private void ShowErrorDialogWithHelp(
IWin32Window parent,
string caption,
string message,
string details,
IHelpTopic helpTopic)
{
Debug.Assert(!(parent is Control) || !((Control)parent).InvokeRequired);
using (ApplicationTraceSources.Default.TraceMethod().WithParameters(caption, message, details))
{
var config = new UnsafeNativeMethods.TASKDIALOGCONFIG()
{
cbSize = (uint)Marshal.SizeOf(typeof(UnsafeNativeMethods.TASKDIALOGCONFIG)),
hwndParent = parent?.Handle ?? IntPtr.Zero,
dwFlags = 0,
dwCommonButtons = UnsafeNativeMethods.TASKDIALOG_COMMON_BUTTON_FLAGS.TDCBF_OK_BUTTON,
pszWindowTitle = "An error occured",
MainIcon = TaskDialogIcons.TD_ERROR_ICON,
pszMainInstruction = caption,
pszContent = message,
pszExpandedInformation = details.ToString()
};
if (helpTopic != null)
{
//
// Add hyperlinked footer text.
//
config.FooterIcon = TaskDialogIcons.TD_INFORMATION_ICON;
config.dwFlags |= UnsafeNativeMethods.TASKDIALOG_FLAGS.TDF_EXPAND_FOOTER_AREA |
UnsafeNativeMethods.TASKDIALOG_FLAGS.TDF_ENABLE_HYPERLINKS;
config.pszFooter = $"For more information, see <A HREF=\"#\">{helpTopic.Title}</A>";
config.pfCallback = (hwnd, notification, wParam, lParam, refData) =>
{
if (notification == UnsafeNativeMethods.TASKDIALOG_NOTIFICATIONS.TDN_HYPERLINK_CLICKED)
{
this.serviceProvider.GetService <HelpService>().OpenTopic(helpTopic);
}
return(0); // S_OK;
};
}
UnsafeNativeMethods.TaskDialogIndirect(
ref config,
out int buttonPressed,
out int radioButtonPressed,
out bool verificationFlagPressed);
}
}
public int ShowOptionsTaskDialog(
IWin32Window parent,
IntPtr mainIcon,
string windowTitle,
string mainInstruction,
string content,
string details,
IList <string> optionCaptions,
string verificationText,
out bool verificationFlagPressed)
{
// The options to show.
var options = optionCaptions
.Select(caption => Marshal.StringToHGlobalUni(caption))
.ToArray();
// Wrap each option by a TASKDIALOG_BUTTON_RAW structure and
// marshal them one by one into a native memory buffer.
var buttonsBuffer = Marshal.AllocHGlobal(
Marshal.SizeOf <UnsafeNativeMethods.TASKDIALOG_BUTTON_RAW>() * options.Length);
var currentButton = buttonsBuffer;
for (int i = 0; i < options.Length; i++)
{
Marshal.StructureToPtr <UnsafeNativeMethods.TASKDIALOG_BUTTON_RAW>(
new UnsafeNativeMethods.TASKDIALOG_BUTTON_RAW()
{
nButtonID = ButtonIdOffset + i, // Add offset to avoid conflict with IDOK/IDCANCEL.
pszButtonText = options[i]
},
currentButton,
false);
currentButton += Marshal.SizeOf <UnsafeNativeMethods.TASKDIALOG_BUTTON_RAW>();
}
try
{
var config = new UnsafeNativeMethods.TASKDIALOGCONFIG()
{
cbSize = (uint)Marshal.SizeOf(typeof(UnsafeNativeMethods.TASKDIALOGCONFIG)),
hwndParent = parent.Handle,
dwFlags = UnsafeNativeMethods.TASKDIALOG_FLAGS.TDF_USE_COMMAND_LINKS,
dwCommonButtons = UnsafeNativeMethods.TASKDIALOG_COMMON_BUTTON_FLAGS.TDCBF_OK_BUTTON |
UnsafeNativeMethods.TASKDIALOG_COMMON_BUTTON_FLAGS.TDCBF_CANCEL_BUTTON,
pszWindowTitle = windowTitle,
MainIcon = mainIcon,
pszMainInstruction = mainInstruction,
pszContent = content,
pButtons = buttonsBuffer,
cButtons = (uint)options.Length,
pszExpandedInformation = details,
pszVerificationText = verificationText
};
UnsafeNativeMethods.TaskDialogIndirect(
ref config,
out int buttonPressed,
out int radioButtonPressed,
out verificationFlagPressed);
if (buttonPressed == UnsafeNativeMethods.IDOK)
{
// Pick first option.
return(0);
}
else if (buttonPressed >= ButtonIdOffset)
{
// Option selected.
return(buttonPressed - ButtonIdOffset);
}
else
{
throw new OperationCanceledException("Task dialog was cancelled");
}
}
finally
{
foreach (var option in options)
{
Marshal.FreeHGlobal(option);
}
Marshal.FreeHGlobal(buttonsBuffer);
}
}
