public bool ShowDialog(Window owner)
{
var hwnd = new WindowInteropHelper(owner).Handle;
IntPtr pidl = IntPtr.Zero;
var browseInfo = new BrowseInfo()
{
hwndOwner = hwnd, ulFlags = BrowseFlags.NewDialogStyle | BrowseFlags.ReturnOnlyFSDirs
};
if (!this.ShowNewFolderButton)
{
browseInfo.ulFlags |= BrowseFlags.NoNewFolderButton;
}
try
{
browseInfo.pszDisplayName = Marshal.AllocCoTaskMem(300 * 2);
string title = this.Title;
if (!string.IsNullOrEmpty(title))
{
browseInfo.lpszTitle = Marshal.StringToCoTaskMemUni(title);
}
string path = this.Path ?? string.Empty;
if (path.Length > 259)
{
path = path.Substring(0, 259);
}
Marshal.Copy(path.ToCharArray(), 0, browseInfo.pszDisplayName, path.Length);
Marshal.WriteInt16(browseInfo.pszDisplayName, path.Length, 0);
pidl = SafeNativeMethods.SHBrowseForFolder(ref browseInfo);
if (pidl != IntPtr.Zero)
{
var buffer = new StringBuilder(300);
SafeNativeMethods.SHGetPathFromIDList(pidl, buffer);
this.Path = buffer.ToString();
return(true);
}
return(false);
}
finally
{
if (pidl != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pidl);
}
if (browseInfo.lpszTitle != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(browseInfo.lpszTitle);
}
if (browseInfo.pszDisplayName != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(browseInfo.pszDisplayName);
}
}
}
public static extern IntPtr SHBrowseForFolder(ref BrowseInfo lpbi);