private static void setGrpState(ListViewGroup listViewGroup, ListViewGroupState state)
{
if (Environment.OSVersion.Version.Major < 6) //Only Vista and forward
// allows collapse of ListViewGroups
{
return;
}
if (listViewGroup == null || listViewGroup.ListView == null)
{
return;
}
if (listViewGroup.ListView.InvokeRequired)
{
listViewGroup.ListView.Invoke(new CallBackSetGroupState(setGrpState),
listViewGroup, state);
}
else
{
int? groupId = GetGroupID(listViewGroup);
int gIndex = listViewGroup.ListView.Groups.IndexOf(listViewGroup);
LVGROUP group = new LVGROUP();
group.CbSize = Marshal.SizeOf(group);
group.State = state;
group.Mask = ListViewGroupMask.State;
if (groupId != null)
{
group.IGroupId = groupId.Value;
SendMessage(listViewGroup.ListView.Handle,
LVM_SETGROUPINFO, groupId.Value, group);
SendMessage(listViewGroup.ListView.Handle,
LVM_SETGROUPINFO, groupId.Value, group);
}
else
{
group.IGroupId = gIndex;
SendMessage(listViewGroup.ListView.Handle, LVM_SETGROUPINFO, gIndex, group);
SendMessage(listViewGroup.ListView.Handle, LVM_SETGROUPINFO, gIndex, group);
}
listViewGroup.ListView.Refresh();
}
}
private static void setGroupFooter(ListViewGroup listViewGroup, string footer)
{
if (Environment.OSVersion.Version.Major < 6) //Only Vista and forward
//allows footer on ListViewGroups
{
return;
}
if (listViewGroup == null || listViewGroup.ListView == null)
{
return;
}
if (listViewGroup.ListView.InvokeRequired)
{
listViewGroup.ListView.Invoke(new CallbackSetGroupString(setGroupFooter),
listViewGroup, footer);
}
else
{
int? GrpId = GetGroupID(listViewGroup);
int gIndex = listViewGroup.ListView.Groups.IndexOf(listViewGroup);
LVGROUP group = new LVGROUP();
group.CbSize = Marshal.SizeOf(group);
group.PszFooter = footer;
group.Mask = ListViewGroupMask.Footer;
if (GrpId != null)
{
group.IGroupId = GrpId.Value;
SendMessage(listViewGroup.ListView.Handle,
LVM_SETGROUPINFO, GrpId.Value, group);
}
else
{
group.IGroupId = gIndex;
SendMessage(listViewGroup.ListView.Handle, LVM_SETGROUPINFO, gIndex, group);
}
}
}
private static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, LVGROUP lParam);
private static void setGrpState(ListViewGroup listViewGroup, ListViewGroupState state)
{
if (Environment.OSVersion.Version.Major < 6) //Only Vista and forward
// allows collapse of ListViewGroups
return;
if (listViewGroup == null || listViewGroup.ListView == null)
return;
if (listViewGroup.ListView.InvokeRequired)
listViewGroup.ListView.Invoke(new CallBackSetGroupState(setGrpState),
listViewGroup, state);
else
{
int? groupId = GetGroupID(listViewGroup);
int gIndex = listViewGroup.ListView.Groups.IndexOf(listViewGroup);
LVGROUP group = new LVGROUP();
group.CbSize = Marshal.SizeOf(group);
group.State = state;
group.Mask = ListViewGroupMask.State;
if (groupId != null)
{
group.IGroupId = groupId.Value;
SendMessage(listViewGroup.ListView.Handle,
LVM_SETGROUPINFO, groupId.Value, group);
SendMessage(listViewGroup.ListView.Handle,
LVM_SETGROUPINFO, groupId.Value, group);
}
else
{
group.IGroupId = gIndex;
SendMessage(listViewGroup.ListView.Handle, LVM_SETGROUPINFO, gIndex, group);
SendMessage(listViewGroup.ListView.Handle, LVM_SETGROUPINFO, gIndex, group);
}
listViewGroup.ListView.Refresh();
}
}
private static void setGroupFooter(ListViewGroup listViewGroup, string footer)
{
if (Environment.OSVersion.Version.Major < 6) //Only Vista and forward
//allows footer on ListViewGroups
return;
if (listViewGroup == null || listViewGroup.ListView == null)
return;
if (listViewGroup.ListView.InvokeRequired)
listViewGroup.ListView.Invoke(new CallbackSetGroupString(setGroupFooter),
listViewGroup, footer);
else
{
int? GrpId = GetGroupID(listViewGroup);
int gIndex = listViewGroup.ListView.Groups.IndexOf(listViewGroup);
LVGROUP group = new LVGROUP();
group.CbSize = Marshal.SizeOf(group);
group.PszFooter = footer;
group.Mask = ListViewGroupMask.Footer;
if (GrpId != null)
{
group.IGroupId = GrpId.Value;
SendMessage(listViewGroup.ListView.Handle,
LVM_SETGROUPINFO, GrpId.Value, group);
}
else
{
group.IGroupId = gIndex;
SendMessage(listViewGroup.ListView.Handle, LVM_SETGROUPINFO, gIndex, group);
}
}
}
private static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, LVGROUP lParam);
