学了这么久的.NET了,还没有用过TREEVIEW控件,今天就下了IEWEBCONTROL学了学怎么用TREEVIEW,
写了个简单的二级树.
下面是ASP.CS文件
写了个简单的二级树.
create table tree
(
id int identity(1,1) primary key,
childID int default 0,--这里定义时写错了,应该用parentID
title varchar(50) not null,
url varchar(100)
)
insert into tree (childID,title,url) values (2,'节点1','http://www.163.com')
insert into tree (childID,title,url) values (0,'节点2','http://www.163.com')
insert into tree (childID,title,url) values (2,'节点3','http://www.163.com')
insert into tree (childID,title,url) values (9,'节点4','http://www.163.com')
insert into tree (childID,title,url) values (2,'节点5','http://www.163.com')
insert into tree (childID,title,url) values (2,'节点6','http://www.163.com')
insert into tree (childID,title,url) values (9,'节点7','http://www.163.com')
insert into tree (childID,title,url) values (9,'节点8','http://www.163.com')
insert into tree (childID,title,url) values (0,'节点9','http://www.163.com')
(
id int identity(1,1) primary key,
childID int default 0,--这里定义时写错了,应该用parentID
title varchar(50) not null,
url varchar(100)
)
insert into tree (childID,title,url) values (2,'节点1','http://www.163.com')
insert into tree (childID,title,url) values (0,'节点2','http://www.163.com')
insert into tree (childID,title,url) values (2,'节点3','http://www.163.com')
insert into tree (childID,title,url) values (9,'节点4','http://www.163.com')
insert into tree (childID,title,url) values (2,'节点5','http://www.163.com')
insert into tree (childID,title,url) values (2,'节点6','http://www.163.com')
insert into tree (childID,title,url) values (9,'节点7','http://www.163.com')
insert into tree (childID,title,url) values (9,'节点8','http://www.163.com')
insert into tree (childID,title,url) values (0,'节点9','http://www.163.com')
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using Microsoft.Web.UI.WebControls;
namespace xmlDemo
{
/// <summary>
/// treeDemo 的摘要说明。
/// </summary>
public class treeDemo : System.Web.UI.Page
{
protected Microsoft.Web.UI.WebControls.TreeView Tree;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
BindTree();
}
DataTable GetTable( string sql)
{
SqlConnection conn=new SqlConnection("server=.;database=tree;uid=sa;pwd=;");
SqlDataAdapter da=new SqlDataAdapter(sql,conn);
DataSet ds=new DataSet();
da.Fill(ds);
return ds.Tables[0];
}
void BindTree()
{
this.Tree.Nodes.Clear();
TreeNode tn=new TreeNode();
tn.Text="终极接点";
tn.Expanded=true;
Tree.Nodes.Add(tn);
DataTable dt=GetTable("select * from tree where childID=0");//一级根结点
foreach(DataRow dr in dt.Rows)
{
TreeNode cld=CreateNode(dr["title"].ToString(),dr["Url"].ToString(),tn);
DataTable dt1=GetTable("select * from tree where childID="+dr[0].ToString());//一级子结点
if(dt1.Rows.Count>0)
{
foreach(DataRow dr1 in dt1.Rows)
{
CreateNode(dr1["title"].ToString(),dr1["Url"].ToString(),cld);
}
}
}
}
TreeNode CreateNode(string nodeText,string Url,TreeNode tn)
{
TreeNode cld=new TreeNode();
cld.Text=nodeText;
cld.NavigateUrl=Url;
cld.Target="_blank";
tn.Nodes.Add(cld);
return cld;
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using Microsoft.Web.UI.WebControls;
namespace xmlDemo
{
/// <summary>
/// treeDemo 的摘要说明。
/// </summary>
public class treeDemo : System.Web.UI.Page
{
protected Microsoft.Web.UI.WebControls.TreeView Tree;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
BindTree();
}
DataTable GetTable( string sql)
{
SqlConnection conn=new SqlConnection("server=.;database=tree;uid=sa;pwd=;");
SqlDataAdapter da=new SqlDataAdapter(sql,conn);
DataSet ds=new DataSet();
da.Fill(ds);
return ds.Tables[0];
}
void BindTree()
{
this.Tree.Nodes.Clear();
TreeNode tn=new TreeNode();
tn.Text="终极接点";
tn.Expanded=true;
Tree.Nodes.Add(tn);
DataTable dt=GetTable("select * from tree where childID=0");//一级根结点
foreach(DataRow dr in dt.Rows)
{
TreeNode cld=CreateNode(dr["title"].ToString(),dr["Url"].ToString(),tn);
DataTable dt1=GetTable("select * from tree where childID="+dr[0].ToString());//一级子结点
if(dt1.Rows.Count>0)
{
foreach(DataRow dr1 in dt1.Rows)
{
CreateNode(dr1["title"].ToString(),dr1["Url"].ToString(),cld);
}
}
}
}
TreeNode CreateNode(string nodeText,string Url,TreeNode tn)
{
TreeNode cld=new TreeNode();
cld.Text=nodeText;
cld.NavigateUrl=Url;
cld.Target="_blank";
tn.Nodes.Add(cld);
return cld;
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}