/// <summary>
/// Set up the ListView Columns either using the Col Def list provided,
/// or generically with the object property definitions from object metadata
/// </summary>
private void SetUpListViewColumns()
{
var cols = new List <ColumnHeader>();
if (ListViewColDefs.Length > 0)
{
// use the list of predefined columns for the list view.
foreach (var colDef in ListViewColDefs.OrderBy(o => o.Order))
{
cols.Add(new ColumnHeader()
{
Name = colDef.Name,
Text = colDef.DisplayName,
DisplayIndex = colDef.Order,
Width = colDef.Width,
Tag = colDef
});
}
}
else if (ListItemType != null)
{
// render all of the properties for the bound list object type
PropertyInfo[] props = ListItemType.GetProperties();
foreach (PropertyInfo p in props)
{
cols.Add(new ColumnHeader()
{
Name = p.Name,
Text = p.Name,
Width = 100
});
}
}
// if the two are the same, then no need to reset
if (ListViewMain.Columns.Count == cols.Count)
{
var listCols = ListViewMain.Columns.Cast <ColumnHeader>().Select(c => c.Name);
if (cols.Select(c => c.Name).SequenceEqual(listCols))
{
return;
}
}
ListViewMain.SuspendLayout();
ListViewMain.Columns.Clear();
ListViewMain.Columns.AddRange(cols.ToArray());
ListViewMain.ResumeLayout();
}
/// <summary>
/// Filter the list using the text in the text box.
/// </summary>
private void FilterList()
{
string filterText = textFilterList.Text.ToLower();
List <ListViewItem> newList = null;
_performingBulkSelection = true;
ListViewMain.SuspendLayout();
// filter the cols
if (filterText.Length > 3)
{
// get the filter cols... this allows us to check the correct col for the value
// if none found, default to first col
var filterCols = ListViewColDefs.Where(c => c.IsFilterColumn == true).ToList();
if (filterCols.Count == 0)
{
filterCols = ListViewColDefs.OrderBy(c => c.Order).Take(1).ToList();
}
newList = new List <ListViewItem>();
foreach (var col in filterCols)
{
// filter the master list and bind it to the list view. Col 0 is the text while the rest are subitems/cols
var curr = _listViewItemsColl
.Where(i => (col.Order == 0) ?
i.Text.ToLower().Contains(filterText) :
i.SubItems[col.Name].Text.ToLower().Contains(filterText)
);
// add to the current list
newList.AddRange(curr.Except(newList));
}
}
else
{
if (ListViewMain.Items.Count != _listViewItemsColl.Count)
{
newList = _listViewItemsColl;
}
}
// if we have a new list to be set, clear and reset groups
if (newList != null)
{
ListViewMain.Items.Clear();
ListViewMain.Items.AddRange(newList.ToArray <ListViewItem>());
var props = ListItemType.GetProperties().ToDictionary(p => p.Name, p => p);
// now reset the group for each list item
foreach (var item in newList)
{
item.Group = GetListItemGroup(item.Tag, props);
}
// now that we have an updated list view, udpate the list of selected items
UpdateSelectedItemsList();
}
_performingBulkSelection = false;
ListViewMain.ResumeLayout();
FilterListComplete?.Invoke(this, new EventArgs());
}