如何以编程方式最小化打开的窗口文件夹

Question

如何获取打开的文件夹列表,通过它进行枚举并以编程方式最小化每个文件夹？

有时,一些打开的文件夹在从应用程序中的一个表单跳转到另一个表单时会从该工具中窃取焦点.防止这种情况对我们的客户来说是高度优先的.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,实际上是一个要求.

我试过这个:

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

正如预期的那样没有好处.

更新:

从这里的答案,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);
    }

这创造了许多隐形的探索者窗口,突然在taksbar中列出了无处可见的地方.我在处理Windows API方面有点不容易,因此代码本身实际上会有所帮助.

Answer 1

请尝试这个(代码有点凌乱,但为了这个目的,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;
    }
}

最好的祝福,

朱波罗卡

Answer 2

//通过引用COM库"Microsoft Shell控件和自动化"-shell32.dll来创建Shell类的实例

Shell32.ShellClass objShell = new Shell32.ShellClass();
//Show Desktop
((Shell32.IShellDispatch4)objShell).ToggleDesktop();

编辑:在切换后显示您的应用程序(激活或最大化/恢复)实际上非常困难:

我试过了:

Application.DoEvents();

System.Threading.Thread.Sleep(5000);

即使重写WndProc也无法捕获事件:

private const Int32 WM_SYSCOMMAND = 0x112;
        private const Int32 SC_MINIMIZE = 0xf020;
        protected override void WndProc(ref Message m)
        {
            if (m.Msg == WM_SYSCOMMAND)
            {
                if (m.WParam.ToInt32() == SC_MINIMIZE)
                    return;
            }
            base.WndProc(ref m);
        }

因此,我建议不要将所有其他窗口最小化,只需在操作过程中将其保持在最顶层,然后在完成关闭时始终保持在最佳状态:

  [DllImport("user32.dll")]
    static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);

static readonly IntPtr HWND_TOPMOST = new IntPtr(-1);

const UInt32 SWP_NOSIZE = 0x0001;
const UInt32 SWP_NOMOVE = 0x0002;
const UInt32 TOPMOST_FLAGS = SWP_NOMOVE | SWP_NOSIZE;

public static void MakeTopMost (IntPtr hWnd)
{
    SetWindowPos(hWnd, HWND_TOPMOST, 0, 0, 0, 0, TOPMOST_FLAGS);
}

Answer 3

有一个比此处提供的接受答案更少“hacky”的解决方案：最小化文件夹

它基于Shell Objects for Scripting。样本：

const int SW_SHOWMINNOACTIVE = 7;

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

static void MinimizeWindow(IntPtr handle)
{
    ShowWindow(handle, SW_SHOWMINNOACTIVE);
}

//call it like:

foreach (IWebBrowser2 window in new Shell().Windows())
{
    if (window.Name == "Windows Explorer")
        MinimizeWindow((IntPtr)window.HWND);
}

使用Internet Explorer 对象模型也可以实现同样的效果

// add a reference to "Microsoft Internet Controls" COM component
// also add a 'using SHDocVw;'
foreach (IWebBrowser2 window in new ShellWindows())
{
    if (window.Name == "Windows Explorer")
        MinimizeWindow((IntPtr)window.HWND);
}