private void SetDialogProperties(API.IFileDialog dialog)
{
// Description
if (!string.IsNullOrEmpty(_description))
{
if (_useDescriptionForTitle)
{
dialog.SetTitle(_description);
}
else
{
API.IFileDialogCustomize customize = (API.IFileDialogCustomize)dialog;
customize.AddText(0, _description);
}
}
dialog.SetOptions(API.FOS.FOS_PICKFOLDERS | API.FOS.FOS_FORCEFILESYSTEM | API.FOS.FOS_FILEMUSTEXIST);
if (!string.IsNullOrEmpty(_selectedPath))
{
string parent = Path.GetDirectoryName(_selectedPath);
if (parent == null || !Directory.Exists(parent))
{
dialog.SetFileName(_selectedPath);
}
else
{
string folder = Path.GetFileName(_selectedPath);
dialog.SetFolder(API.CreateItemFromParsingName(parent));
dialog.SetFileName(folder);
}
}
}
/// <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 API.WindowHandleWrapper(hwndOwner)) == DialogResult.OK);
}
API.IFileDialog dialog = null;
try
{
dialog = new API.NativeFileOpenDialog();
SetDialogProperties(dialog);
int result = dialog.Show(hwndOwner);
if (result < 0)
{
if ((uint)result == (uint)API.HRESULT.ERROR_CANCELLED)
{
return(false);
}
else
{
throw System.Runtime.InteropServices.Marshal.GetExceptionForHR(result);
}
}
GetResult(dialog);
return(true);
}
finally
{
if (dialog != null)
{
System.Runtime.InteropServices.Marshal.FinalReleaseComObject(dialog);
}
}
}
private void GetResult(API.IFileDialog dialog)
{
API.IShellItem item;
dialog.GetResult(out item);
item.GetDisplayName(API.SIGDN.SIGDN_FILESYSPATH, out _selectedPath);
}
