C#树形结构的保存与加载(二)

添加控件：

treeView1

button2

button3

保存代码如下：

private void xmlTreeSave(string xmlName)
        {
            //保存和读取TREE VIEW的状态
            //创建一个 XmlDocument 对象
            XmlDocument xmlDocument = new XmlDocument();

            //创建一个 XmlElement 对象，并将其设置为根元素
            XmlElement rootElement = xmlDocument.CreateElement("TreeViewState");
            xmlDocument.AppendChild(rootElement);

            foreach (TreeNode node in treeView1.Nodes)
            {
                XmlElement element = xmlDocument.CreateElement("Node");
                element.SetAttribute("Text", node.Text);
                element.SetAttribute("Checked", node.Checked.ToString());

                foreach (TreeNode childNode in node.Nodes)
                {
                    XmlElement childElement = xmlDocument.CreateElement("ChildNode");
                    childElement.SetAttribute("Text", childNode.Text);
                    childElement.SetAttribute("Checked", childNode.Checked.ToString());

                    element.AppendChild(childElement);
                }

                rootElement.AppendChild(element);
            }

            xmlDocument.Save(xmlName);
        }

加载代码如下：

private void xmlTreeLoad(string xmlName)
        {
            treeView1.Nodes.Clear();
            //加载 XML 文件并创建一个 XmlDocument 对象。
            XmlDocument xmlDocument = new XmlDocument();
            xmlDocument.Load(xmlName);

            XmlElement rootElement = xmlDocument.DocumentElement;

            foreach (XmlElement element in rootElement.ChildNodes)
            {
                TreeNode node = new TreeNode(element.GetAttribute("Text"));
                node.Checked = Convert.ToBoolean(element.GetAttribute("Checked"));

                foreach (XmlElement childElement in element.ChildNodes)
                {
                    TreeNode childNode = new TreeNode(childElement.GetAttribute("Text"));
                    childNode.Checked = Convert.ToBoolean(childElement.GetAttribute("Checked"));

                    node.Nodes.Add(childNode);
                }
                treeView1.Nodes.Add(node);
            }
        }

调用：

        private void button2_Click(object sender, EventArgs e)
        {
            xmlTreeSave("TreeViewState.xml");
        }
        private void button3_Click(object sender, EventArgs e)
        {
            xmlTreeLoad("TreeViewState.xml");
        }