/// <summary>
/// Specifies a common dialog box.
/// </summary>
/// <param name="hwndOwner">A value that represents the window handle of the owner window for the common dialog box.</param>
/// <returns><see langword="true"/> if the file could be opened; otherwise, <see langword="false"/>.</returns>
protected override bool RunDialog(IntPtr hwndOwner)
{
if (DownlevelDialog != null)
{
return(DownlevelDialog.ShowDialog(hwndOwner == IntPtr.Zero ? null : new Interop.WindowHandleWrapper(hwndOwner)) == DialogResult.OK);
}
else
{
return(RunFileDialog(hwndOwner));
}
}
/// <summary>
/// Displays the file dialog.
/// </summary>
/// <param name="owner">Handle to the window that owns the dialog.</param>
/// <returns>If the user clicks the OK button of the dialog that is displayed (e.g. <see cref="VistaOpenFileDialog" />, <see cref="VistaSaveFileDialog" />), <see langword="true" /> is returned; otherwise, <see langword="false" />.</returns>
public bool?ShowDialog(Window owner)
{
_owner = owner;
if (DownlevelDialog != null)
{
return(DownlevelDialog.ShowDialog(owner));
}
else
{
IntPtr ownerHandle = owner == null?NativeMethods.GetActiveWindow() : new WindowInteropHelper(owner).Handle;
return(ShowDialog(ownerHandle));
}
}
/// <summary>
/// When overridden in a derived class, displays a particular type of common dialog box.
/// </summary>
protected override bool RunDialog(IntPtr hwndOwner)
{
Window owner = (Window)HwndSource.FromHwnd(hwndOwner).RootVisual;
_owner = owner;
if (DownlevelDialog != null)
{
return(DownlevelDialog.ShowDialog(owner) ?? false);
}
Ookii.Dialogs.Wpf.Interop.IFileDialog dialog = null;
try
{
dialog = CreateFileDialog();
SetDialogProperties(dialog);
int result = dialog.Show(hwndOwner);
if (result < 0)
{
if (result == (int)HRESULT.ERROR_CANCELLED)
{
return(false);
}
else
{
throw System.Runtime.InteropServices.Marshal.GetExceptionForHR(result);
}
}
return(true);
}
finally
{
if (dialog != null)
{
System.Runtime.InteropServices.Marshal.FinalReleaseComObject(dialog);
}
}
}