public bool Regroup()
{
try
{
ListViewAPI.ClearListViewGroup(this);
foreach (XPListViewGroup grp in this.Groups)
{
ListViewAPI.AddListViewGroup(this, grp.GroupText, grp.GroupIndex);
}
foreach (XPListViewItem itm in this.Items)
{
ListViewAPI.AddItemToGroup(this, itm.Index, itm.GroupIndex);
}
int param = 0;
ListViewAPI.SendMessage(this.Handle, ListViewAPI.LVM_ENABLEGROUPVIEW, 1, ref param);
_showInGroups = true;
_autoGroup = false;
_autoGroupCol = null;
_autoGroupList.Clear();
return(true);
}
catch (Exception ex)
{
throw new SystemException("Error in XPListView.Regroup: " + ex.Message);
}
}
public bool AutoGroupByColumn(int columnID)
{
if (columnID >= this.Columns.Count || columnID < 0)
{
return(false);
}
try
{
_autoGroupList.Clear();
foreach (XPListViewItem itm in this.Items)
{
if (
!_autoGroupList.Contains(itm.SubItems[columnID].Text == ""
? _emptyAutoGroupText
: itm.SubItems[columnID].Text))
{
_autoGroupList.Add(itm.SubItems[columnID].Text == "" ? EmptyAutoGroupText : itm.SubItems[columnID].Text);
}
}
_autoGroupList.Sort();
ListViewAPI.ClearListViewGroup(this);
foreach (string text in _autoGroupList)
{
ListViewAPI.AddListViewGroup(this, text, _autoGroupList.IndexOf(text));
}
foreach (XPListViewItem itm in this.Items)
{
ListViewAPI.AddItemToGroup(this, itm.Index,
_autoGroupList.IndexOf(itm.SubItems[columnID].Text == ""
? _emptyAutoGroupText
: itm.SubItems[columnID].Text));
}
int param = 0;
ListViewAPI.SendMessage(this.Handle, ListViewAPI.LVM_ENABLEGROUPVIEW, 1, ref param);
_showInGroups = true;
_autoGroup = true;
_autoGroupCol = this.Columns[columnID];
this.Refresh();
return(true);
}
catch (Exception ex)
{
throw new SystemException("Error in XPListView.AutoGroupByColumn: " + ex.Message);
}
}
public new void Clear()
{
ListViewAPI.ClearListViewGroup(_owner);
List.Clear();
}