[英]C# Pinvoke can't find the Hwnd of Controls after List count was 0 at first time
我試圖單擊另一個應用程序中的按鈕(從我的Programm中以Process.Start開始)
問題:我需要等到“加載”屏幕消失並且GUI彈出窗口出現...
我的想法是讀取所有(Hwnd)控件,直到從GUI找到特定控件(按鈕:“ Kill Client”)為止(= GUI已打開)。
但這僅在我手動等待GUI並按“搜索控制”按鈕時有效。
如果在加載屏幕處於活動狀態時按“搜索按鈕”,則會得到Hwnd = 0(List <'IntPtr>計數也為0 ...),如果在打開GUI時再次按該按鈕,則它將再次為0( List <'IntPtr>也算...)!!!
這是我的代碼:
public class WndSearcher
{
[DllImport("user32")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool EnumChildWindows(IntPtr window, EnumWindowProc callback, IntPtr i);
public static List<IntPtr> GetChildWindows(IntPtr parent)
{
List<IntPtr> result = new List<IntPtr>();
GCHandle listHandle = GCHandle.Alloc(result);
try
{
EnumWindowProc childProc = new EnumWindowProc(EnumWindow);
EnumChildWindows(parent, childProc, GCHandle.ToIntPtr(listHandle));
}
finally
{
if (listHandle.IsAllocated)
listHandle.Free();
}
return result;
}
private static bool EnumWindow(IntPtr handle, IntPtr pointer)
{
GCHandle gch = GCHandle.FromIntPtr(pointer);
List<IntPtr> list = gch.Target as List<IntPtr>;
if (list == null)
{
throw new InvalidCastException("GCHandle Target could not be cast as List<IntPtr>");
}
list.Add(handle);
return true;
}
}
我的按鈕:
List<IntPtr> AllControlHandles = WndSearcher.GetChildWindows(selectedCharacter.Botprocess.MainWindowHandle);
IntPtr ControlHandle = AllControlHandles.Find(x => PInvoke.GetWindowTextRaw(x) == "Kill Client" ? true : false);
MessageBox.Show(ControlHandle.ToString());
PInvoke(類)的一部分:
const int WM_GETTEXT = 0x000D;
const int WM_GETTEXTLENGTH = 0x000E;
[DllImport("user32.dll", CharSet = CharSet.Auto)]
static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, [Out] StringBuilder lParam);
public static string GetWindowTextRaw(IntPtr hwnd)
{
// Allocate correct string length first
int length = (int)SendMessage(hwnd, WM_GETTEXTLENGTH, IntPtr.Zero, null);
StringBuilder sb = new StringBuilder(length + 1);
SendMessage(hwnd, WM_GETTEXT, (IntPtr)sb.Capacity, sb);
return sb.ToString();
}
直到現在都找不到解決方案。
因此,我決定將AutoHotKey與C#結合使用。
在C#中,我啟動AutoHotKey腳本,然后等待腳本完成。 (然后,外部程序將完全啟動)
起始參數:1.Processid 2.NewExternalProgramName
這是我的AutoHotKey腳本:
counter := 0
Loop, %0% ; For each parameter:
{
param := %A_Index%
if (counter = 0) ; do sth with parameter 1
winwait, ahk_pid %param% ; Not logged in ;wait until the text "Not logged in" can be read (Program started completely)
if (counter = 1) ; do sth with parameter 2
WinSetTitle, %param%
counter += 1
}
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