private void OnDragDrop(object sender, DevExpress.Utils.DragDrop.DragDropEventArgs e)
{
var indexes = e.GetData <IEnumerable <int> >();
if (indexes == null)
{
return;
}
var destNode = GetDestNode(e.Location);
int destIndex = CalcDestNodeIndex(e, destNode);
treeList.BeginUpdate();
foreach (int _index in indexes)
{
var person = gridDataSource[_index];
int parentID = -1;
if (destNode != null)
{
parentID = (int)destNode["ID"];
}
TreeListNode node = treeList.AppendNode(new PersonEx(person, parentID).ToArray(), destIndex == -1000 ? destNode : null);
if (destIndex > -1)
{
treeList.MoveNode(node, destNode.ParentNode, true, destIndex);
destIndex++;
}
if (node.ParentNode != null)
{
node.ParentNode.Expand();
}
}
treeList.EndUpdate();
}
private void Behavior_DragDrop(object sender, DevExpress.Utils.DragDrop.DragDropEventArgs e)
{
GridView targetGrid = e.Target as GridView;
GridView sourceGrid = e.Source as GridView;
if (e.Action == DragDropActions.None || targetGrid != sourceGrid)
{
return;
}
DataTable sourceTable = sourceGrid.GridControl.DataSource as DataTable;
Point hitPoint = targetGrid.GridControl.PointToClient(Cursor.Position);
GridHitInfo hitInfo = targetGrid.CalcHitInfo(hitPoint);
int[] sourceHandles = e.GetData <int[]>();
int targetRowHandle = hitInfo.RowHandle;
int targetRowIndex = targetGrid.GetDataSourceRowIndex(targetRowHandle);
List <DataRow> draggedRows = new List <DataRow>();
foreach (int sourceHandle in sourceHandles)
{
int oldRowIndex = sourceGrid.GetDataSourceRowIndex(sourceHandle);
DataRow oldRow = sourceTable.Rows[oldRowIndex];
draggedRows.Add(oldRow);
}
int newRowIndex;
switch (e.InsertType)
{
case InsertType.Before:
newRowIndex = targetRowIndex > sourceHandles[sourceHandles.Length - 1] ? targetRowIndex - 1 : targetRowIndex;
for (int i = draggedRows.Count - 1; i >= 0; i--)
{
DataRow oldRow = draggedRows[i];
DataRow newRow = sourceTable.NewRow();
newRow.ItemArray = oldRow.ItemArray;
sourceTable.Rows.Remove(oldRow);
sourceTable.Rows.InsertAt(newRow, newRowIndex);
}
break;
case InsertType.After:
newRowIndex = targetRowIndex < sourceHandles[0] ? targetRowIndex + 1 : targetRowIndex;
for (int i = 0; i < draggedRows.Count; i++)
{
DataRow oldRow = draggedRows[i];
DataRow newRow = sourceTable.NewRow();
newRow.ItemArray = oldRow.ItemArray;
sourceTable.Rows.Remove(oldRow);
sourceTable.Rows.InsertAt(newRow, newRowIndex);
}
break;
default:
newRowIndex = -1;
break;
}
int insertedIndex = targetGrid.GetRowHandle(newRowIndex);
targetGrid.FocusedRowHandle = insertedIndex;
targetGrid.SelectRow(targetGrid.FocusedRowHandle);
}