asp.net Treeview节点保存成XML文件

递归treeview的节点，并保存成XML文件，让treeview无限级分类读取节点速度比较快

//生成XML文件

using System.Xml;

protected void Button1_Click(object sender, EventArgs e)

{

try

{

Init_Tree();

save();

Page.ClientScript.RegisterStartupScript(Page.GetType(), "ajaxjs", "alert('前台产品分类更新成功！')", true);

Button1.Enabled = false;

}

catch (Exception ex)

{

Page.ClientScript.RegisterStartupScript(Page.GetType(), "ajaxjs", "alert('前台产品分类更新失败！')", true);

}

}

XmlDocument doc = new XmlDocument();

//遍历XML根节点

private void save()

{

// XmlTextWriter objXml = new XmlTextWriter(Server.MapPath("../XMLTest.xml"), null);

doc.LoadXml("<XMLTest></XMLTest>");

XmlNode root = doc.SelectSingleNode("XMLTest");

foreach (TreeNode tn in TreeView_Tree.Nodes)

{

XmlElement Test = doc.CreateElement("treenode");

XmlAttribute cid = doc.CreateAttribute("cid");

cid.InnerText = tn.Value;

Test.SetAttributeNode(cid);

XmlAttribute treenodename = doc.CreateAttribute("name");

treenodename.InnerText = tn.Text;

Test.SetAttributeNode(treenodename);

XmlAttribute treenodeUrl = doc.CreateAttribute("url");

treenodeUrl.InnerText = tn.NavigateUrl;

Test.SetAttributeNode(treenodeUrl);

root.AppendChild(Test);

if (tn.ChildNodes != null)

{

ChildNods(tn, Test);

}

}

doc.Save(Server.MapPath("../XMLTest.xml"));

}

//遍历XML子节点

private void ChildNods(TreeNode ParentNode, XmlElement Test)

{

foreach (TreeNode tn in ParentNode.ChildNodes)

{

XmlElement Ts = doc.CreateElement("treenode");

XmlAttribute cid = doc.CreateAttribute("cid");

cid.InnerText = tn.Value;

Ts.SetAttributeNode(cid);

XmlAttribute treenode2name = doc.CreateAttribute("name");

treenode2name.InnerText = tn.Text;

Ts.SetAttributeNode(treenode2name);

XmlAttribute treenode2Url = doc.CreateAttribute("url");

treenode2Url.InnerText = tn.NavigateUrl;

Ts.SetAttributeNode(treenode2Url);

Test.AppendChild(Ts);

if (tn.ChildNodes != null)

{

ChildNods(tn, Ts);

}

}

}

protected void Init_Tree()

{

//获取Faq树形目录节点

string sqlstr = "select * from Content_Class order by ClassOrder asc,cid desc";

DataSet DataSet_Tree = access_sql.GreatDs(sqlstr);

this.ViewState["DataSet_Tree"] = DataSet_Tree;

//调用递归函数，完成树形结构的生成

AddTree("0", (TreeNode)null);

}

//递归添加树的节点 参数ParentID为树的最大父结点

public void AddTree(string ParentID, TreeNode pNode)

{

DataSet DataSet_Tree = (DataSet)this.ViewState["DataSet_Tree"];

DataView DataView_Tree = new DataView(DataSet_Tree.Tables[0]);

//过滤ParentID,得到当前的所有子节点 ParentID为父节点ID

DataView_Tree.RowFilter = " ClassPre= '" + ParentID + "' ";

DataView_Tree.Sort = " ClassOrder ASC ";

//循环递归

foreach (DataRowView Row in DataView_Tree)

{

//声明节点

TreeNode Node = new TreeNode();

//绑定超级链接

// Node.NavigateUrl = baseinfo.Getpclassurl(Row["classname"].ToString(), Row["cid"].ToString());

string classname = access_sql.GetOneValue("select ClassName from Content_Class where cID=" + Row["cid"].ToString());

Node.NavigateUrl = baseinfo.Getpclassurl(classname, Row["cid"].ToString());

bool flag = false;

//开始递归

if (pNode == null)

{

//添加根节点

Node.Text = Row["classname"].ToString();

Node.Value = Row["cid"].ToString();

TreeView_Tree.Nodes.Add(Node);

Node.Expanded = flag; //节点状态闭

AddTree(Row["ClassId"].ToString(), Node); //再次递归

}

else

{

//添加当前节点的子节点

Node.Text = Row["classname"].ToString();

Node.Value = Row["cid"].ToString();

pNode.ChildNodes.Add(Node);

Node.Expanded = flag; //节点状态闭

AddTree(Row["ClassId"].ToString(), Node); //再次递归

}

}

}