主题：IsNode 属性怎么设定？

To obtain a Node object, you can either:

Use the return value of the Rows.InsertNode method:

var node = _flex.Rows.InsertNode(index, level);

		

Or you can retrieve the node for an existing row using the row's Node property:

var node = _flex.Rows[index].IsNode
   ? _flex.Rows[index].Node
   : null;