在左边源里面只需要拖一个树节点的控件，在查看代码中写以下代码：
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
...{
protected void Page_Load(object sender, EventArgs e)
...{
if (!Page.IsPostBack)
...{
this.buildTreeNode();
}
}
protected DataSet getDataSet(string id) //链接数据库
...{
string sql = "select * from treetest where parentid = " + Convert.ToInt32(id);
SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=TeacherTest;Integrated Security=True");
SqlCommand cmd = new SqlCommand(sql, con);
SqlDataAdapter adapter = new SqlDataAdapter();
DataSet ds = new DataSet();
adapter.SelectCommand = cmd;
adapter.Fill(ds);
return ds;
}
protected void buildTreeNode() //创建一个新的树节点将数据库中的text字段为0的内容写入
...{
DataSet ds = getDataSet("0");
DataTable dt = ds.Tables[0];
foreach (DataRow row in dt.Rows)
...{
TreeNode tn = new TreeNode();
tn.Text = row["Text"].ToString();
tn.NavigateUrl = "Display.aspx?id=" + row["id"].ToString() + "&&text=" + row["text"].ToString();
tn.Target = "Main";
tn.Value = row["id"].ToString();
tn.ImageUrl = "folder.gif";
string sid = row["id"].ToString();
this.TreeView1.Nodes.Add(tn);
this.travelTreeNode(tn, sid);
}
}
protected void travelTreeNode(TreeNode tn, string id) //子节点，数据库中读写内容
...{
DataSet ds = getDataSet(id);
DataTable dt = ds.Tables[0];
foreach (DataRow row in dt.Rows)
...{
TreeNode node = new TreeNode();
node.Text = row["Text"].ToString();
node.NavigateUrl = "Display.aspx?id=" + row["id"].ToString() + "&&text=" + row["text"].ToString();
node.Target = "Main";
node.Value = row["id"].ToString();
node.ImageUrl = "folder.gif";
string mid = row["id"].ToString();
tn.ChildNodes.Add(node);
travelTreeNode(node, mid);
}
}
}
<%...@ Page Language="C#" AutoEventWireup="true" CodeFile="Index.aspx.cs" Inherits="Index" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<frameset cols = "25%,75%" border = "1" framespacing = "0" frameborder = "1">
<frame name = "Tree" target = "Main" src = "Tree.aspx" frameborder = "1" noresize >
<frame name = "Main" src = "Display.aspx" frameborder = "1" noresize >
<noframes>
<body>
<p>次网页使用了框架，但你的浏览器不支持框架。</p>
</body>
</noframes>
</frameset>
</html>
protected void Page_Load(object sender, EventArgs e)
...{
if (Request.QueryString["text"] != null)
...{
Response.Write(Request.QueryString["text"] + "好地方");
}
else
...{
Response.Write("中国好地方");
}
}
就可以在左边导航中点击节点显示在mian里面
using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Data.SqlClient;public partial class _Default : System.Web.UI.Page ...{ protected void Page_Load(object sender, EventArgs e) ...{ if (!Page.IsPostBack) ...{ this.buildTreeNode(); } } protected DataSet getDataSet(string id) //链接数据库 ...{ string sql = "select * from treetest where parentid = " + Convert.ToInt32(id); SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=TeacherTest;Integrated Security=True"); SqlCommand cmd = new SqlCommand(sql, con); SqlDataAdapter adapter = new SqlDataAdapter(); DataSet ds = new DataSet(); adapter.SelectCommand = cmd; adapter.Fill(ds); return ds; } protected void buildTreeNode() //创建一个新的树节点将数据库中的text字段为0的内容写入 ...{ DataSet ds = getDataSet("0"); DataTable dt = ds.Tables[0]; foreach (DataRow row in dt.Rows) ...{ TreeNode tn = new TreeNode(); tn.Text = row["Text"].ToString(); tn.NavigateUrl = "Display.aspx?id=" + row["id"].ToString() + "&&text=" + row["text"].ToString(); tn.Target = "Main"; tn.Value = row["id"].ToString(); tn.ImageUrl = "folder.gif"; string sid = row["id"].ToString(); this.TreeView1.Nodes.Add(tn); this.travelTreeNode(tn, sid); } } protected void travelTreeNode(TreeNode tn, string id) //子节点，数据库中读写内容 ...{ DataSet ds = getDataSet(id); DataTable dt = ds.Tables[0]; foreach (DataRow row in dt.Rows) ...{ TreeNode node = new TreeNode(); node.Text = row["Text"].ToString(); node.NavigateUrl = "Display.aspx?id=" + row["id"].ToString() + "&&text=" + row["text"].ToString(); node.Target = "Main"; node.Value = row["id"].ToString(); node.ImageUrl = "folder.gif"; string mid = row["id"].ToString(); tn.ChildNodes.Add(node); travelTreeNode(node, mid); } }}在index源中复制为以下html代码：
<%...@ Page Language="C#" AutoEventWireup="true" CodeFile="Index.aspx.cs" Inherits="Index" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title> </head><frameset cols = "25%,75%" border = "1" framespacing = "0" frameborder = "1"> <frame name = "Tree" target = "Main" src = "Tree.aspx" frameborder = "1" noresize > <frame name = "Main" src = "Display.aspx" frameborder = "1" noresize > <noframes> <body> <p>次网页使用了框架，但你的浏览器不支持框架。</p> </body> </noframes></frameset></html>然后在mian中加载的代码写入：
protected void Page_Load(object sender, EventArgs e) ...{ if (Request.QueryString["text"] != null) ...{ Response.Write(Request.QueryString["text"] + "好地方"); } else ...{ Response.Write("中国好地方"); } }
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