C# .NET - MainWindowTitle returns empty

Asked By mostafa hamdy on 06-Dec-10 06:39 AM
Hello all
I have some desktop application built using C# 3.5 and run the application under win 7 , I have some process which catches the exe of this desktop application , but when I try to get its Mainwindow title it returns empty , the desktop application title is "MyApplication fires" although that I get it empty the code I did is as the following:

foreach (Process ps in Process.GetProcessesByName(Tile))

{

if (ps.MainWindowTitle.ToLower()==Title.ToLower())

{

ps.CloseMainWindow();

ps.Close();

}

}
please if any body get what I mean and can help me please send me or tell me about some URL may help me in solving it
regards
Mostafa

Anoop S replied to mostafa hamdy on 06-Dec-10 09:49 AM
GetWindowText is one of those special functions that does work with other applications--under the covers WM_GETTEXT marshals the memory.  For example: the following does retrieve the caption text for a Notepad window:

using System;
 
using System.Runtime.InteropServices;
 
using System.Text;
 
using System.Security;
 
namespace Application
 
{
 
  public class Program
 
  {
 
    public static void Main ( )
 
    {
 
      IntPtr hwnd = UnsafeNativeMethods.FindWindow("Notepad", null);
 
      StringBuilder stringBuilder = new StringBuilder(256);
 
      UnsafeNativeMethods.GetWindowText(hwnd, stringBuilder, stringBuilder.Capacity);
 
      Console.WriteLine(stringBuilder.ToString());
 
    }
 
  }
 
  [SuppressUnmanagedCodeSecurity]
 
  internal static class UnsafeNativeMethods
 
  {
 
    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
 
    internal static extern int GetWindowText ( IntPtr hWnd, [Out] StringBuilder lpString, int nMaxCount );
 
    [DllImport("user32.dll", SetLastError = true)]
 
    internal static extern IntPtr FindWindow ( string lpClassName, string lpWindowName );
 
 
  }
 
}
http://social.msdn.microsoft.com/forums/en-US/winforms/thread/d332a263-a11b-4638-b70a-468cfd195ced/
Rolf Jaeger replied to mostafa hamdy on 06-Dec-10 09:17 PM
Hi Mustafa:

the GetProcessesByName method requires the name of the PROCESS, not the title of the main window. Please give the code listed below a try and see whether it might work for you.

Hope this helped,
Rolf

foreach (Process p in Process.GetProcesses())
{
  if (p.MainWindowTitle.ToLower() == Title.ToLower())
  {
    p.CloseMainWindow();
    p.Close();
  }
}