使用 WinAPI 获取文件夹的选定项目 [英] Get selected items of folder with WinAPI

问题描述

我尝试获取用户正在使用的文件夹中的选定文件.我有以下代码已经在运行，但仅限于桌面文件:

I try to get the selected files of a folder which the user is using. I have the following code which is already running, but only on desktop files:

private string selectedFiles()
{
    // get the handle of the desktop listview
    IntPtr vHandle = WinApiWrapper.FindWindow("Progman", "Program Manager");
    vHandle = WinApiWrapper.FindWindowEx(vHandle, IntPtr.Zero, "SHELLDLL_DefView", null);
    vHandle = WinApiWrapper.FindWindowEx(vHandle, IntPtr.Zero, "SysListView32", "FolderView");
    
    //IntPtr vHandle = WinApiWrapper.GetForegroundWindow();

    //Get total count of the icons on the desktop
    int vItemCount = WinApiWrapper.SendMessage(vHandle, WinApiWrapper.LVM_GETITEMCOUNT, 0, 0);
    //MessageBox.Show(vItemCount.ToString());
    uint vProcessId;
    WinApiWrapper.GetWindowThreadProcessId(vHandle, out vProcessId);
    IntPtr vProcess = WinApiWrapper.OpenProcess(WinApiWrapper.PROCESS_VM_OPERATION | WinApiWrapper.PROCESS_VM_READ |
    WinApiWrapper.PROCESS_VM_WRITE, false, vProcessId);
    IntPtr vPointer = WinApiWrapper.VirtualAllocEx(vProcess, IntPtr.Zero, 4096,
    WinApiWrapper.MEM_RESERVE | WinApiWrapper.MEM_COMMIT, WinApiWrapper.PAGE_READWRITE);
    try
    {
        for (int j = 0; j < vItemCount; j++)
        {
            byte[] vBuffer = new byte[256];
            WinApiWrapper.LVITEM[] vItem = new WinApiWrapper.LVITEM[1];
            vItem[0].mask = WinApiWrapper.LVIF_TEXT;
            vItem[0].iItem = j;
            vItem[0].iSubItem = 0;
            vItem[0].cchTextMax = vBuffer.Length;
            vItem[0].pszText = (IntPtr)((int)vPointer + Marshal.SizeOf(typeof(WinApiWrapper.LVITEM)));
            uint vNumberOfBytesRead = 0;
            WinApiWrapper.WriteProcessMemory(vProcess, vPointer,
            Marshal.UnsafeAddrOfPinnedArrayElement(vItem, 0),
            Marshal.SizeOf(typeof(WinApiWrapper.LVITEM)), ref vNumberOfBytesRead);
            WinApiWrapper.SendMessage(vHandle, WinApiWrapper.LVM_GETITEMW, j, vPointer.ToInt32());
            WinApiWrapper.ReadProcessMemory(vProcess,
            (IntPtr)((int)vPointer + Marshal.SizeOf(typeof(WinApiWrapper.LVITEM))),
            Marshal.UnsafeAddrOfPinnedArrayElement(vBuffer, 0),
            vBuffer.Length, ref vNumberOfBytesRead);
            string vText = Encoding.Unicode.GetString(vBuffer, 0,
            (int)vNumberOfBytesRead);
            string IconName = vText;

            //Check if item is selected
            var result = WinApiWrapper.SendMessage(vHandle, WinApiWrapper.LVM_GETITEMSTATE, j, (int)WinApiWrapper.LVIS_SELECTED);
            if (result == WinApiWrapper.LVIS_SELECTED)
            {
                return vText;
            }
        }
    }
    finally
    {
        WinApiWrapper.VirtualFreeEx(vProcess, vPointer, 0, WinApiWrapper.MEM_RELEASE);
        WinApiWrapper.CloseHandle(vProcess);
    }
    return String.Empty;
}

我尝试使用 GetForegroundWindow() 获取窗口句柄，然后调用 SHELLDLL_DefView 没有成功.

I tried to get the window handle with GetForegroundWindow() and then call the SHELLDLL_DefView without success.

那么如何更改前 3 行以获取当前正在使用的文件夹的句柄?

So how can I change the first 3 rows to get me the handle of the current folder in use?

推荐答案

要执行各种 shell 对象和接口明确支持的操作，需要进行大量的黑客攻击.授予文档并不容易发现，但功能就在那里.Raymond Chen 写了一篇关于使用的很棒的文章这些接口.似乎没有办法获取当前"文件夹，但我想您可以获取 HWND 并查看是否有前景窗口.

That's a lot of hacking to do something that is explicitly supported by the various shell objects and interfaces. Granted the documentation doesn't make it easily discoverable, but the functionality is there. Raymond Chen wrote a great article about using these interfaces. There doesn't appear to be a way to get the "current" folder, though I guess you could get the HWNDs and see if any is the foreground window.

这篇关于使用 WinAPI 获取文件夹的选定项目的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！