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using System;
using System.Diagnostics;
using System.Globalization;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using Microsoft.Office.Interop.Excel;
namespace ConsoleApplication
{
class Program
{
[DllImport("Oleacc.dll")]
static extern int AccessibleObjectFromWindow(IntPtr hwnd, uint dwObjectID, byte[] riid, out ExcelWindow ptr);
public delegate bool EnumChildCallback(IntPtr hwnd, ref IntPtr lParam);
[DllImport("User32.dll")]
public static extern bool EnumChildWindows(IntPtr hWndParent, EnumChildCallback lpEnumFunc, ref IntPtr lParam);
[DllImport("User32.dll")]
public static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);
public static bool EnumChildProc(IntPtr hwndChild, ref IntPtr lParam)
{
StringBuilder buf = new StringBuilder(128);
GetClassName(hwndChild, buf, 128);
if (buf.ToString() == "EXCEL7")
{
lParam = hwndChild;
return false;
}
return true;
}
///
/// Interface definition for Excel.Window interface
///
[Guid("00020893-0000-0000-C000-000000000046")]
[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
public interface ExcelWindow
{
}
///
/// This class is needed as a workaround to http://support.microsoft.com/default.aspx?scid=kb;en-us;320369
/// Excel automation will fail with the follwoing error on systems with non-English regional settings:
/// "Old format or invalid type library. (Exception from HRESULT: 0x80028018 (TYPE_E_INVDATAREAD))"
///
class UILanguageHelper : IDisposable
{
private CultureInfo _currentCulture;
public UILanguageHelper()
{
// save current culture and set culture to en-US
_currentCulture = System.Threading.Thread.CurrentThread.CurrentCulture;
System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US");
}
public void Dispose()
{
// reset to original culture
System.Threading.Thread.CurrentThread.CurrentCulture = _currentCulture;
}
}
static void Main(string[] args)
{
// Use the window class name ("XLMAIN") to retrieve a handle to Excel's main window.
// Alternatively you can get the window handle via the process id:
// int hwnd = (int)Process.GetProcessById(excelPid).MainWindowHandle;
//
foreach (Process excelProcess in Process.GetProcessesByName("EXCEL"))
{
IntPtr hwnd = excelProcess.MainWindowHandle;
if (hwnd != IntPtr.Zero)
{
IntPtr hwndChild = IntPtr.Zero;
// Search the accessible child window (it has class name "EXCEL7")
EnumChildCallback cb = new EnumChildCallback(EnumChildProc);
EnumChildWindows(hwnd, cb, ref hwndChild);
if (hwndChild != IntPtr.Zero)
{
// We call AccessibleObjectFromWindow, passing the constant OBJID_NATIVEOM (defined in winuser.h)
// and IID_IDispatch - we want an IDispatch pointer into the native object model.
//
const uint OBJID_NATIVEOM = 0xFFFFFFF0;
Guid IID_IDispatch = new Guid("{00020400-0000-0000-C000-000000000046}");
ExcelWindow ptr;
int hr = AccessibleObjectFromWindow(hwndChild, OBJID_NATIVEOM, IID_IDispatch.ToByteArray(), out ptr);
if (hr >= 0)
{
// We successfully got a native OM IDispatch pointer, we can QI this for
// an Excel Application using reflection (and using UILanguageHelper to
// fix http://support.microsoft.com/default.aspx?scid=kb;en-us;320369)
//
using (new UILanguageHelper())
{
Application xlApp = (Application)ptr.GetType().InvokeMember("Application", BindingFlags.GetProperty, null, ptr, null);
foreach (Workbook workbook in xlApp.Workbooks)
{
Console.WriteLine(workbook.Name);
}
}
}
}
}
}
Console.ReadLine();
}
}
} |
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