无法在桌面上切换 'Align icons to grid'

Question

这是我使用的代码：

private void Button_Click(object sender, RoutedEventArgs e) {
    SendMessage(GetDesktopWindow(), LVM_ARRANGE, LVA_SNAPTOGRID, 0);
}

public const uint LVM_ARRANGE = 0x1000 + 22;
public const int LVA_SNAPTOGRID = 0x0005;

[DllImport("User32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr GetDesktopWindow();

[DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, uint msg, int wParam, int lParam);

当我运行它时没有任何反应。代码借自 https://www.codeproject.com/Messages/1168961/Re-Auto-Arrange-desktop-icons.aspx

也尝试了不同的 Windows 版本。

Answer 1

这段代码对我有用。请注意，它似乎没有更改选项，因此尽管它为我安排了网格，但视图->将图标对齐到网格仍未选中。问题概述如下：How do I get the window handle of the desktop?

Your problem results from a fairly widespread confusion over what the desktop window actually is. The GetDesktopWindow function does precisely what it's documented to do: it returns a handle to the desktop window. This, however, is not the same window that contains the desktop icons.

所以我在这里使用了答案：Get handle to desktop / shell window 但是替换或添加方法和 p/invoke 调用直到我拥有所有必要的东西，因为 link 只提供方法调用而不是 dll导入（我可能在这里留下了一些多余的东西）。

static void Main()
{
    SendMessage(GetDesktopWindow(DesktopWindow.SysListView32), LVM_ARRANGE, LVA_SNAPTOGRID, 0);
    Console.ReadLine();
}

public const int LVM_ARRANGE = 4118;
public const int LVA_SNAPTOGRID = 5;

[DllImport("user32.dll")]
static extern IntPtr GetShellWindow();

[DllImport("user32.dll", CharSet = CharSet.Unicode)]
static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string lclassName, string windowTitle);

[DllImport("User32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr GetDesktopWindow();

[DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, uint msg, int wParam, int lParam);

[DllImport("user32.dll")]
private static extern bool EnumWindows(EnumWindowsProc enumProc, IntPtr lParam);
public delegate bool EnumWindowsProc(IntPtr hWnd, IntPtr lParam);


[DllImport("user32.dll", CharSet = CharSet.Unicode)]
private static extern int GetWindowText(IntPtr hWnd, StringBuilder strText, int maxCount);

[DllImport("user32.dll", CharSet = CharSet.Unicode)]
private static extern int GetWindowTextLength(IntPtr hWnd);

public enum DesktopWindow
{
    ProgMan,
    SHELLDLL_DefViewParent,
    SHELLDLL_DefView,
    SysListView32
}

public static IntPtr GetDesktopWindow(DesktopWindow desktopWindow)
{
    IntPtr _ProgMan = GetShellWindow();
    IntPtr _SHELLDLL_DefViewParent = _ProgMan;
    IntPtr _SHELLDLL_DefView = FindWindowEx(_ProgMan, IntPtr.Zero, "SHELLDLL_DefView", null);
    IntPtr _SysListView32 = FindWindowEx(_SHELLDLL_DefView, IntPtr.Zero, "SysListView32", "FolderView");

    if (_SHELLDLL_DefView == IntPtr.Zero)
    {
        EnumWindows((hwnd, lParam) =>
        {
            if (GetWindowText(hwnd) == "WorkerW")
            {
                IntPtr child = FindWindowEx(hwnd, IntPtr.Zero, "SHELLDLL_DefView", null);
                if (child != IntPtr.Zero)
                {
                    _SHELLDLL_DefViewParent = hwnd;
                    _SHELLDLL_DefView = child;
                    _SysListView32 = FindWindowEx(child, IntPtr.Zero, "SysListView32", "FolderView"); ;
                    return false;
                }
            }
            return true;
        }, IntPtr.Zero);
    }

    switch (desktopWindow)
    {
        case DesktopWindow.ProgMan:
            return _ProgMan;
        case DesktopWindow.SHELLDLL_DefViewParent:
            return _SHELLDLL_DefViewParent;
        case DesktopWindow.SHELLDLL_DefView:
            return _SHELLDLL_DefView;
        case DesktopWindow.SysListView32:
            return _SysListView32;
        default:
            return IntPtr.Zero;
    }
}

public static string GetWindowText(IntPtr hWnd)
{
    int size = GetWindowTextLength(hWnd);
    if (size > 0)
    {
        var builder = new StringBuilder(size + 1);
        GetWindowText(hWnd, builder, builder.Capacity);
        return builder.ToString();
    }

    return String.Empty;
}

无法在桌面上切换 'Align icons to grid'

Can't toggle 'Align icons to grid' on the desktop

c#

winapi

interop