/// <summary>
/// Builds the system file type cache.
/// </summary>
/// <returns>The number of system file type entries enumerated.</returns>
/// <remarks></remarks>
public int Populate(bool fireEvent = true)
{
_Col.Clear();
_UICol.Clear();
var n = Registry.ClassesRoot.GetSubKeyNames();
SystemFileType sf;
int x = 0;
int y;
var sn2 = new List <string>();
foreach (var sn in n)
{
if (sn.Substring(0, 1) == ".")
{
sn2.Add(sn);
}
}
y = sn2.Count;
foreach (var sn in sn2)
{
sf = SystemFileType.FromExtension(sn, this);
if (sf is object)
{
_Col.Add(sf);
x += 1;
if (fireEvent)
{
// If fireEvent AndAlso x Mod 10 = 0 Then
Populating?.Invoke(this, new FileTypeEnumEventArgs(sf, x, y));
System.Windows.Forms.Application.DoEvents();
}
}
}
var c = _Col.ToArray();
Array.Sort(c, new SysFileTypeComp());
_Col.Clear();
foreach (var cu in c)
{
_Col.Add(cu);
}
var d = _UICol.ToArray();
Array.Sort(d, new UIHandlerComp());
_UICol.Clear();
foreach (var du in d)
{
_UICol.Add(du);
}
OnPropertyChanged("UICollection");
OnPropertyChanged("FileTypes");
return(x);
}
/// <summary>
/// Creates a new <see cref="SystemFileType"/> object from the given extension with the specified parameters.
/// </summary>
/// <param name="ext">The file extension.</param>
/// <param name="parent">The parent <see cref="AllSystemFileTypes"/> object.</param>
/// <param name="size">The default icon size.</param>
/// <returns></returns>
public static SystemFileType FromExtension(string ext, AllSystemFileTypes parent = null, StandardIcons size = StandardIcons.Icon48)
{
var c = new SystemFileType(ext);
if (parent is object)
{
c.Parent = parent;
}
var assoc = NativeShell.EnumFileHandlers(ext);
if (assoc is null || assoc.Count() == 0)
{
return(null);
}
c.Populate(assoc, size);
if (c.Handlers.Count == 0)
{
return(null);
}
else
{
return(c);
}
}
/// <summary>
/// Create a new event object consisting of these variables.
/// </summary>
/// <param name="sf">The <see cref="SystemFileType"/> object</param>
/// <param name="index">The current index</param>
/// <param name="count">The total number of file types</param>
internal FileTypeEnumEventArgs(SystemFileType sf, int index, int count)
{
_sft = sf;
_index = index;
_count = count;
}
