private void AddNodes(DataTable dt, Type type)
{
DataRow[] dr;
if (TRoot == null)
{
var property = type.Property(TParentId.ToString());
if (property != null && !property.PropertyType.IsValueType && property.PropertyType != typeof(string))
{
TRoot = Activator.CreateInstance(property.PropertyType);
}
}
if (TRoot != null)
{
dr = dt.Select(string.Format("[{0}] = '{1}'", TId, TRoot));
if (dr.Length > 0)
{
throw new PawayException("Child node cannot be the same as the root node.");
}
dr = dt.Select(string.Format("[{0}] = '{1}'", TParentId, TRoot));
}
else
{
dr = dt.Select(string.Format("[{0}] is null", TParentId));
}
for (var i = 0; i < dr.Length; i++)
{
var node = CreateNode(dr[i]);
Nodes.Add(node);
AddNodes(dt, node);
}
}
/// <summary>
/// 刷新Node
/// </summary>
public void UpdateNode(object id)
{
if (id == null || _dataSource == null || TId == null || TParentId == null)
{
return;
}
DataTable dt = null;
if (_dataSource is DataTable)
{
dt = _dataSource as DataTable;
}
else if (_dataSource is IList list)
{
dt = list.ToDataTable();
}
if (dt == null)
{
return;
}
var dr = dt.Select(string.Format("{0} = '{1}'", TId, id));
if (dr.Length == 1)
{
var nodes = Nodes.Find(id.ToString(), true);
if (nodes.Length == 1)
{
UpdateNode(Nodes, dr[0], id.ToString());
}
else if (nodes.Length == 0)
{
var parent = dr[0][TParentId.ToString()].ToString();
if (!AddNode(Nodes, dr[0], parent))
{
AddNode(Nodes, dr[0]);
}
}
}
else if (dr.Length == 0)
{
DeleteNode(Nodes, id.ToString());
}
}
