c# - 如何以编程方式最小化打开的窗口文件夹

Question

如何获取已打开文件夹的列表、枚举并以编程方式最小化每个文件夹？

有时，当从应用程序中的一种形式跳转到另一种形式时，一些打开的文件夹确实会从工具中窃取焦点。防止这种情况是我们客户的重中之重。客户是视障人士，因此他们只能通过屏幕阅读器访问机器。最小化其他窗口(文件夹)根本不是问题，实际上是必需的。

我试过这个:

foreach (Process p in Process.GetProcessesByName("explorer"))
{
    p.StartInfo.WindowStyle = ProcessWindowStyle.Minimized;
}

正如预期的那样，它并没有什么好处。

更新:

根据这里的答案，我试过这个:

    delegate bool EnumThreadDelegate(IntPtr hWnd, IntPtr lParam);

    [DllImport("user32.dll")]
    static extern bool EnumThreadWindows(int dwThreadId, EnumThreadDelegate lpfn, IntPtr lParam);

    static IEnumerable<IntPtr> EnumerateProcessWindowHandles(int processID)
    {
        List<IntPtr> handles = new List<IntPtr>();

        EnumThreadDelegate addWindowHandle = delegate(IntPtr hWnd, IntPtr param)
        {
            handles.Add(hWnd);
            return true;
        };

        foreach (ProcessThread thread in Process.GetProcessById(processID).Threads)                              
            EnumThreadWindows(thread.Id, addWindowHandle, IntPtr.Zero);

        return handles;
    }

    const int SW_MINIMIZED = 6;

    [DllImport("user32.dll")]
    static extern int ShowWindow(IntPtr hWnd, int nCmdShow);

    private void button1_Click(object sender, EventArgs e)
    {
        foreach (IntPtr handle in EnumerateProcessWindowHandles(Process.GetProcessesByName("explorer")[0].Id))
            ShowWindow(handle, SW_MINIMIZED);
    }

这会创建大量不可见的资源管理器窗口，这些窗口会突然突然出现在任务栏中。我在处理 Windows API 方面有点菜鸟，所以代码本身实际上会有所帮助。

Answer 1

请试试这个(代码有点乱，但出于目的你应该能够通过它;))

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Text;
using System.Globalization;

namespace WindowsFormsApplication20
{
    static class Program
    {
        [STAThread]
        static void Main()
        {
            foreach (IntPtr handle in EnumerateProcessWindowHandles(Process.GetProcessesByName("explorer")[0].Id))
            {
                SendMessage(handle, WM_SYSCOMMAND, SC_MINIMIZE, 0);
            }
        }

        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);

        static string GetDaClassName(IntPtr hWnd)
        {
            int nRet;
            StringBuilder ClassName = new StringBuilder(100);
            //Get the window class name
            nRet = GetClassName(hWnd, ClassName, ClassName.Capacity);
            if (nRet != 0)
            {
                return ClassName.ToString();
            }
            else
            {
                return null;
            }
        }

        delegate bool EnumThreadDelegate(IntPtr hWnd, IntPtr lParam);

        [DllImport("user32.dll")]
        static extern bool EnumThreadWindows(int dwThreadId, EnumThreadDelegate lpfn, IntPtr lParam);

        static IEnumerable<IntPtr> EnumerateProcessWindowHandles(int processID)
        {
            List<IntPtr> handles = new List<IntPtr>();

            EnumThreadDelegate addWindowHandle = delegate(IntPtr hWnd, IntPtr param)
            {
                string className = GetDaClassName(hWnd);

                switch (className)
                {
                    case null:
                        break;
                    case "ExploreWClass":
                        handles.Add(hWnd);
                        break;
                    case "CabinetWClass":
                        handles.Add(hWnd);
                        break;
                    default:
                        break;
                }

                return true;
            };

            foreach (ProcessThread thread in Process.GetProcessById(processID).Threads)
                EnumThreadWindows(thread.Id, addWindowHandle, IntPtr.Zero);

            return handles;
        }

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, int wParam, int lParam);

        const int WM_SYSCOMMAND = 274;
        const int SC_MINIMIZE = 0xF020;
    }
}

最好的问候，

祖布鲁卡