// Adds expanders to the groups, should be called in form's Show-event
public void MakeCollapsable()
{
if (Environment.OSVersion.Version.Major < 6)
return;
foreach (ListViewGroup group in Groups)
{
var placeHolderGroup = new ExplorerListViewGroup();
placeHolderGroup.CbSize = Marshal.SizeOf(placeHolderGroup);
placeHolderGroup.State = ExplorerListViewGroupState.Collapsible;
placeHolderGroup.Mask = ExplorerListViewGroupMask.State;
placeHolderGroup.GroupId = GetGroupId(group);
if (placeHolderGroup.GroupId >= 0)
NativeMethods.SendMessage(Handle, LVM_SETGROUPINFO, new IntPtr(placeHolderGroup.GroupId), ref placeHolderGroup);
}
}
public void MakeCollapsable() // Adds expanders to the groups, should be called in form's Show-event
{
if (Environment.OSVersion.Version.Major < 6)
{
return;
}
foreach (ListViewGroup group in Groups)
{
var placeHolderGroup = new ExplorerListViewGroup();
placeHolderGroup.CbSize = Marshal.SizeOf(placeHolderGroup);
placeHolderGroup.State = ExplorerListViewGroupState.Collapsible;
placeHolderGroup.Mask = ExplorerListViewGroupMask.State;
placeHolderGroup.GroupId = GetGroupId(group);
if (placeHolderGroup.GroupId >= 0)
{
NativeMethods.SendMessage(Handle, LVM_SETGROUPINFO, new IntPtr(placeHolderGroup.GroupId), ref placeHolderGroup);
}
}
}
public static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, ref ExplorerListViewGroup lParam);