private void OnRemove(ShellOperationEventArgs e)
{
if (e.Item.IsFolder)
{
// delete a key
using (var key = OpenKey(true))
{
if (key != null)
{
key.DeleteSubKeyTree(e.Item.DisplayName, false);
}
}
e.HResult = ShellUtilities.S_OK;
return;
}
// delete a value
using (var key = OpenKey(true))
{
if (key != null)
{
var keyName = ((RegistryValueItem)e.Item).KeyName;
key.DeleteValue(keyName, false);
// deleting the default value will in fact unset its value, so we don't want explorer to remove the item visually
if (string.IsNullOrEmpty(keyName))
{
const int COPYENGINE_E_USER_CANCELLED = unchecked ((int)0x80270000);
e.HResult = COPYENGINE_E_USER_CANCELLED;
e.Item.NotifyUpdate();
}
}
}
e.HResult = ShellUtilities.S_OK;
}
private async void OnRename(ShellOperationEventArgs e)
{
if (e.Item.IsFolder)
{
// rename a key
using (var key = OpenKey(true))
{
if (key != null)
{
var path = System.IO.Path.Combine(Path ?? string.Empty, e.Item.DisplayName);
RegRenameKey(key.Handle, path, e.NewName);
e.NewId = new StringKeyShellItemId(e.NewName);
e.Item.NotifyRename(e.NewId);
e.HResult = ShellUtilities.S_OK;
}
}
return;
}
// rename a value (delete + set)
using (var key = OpenKey(true))
{
if (key != null)
{
if (key.GetValueNames().Contains(e.NewName, StringComparer.OrdinalIgnoreCase))
{
await WindowsUtilities.DoModelessAsync(() =>
{
MessageBox.Show(new Win32Window(e.HwndOwner), "The Registry Folder cannot rename '" + e.Item.DisplayName + "'. The specified value name already exists. Type another name and try again.", "Registry Folder", MessageBoxButtons.OK, MessageBoxIcon.Error);
});
}
else
{
var value = key.GetValue(e.Item.DisplayName);
if (value == null)
{
await WindowsUtilities.DoModelessAsync(() =>
{
MessageBox.Show(new Win32Window(e.HwndOwner), "The Registry Folder cannot rename '" + e.Item.DisplayName + "'. The specified value name does not exists. Refresh the view and try again.", "Registry Folder", MessageBoxButtons.OK, MessageBoxIcon.Error);
});
}
else
{
key.SetValue(e.NewName, value);
key.DeleteValue(e.Item.DisplayName, false);
e.NewId = new StringKeyShellItemId(e.NewName);
e.HResult = ShellUtilities.S_OK;
e.Item.Parent?.NotifyUpdate();
}
}
}
}
}
protected override void OnOperate(ShellOperationEventArgs e)
{
switch (e.Operation)
{
case ShellOperation.SetNameOf:
case ShellOperation.RenameItem:
OnRename(e);
break;
case ShellOperation.RemoveItem:
OnRemove(e);
break;
}
}
protected override void OnOperate(ShellOperationEventArgs e)
{
Console.WriteLine("OnOperate " + e.Operation);
}
protected override void OnOperate(ShellOperationEventArgs e)
{
// some advanced errors number can be found in %ProgramFiles(x86)%\Windows Kits\10\Include\<SDK Version>\um\sherrors.h (for example with SDK Version = 10.0.19041.0)
var item = (e.Item as IObjectWithApiItem)?.ApiItem;
switch (e.Operation)
{
case ShellOperation.RecycleItem:
// our recycle bin is only local (a server side recycle bin may be better, but not implemented here)
if (e.Item is IObjectWithApiItem si && e.Item.FileSystemPath != null)
{
// we copy the file in an accessible folder so the user will be able to get to it when pulling out from recycle bin
var recycledPath = si.ApiItem.Recycle();
using (var fo = new FileOperation())
{
fo.SetOperationFlags(FOF.FOFX_RECYCLEONDELETE);
fo.DeleteItem(recycledPath);
fo.PerformOperations();
}
if (item.DeleteAsync(e.Item.FileSystemPath, new DeleteOptions {
Recursive = true
}).Result)
{
// tell the Shell not to process children (in case of a folder), as the server did it (or failed)
const int COPYENGINE_S_DONT_PROCESS_CHILDREN = 0x00270008;
e.HResult = COPYENGINE_S_DONT_PROCESS_CHILDREN;
NotifyUpdate();
}
else
{
// we can only reuse well-known error, for example
e.HResult = ShellUtilities.ERROR_RETRY;
}
}
break;
case ShellOperation.RemoveItem:
if (item.DeleteAsync(e.Item.FileSystemPath, new DeleteOptions {
Recursive = true
}).Result)
{
// tell the Shell not to process children (in case of a folder), as the server did it (or failed)
const int COPYENGINE_S_DONT_PROCESS_CHILDREN = 0x00270008;
e.HResult = COPYENGINE_S_DONT_PROCESS_CHILDREN;
NotifyUpdate();
}
else
{
// we can only reuse well-known error, for example
e.HResult = ShellUtilities.ERROR_RETRY;
}
break;
case ShellOperation.RenameItem:
case ShellOperation.SetNameOf:
var result = item.RenameAsync(e.NewName, e.Item.FileSystemPath).Result;
if (result != null)
{
e.HResult = ShellUtilities.S_OK;
NotifyUpdate();
}
else
{
// we can only reuse well-known error, for example
e.HResult = ShellUtilities.ERROR_RETRY;
}
break;
}
base.OnOperate(e);
}
