c#在treeview中添加了父节点后怎么把父节点的子节点动态添加进去,
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TreeNode gen = new TreeNode();//根节点
gen.Text = "xxx";
gen.Value = "xxx";
TreeView1.Nodes.Add(gen);
TreeNode sec = new TreeNode();//子节点，可以循环
sec.Text = "xxx";
sec.Value = "xxx";
gen.ChildNodes.Add(sec);
