TreeView控件使用总结
刚开始接触TreeView控件的时候，感觉很苦恼，因为要像下面的方式来填充它：
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
public partial class ascx_ReleaseMenuManage : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Dispaly();
GetParentNodes();
}
}
private void Dispaly()
{
IList<Node> parents = GetData("0");
foreach (Node parent in parents)
{
TreeNode parentnode = this.CreateTreeNode(parent.Name, parent.ID, parent.Url);
CreateChildNode(parent.ID, parentnode);
TreeView1.Nodes.Add(parentnode);
}
}
private TreeNode CreateTreeNode(string funname, string id, string url)
{
TreeNode newNode = new TreeNode();
newNode.Text = funname;
newNode.Value = id;
//newNode.NavigateUrl = ResolveUrl(url.Trim());
return newNode;
}
private void CreateChildNode(string nodeid, TreeNode parentnode)
{
IList<Node> children = GetData(nodeid);
foreach (Node child in children)
{
TreeNode childnode = this.CreateTreeNode(child.Name, child.ID, child.Url);
CreateChildNode(child.ID, childnode);
AddTree(parentnode, childnode);
}
}
private void AddTree(TreeNode fathernode, TreeNode chilenode)
{
fathernode.ChildNodes.Add(chilenode);
}
private IList<Node> GetData(string id)
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ToString());
SqlCommand cmd = new SqlCommand("select funid,funname,funurl from releasefuninfo where fatherid=@id", con);
cmd.Parameters.AddWithValue("id", id);
con.Open();
SqlDataReader reader = cmd.ExecuteReader();
List<Node> nodes = new List<Node>();
while (reader.Read())
{
Node n = new Node();
n.ID = reader["funid"].ToString();
n.Name = reader["funname"].ToString();
n.Url = reader["funurl"].ToString();
nodes.Add(n);
}
return nodes;
}
protected void TreeView1_SelectedNodeChanged1(object sender, EventArgs e)
{
string current = ((TreeView)sender).SelectedNode.Value;
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ToString());
SqlCommand cmd = new SqlCommand("select funname,funurl,displayid from releasefuninfo where funid=@id", con);
cmd.Parameters.AddWithValue("id", current);
con.Open();
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
txtMenu_Name.Text = reader["funname"].ToString();
txtMenu_http.Text = reader["funurl"].ToString();
if (reader["displayid"].ToString() == "1")
{
chkMenu_Lock.Checked = true;
}
else
{
chkMenu_Lock.Checked = false;
}
}
}
private void GetParentNodes()
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ToString());
SqlCommand cmd = new SqlCommand("select funid, funname from releasefuninfo where fatherid=0", con);
con.Open();
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
ListItem item=new ListItem();
item.Text = reader["funname"].ToString();
item.Value = reader["funid"].ToString();
txtMenu_FaterID.Items.Add(item);
}
con.Close();
}
public class Node
{
public string ID { get; set; }
public string Name { get; set; }
public string Url { get; set; }
}
}
嘿嘿 ，最近终于找到一个简洁的方式来填充它了，很是开心，代码如下：
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
public partial class TreeViewTest : System.Web.UI.Page
{
DataSet ds ;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ds = new DataSet();
SqlConnection con = new SqlConnection(SqlHelp.Constr);
SqlDataAdapter sda = new SqlDataAdapter("select * from releasefuninfo", con);
sda.Fill(ds);
GridView1.DataSource = ds.Tables[0].DefaultView;
GridView1.DataBind();
AddNode(TreeView1.Nodes, "0");
}
}
private void AddNode(TreeNodeCollection nodes, string id)
{
DataView dv = new DataView();
dv.Table = ds.Tables[0];
dv.RowFilter = "fatherid=" + "'" + id + "'";
TreeNode tn;
foreach (DataRowView v in dv)
{
tn = new TreeNode();
tn.Value = v["funid"].ToString();
tn.Text = v["funname"].ToString();
tn.NavigateUrl = ResolveUrl( v["funurl"].ToString());
nodes.Add(tn);
AddNode(tn.ChildNodes, tn.Value);
}
}
}
