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