private void OnDragDrop(object sender, DragEventArgs e)
{
IDataObject data = e.Data;
TreeListNode childNode = (TreeListNode)data.GetData(typeof(TreeListNode));
if (childNode == null)
{
return;
}
TreeList list = (TreeList)sender;
DXDragEventArgs args = list.GetDXDragEventArgs(e);
DragInsertPosition position = args.DragInsertPosition;
TreeListNode parentNode = args.TargetNode;
int id;
// Get drop position
if (position == DragInsertPosition.Before || position == DragInsertPosition.After)
{
if (parentNode.ParentNode != null)
{
id = parentNode.ParentNode.Nodes.IndexOf(parentNode);
}
else
{
id = list.Nodes.IndexOf(parentNode);
}
parentNode = parentNode.ParentNode;
}
else
{
id = parentNode.Nodes.Count;
}
BaseEntity childEntity = (BaseEntity)childNode.Tag;
BaseEntity parentEntity = (parentNode != null ? (BaseEntity)parentNode.Tag : null);
// Remove node from old parent
if (childEntity.parent != null)
{
childEntity.parent.children.Remove(childEntity);
}
else
{
entities.Remove(childEntity);
}
// Add node to new parent
if (parentEntity != null)
{
parentEntity.children.Insert(id, childEntity);
}
else
{
entities.Insert(id, childEntity);
}
childEntity.parent = parentEntity;
}
// Add a node to the TreeList when a grid row is dropped.
private void treeList_DragDrop(object sender, DragEventArgs e)
{
// Get extended arguments of the drag event.
DXDragEventArgs args = treeList.GetDXDragEventArgs(e);
// Get how a node is inserted (as a child, before or after a node, or at the end of the node collection).
DragInsertPosition position = args.DragInsertPosition;
Person dataRow = e.Data.GetData(typeof(DragAndDropRows.Person)) as Person;
if (dataRow == null)
{
return;
}
int parentID = (int)treeList.RootValue;
// Get the node over which the row is dropped.
TreeListNode node = args.TargetNode;
// Add a node at the root level.
if (node == null)
{
treeList.AppendNode((new PersonEx(dataRow, parentID)).ToArray(), null);
}
else
{
// Add a child node to the target node.
if (position == DragInsertPosition.AsChild)
{
parentID = Convert.ToInt32(node.GetValue("ID"));
Object[] targetObject = (new PersonEx(dataRow, parentID)).ToArray();
treeList.AppendNode(targetObject, node);
}
// Insert a node before the taget node.
if (position == DragInsertPosition.Before)
{
parentID = Convert.ToInt32(node.GetValue("ParentID"));
Object[] targetObject = (new PersonEx(dataRow, parentID)).ToArray();
TreeListNode newNode = treeList.AppendNode(targetObject, node.ParentNode);
int targetPosition;
if (node.ParentNode == null)
{
targetPosition = treeList.Nodes.IndexOf(node);
}
else
{
targetPosition = node.ParentNode.Nodes.IndexOf(node);
}
treeList.SetNodeIndex(newNode, targetPosition);
}
node.Expanded = true;
}
}
private void tlCategory_DragDrop(object sender, DragEventArgs e)
{
TreeListNode dragNode = (TreeListNode)e.Data.GetData(typeof(TreeListNode));
if (dragNode == null)
{
return;
}
TreeList myTree = (TreeList)sender;
TreeListHitInfo hitInfo = myTree.CalcHitInfo(myTree.PointToClient(new Point(e.X, e.Y)));
if (hitInfo.Node == null)
{
return;
}
var targetNode = hitInfo.Node;
bool?isPeer = null;
DragInsertPosition dip = this.tlCategory.GetDragInsertPosition();
switch (dip)
{
case DragInsertPosition.AsChild:
isPeer = false;
break;
case DragInsertPosition.Before:
case DragInsertPosition.After:
isPeer = true;
break;
case DragInsertPosition.None:
default:
break;
}
if (!isPeer.HasValue)
{
return;
}
var newParentId = 0;
if (isPeer.Value)
{
newParentId = Convert.ToInt32(targetNode.GetValue(tcParentId));
}
else
{
newParentId = Convert.ToInt32(targetNode.GetValue(tcId));
}
var connString = System.Configuration.ConfigurationManager.ConnectionStrings["CTMContext"].ToString();
var commandText = $@"UPDATE DecisionReasonCategory SET ParentId = {newParentId} WHERE Id = {Convert.ToInt32(dragNode.GetValue(tcId))}";
SqlHelper.ExecuteNonQuery(connString, CommandType.Text, commandText);
this.tlCategory.ExpandAll();
//BindCategory();
}