.WriteLine(self);
        }

        public static void Print(this string self)
        {
            Console.WriteLine(self);
        }

        public static void Print<T>(this IEnumerable<T> self)
        {
            foreach (var item in self)
                Console.WriteLine(item);
        }
    }
}