TreeList.CustomColumnSort Event
Allows you to apply custom sorting for those Tree List columns whose TreeListColumn.SortMode is set to Custom.
Namespace: DevExpress.XtraTreeList
Assembly: DevExpress.XtraTreeList.v24.2.dll
#Declaration
#Event Data
The CustomColumnSort event's data class is DevExpress.XtraTreeList.CustomColumnSortEventArgs.
#Remarks
The CustomColumnSort
event fires when a user sorts nodes against a column (clicks a column header or invokes the corresponding command in the column header context menu) or when the TreeListColumn.SortOrder property value changes.
#Example
The code below implements a custom sorting algorithm for a Tree List column via the TreeList.CustomColumnSort
event.
The sorting procedure arranges nodes that have children above the nodes that do not have children.
The images below display the control sorted by the Department column in ascending and descending order. Notice that the Finance node is always located under nodes that have children.
using DevExpress.XtraTreeList;
treeList1.Columns["Department"].SortMode = DevExpress.XtraGrid.ColumnSortMode.Custom;
private void TreeList1_CustomColumnSort(object sender, DevExpress.XtraTreeList.CustomColumnSortEventArgs e) {
if (e.Node1.HasChildren && !e.Node2.HasChildren)
e.Result = e.SortOrder == SortOrder.Ascending ? -1 : 1;
if (!e.Node1.HasChildren && e.Node2.HasChildren)
e.Result = e.SortOrder == SortOrder.Ascending ? 1 : -1;
}