/// <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>
/// Releases the unmanaged resources used by the <see cref="VistaFileDialog" /> and optionally releases the managed resources.
/// </summary>
/// <param name="disposing"><see langword="true"/> to release both managed and unmanaged resources; <see langword="false"/> to release only unmanaged resources.</param>
protected override void Dispose(bool disposing)
{
try
{
if (disposing && DownlevelDialog != null)
{
DownlevelDialog.Dispose();
}
}
finally
{
base.Dispose(disposing);
}
}
/// <summary>
/// Resets all properties to their default values.
/// </summary>
public virtual void Reset()
{
if (DownlevelDialog != null)
{
DownlevelDialog.Reset();
}
else
{
_fileNames = null;
_filter = null;
_filterIndex = 1;
_addExtension = true;
_defaultExt = null;
_options = 0;
_title = null;
CheckPathExists = true;
}
}
/// <summary>
/// Resets all properties to their default values.
/// </summary>
public override void Reset()
{
if (DownlevelDialog != null)
{
DownlevelDialog.Reset();
}
else
{
_fileNames = null;
_filter = null;
_filterIndex = 1;
_addExtension = true;
_defaultExt = null;
_options = 0;
_showHelp = false;
_title = null;
_supportMultiDottedExtensions = false;
CheckPathExists = true;
}
}
/// <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);
}
}
}
