private void Util_AddLayout(TreeNode soluNode, DB.ExcelXMLLayout layout)
{
TreeNode layoutNode = new TreeNode(layout.text);
layoutNode.Name = layout.path;
layoutNode.Tag = layout;
layoutNode.SelectedImageKey = layoutNode.ImageKey = "LAYOUT";
foreach (DB.ExcelXMLLayout.KeyPair kp in layout.EachKeyPair())
{
Util_AddKeyPair(layoutNode, kp);
}
soluNode.Nodes.Add(layoutNode);
}