C# 调用 Win10/11 文件关联对话框

氛疵发表于 2025-6-1 18:55:09

方法一：调用未公开接口 IOpenWithLauncher

Adobe Acrobat 应该是调用的未公开接口方法

interface IOpenWithLauncher
{

int Launch(IntPtr hWndParent,
      string lpszPath,
      IMMERSIVE_OPENWITH flags);
}

enum IMMERSIVE_OPENWITH
{
NONE = 0,
OVERRIDE = 0x1,
DONOT_EXEC = 0x4,
PROTOCOL = 0x8,
URL = 0x10,
USEPOSITION = 0x20,
DONOT_SETDEFAULT = 0x40,
ACTION = 0x80,
ALLOW_EXECDEFAULT = 0x100,
NONEDP_TO_EDP = 0x200,
EDP_TO_NONEDP = 0x400,
CALLING_IN_APP = 0x800,
};

public static void ShowSetAssocDialog(string extension)
{
var CLSID_ExecuteUnknown = new Guid("{E44E9428-BDBC-4987-A099-40DC8FD255E7}");
var obj = Activator.CreateInstance(Type.GetTypeFromCLSID(CLSID_ExecuteUnknown));
if (obj is IOpenWithLauncher launcher)
{
   launcher.Launch(IntPtr.Zero, extension, IMMERSIVE_OPENWITH.DONOT_EXEC);
   Marshal.ReleaseComObject(launcher);
}
}方法二：通过模拟点击属性对话框“更改”打开方式

此方法来自两年前我的自问自答，代码引用了《C# 窗口过程消息处理 WndProc》中的附加到其他窗口辅助类
Bandizip 使用的这种方法
static extern bool SHObjectProperties(IntPtr hWnd, SHOP shopObjectType, string pszObjectName, string pszPropertyPage);

enum SHOP
{
PRINTERNAME = 1,
FILEPATH = 2,
VOLUMEGUID = 4
}

static extern int GetCurrentProcessId();

static extern int GetWindowThreadProcessId(IntPtr hWnd, out int lpdwProcessId);

static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);

static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

static extern bool SetForegroundWindow(IntPtr hWnd);

static extern bool EnumWindows(EnumWindowsProc lpEnumFunc, IntPtr lParam);

delegate bool EnumWindowsProc(IntPtr hWnd, IntPtr lParam);

public static void ShowSetAssocDialog(string extension)
{
string fileName = Path.ChangeExtension(Path.GetRandomFileName(), extension);
string filePath = Path.Combine(Path.GetTempPath(), fileName);
fileName = Path.GetFileNameWithoutExtension(fileName);
File.WriteAllText(filePath, string.Empty); // 创建临时文件
var frame = new DispatcherFrame();
int pid = GetCurrentProcessId();
SHObjectProperties(IntPtr.Zero, SHOP.FILEPATH, filePath, null); // 显示属性对话框
while (true)
{
   bool found = !EnumWindows((hWnd, lParam) => // 枚举窗口
   {
         GetWindowThreadProcessId(hWnd, out int id);
         if (id == pid) // 比较进程 id
         {
            const int MAX_PATH = 260;
            var sb = new StringBuilder(MAX_PATH);
            GetClassName(hWnd, sb, sb.Capacity);
            if (sb.ToString() == "#32770") // 对话框类名
            {
               GetWindowText(hWnd, sb, sb.Capacity);
               if (sb.ToString().Contains(fileName)) // 对话框标题是否包含文件名
               {
                     SetWindowPos(hWnd, IntPtr.Zero, 0, 0, 0, 0, SWP.HIDEWINDOW); // 隐藏属性对话框
                     MessageHooker.AddHook(hWnd, (ref Message m) =>
                     {
                        const int PSM_CHANGED = 0x400 + 104;
                        if (m.Msg == PSM_CHANGED) // 监测属性表页更改
                        {
                           frame.Continue = false;
                           PostMessage(hWnd, WM.CLOSE, 0, 0); // 等效 EndDialog(hWnd, 0)
                        }
                        return false;
                     });
                     SetForegroundWindow(hWnd);
                     SendKeys.SendWait("%C"); // ALT + C 快捷键
                     return false;
               }
            }
         }
         return true;
   }, IntPtr.Zero);
   if (found) break;
}
File.Delete(filePath); // 删除临时文件
Dispatcher.PushFrame(frame);
}相关资料

Redirecting Open With in Properties Dialog in Windows 10
How to call the "Open With" dialog used to associate file formats in Windows 10 or 11?

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C# 调用 Win10/11 文件关联对话框