[英]Click A MessageBox button programmatically
正如標題所示,我試圖以編程方式模擬MessageBox中的按鈕單擊。 我之前嘗試通過其標題查找其句柄,並在SendMessage()
應用WM_CLOSE
或SC_CLOSE
來關閉MessageBox。 但是,由於存在“是/否”按鈕,這不起作用(X按鈕呈灰色顯示)。
現在我想點擊No按鈕,如下所示 - :
List<IntPtr> result = new List<IntPtr>();
GCHandle listHandle = GCHandle.Alloc(result);
try
{
IntPtr Window_hWnd = CloseMessageBox.FindWindowByCaption("#32770", "LastQuestion"); //Could use null as the first argument too. "#32770" represents classname Dialog.
CloseMessageBox.EnumChildWindows(Window_hWnd, (hWnd, lParam) =>
{
StringBuilder sb = new StringBuilder();
foreach (var control in GCHandle.FromIntPtr(lParam).Target as List<IntPtr>)
{
CloseMessageBox.GetWindowText(control, sb, 250);
if (sb.Equals("&No"))
{
CloseMessageBox.PostMessage(hWnd, CloseMessageBox.MouseDown, 0, 0);
CloseMessageBox.PostMessage(hWnd, CloseMessageBox.MouseUp, 0, 0);
}
}
return false;
}, GCHandle.ToIntPtr(listHandle));
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}
finally
{
if (listHandle.IsAllocated)
listHandle.Free();
}
從IRC的某個人的建議到目前為止,我發現之前的一些編輯,我得到了按鈕句柄(只有“&Yes”按鈕)但不是全部。 然后他建議使用這種方法,但control
列表沒有填充,因此它永遠不會進入foreach
。 我該怎么做才能解決這個問題?
干得好。
// A delegate which is used by EnumChildWindows to execute a callback method.
public delegate bool EnumWindowProc(IntPtr hWnd, IntPtr parameter);
// This method accepts a string which represents the title name of the window you're looking for the controls on.
public static void ClickButtonLabeledNo(string windowTitle)
{
try
{
// Find the main window's handle by the title.
var windowHWnd = FindWindowByCaption(IntPtr.Zero, windowTitle);
// Loop though the child windows, and execute the EnumChildWindowsCallback method
EnumChildWindows(windowHWnd, EnumChildWindowsCallback, IntPtr.Zero);
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}
}
private static bool EnumChildWindowsCallback(IntPtr handle, IntPtr pointer)
{
const uint WM_LBUTTONDOWN = 0x0201;
const uint WM_LBUTTONUP = 0x0202;
var sb = new StringBuilder(256);
// Get the control's text.
GetWindowCaption(handle, sb, 256);
var text = sb.ToString();
// If the text on the control == &No send a left mouse click to the handle.
if (text == @"&No")
{
PostMessage(handle, WM_LBUTTONDOWN, IntPtr.Zero, IntPtr.Zero);
PostMessage(handle, WM_LBUTTONUP, IntPtr.Zero, IntPtr.Zero);
}
return true;
}
[DllImport("user32")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool EnumChildWindows(IntPtr window, EnumWindowProc callback, IntPtr i);
[DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
private static extern IntPtr FindWindowByCaption(IntPtr ZeroOnly, string lpWindowName);
[DllImport("user32.dll", EntryPoint = "GetWindowText", CharSet = CharSet.Auto)]
private static extern IntPtr GetWindowCaption(IntPtr hwnd, StringBuilder lpString, int maxCount);
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("user32.dll", SetLastError = true)]
private static extern bool PostMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
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