TREEVIEW绑定以后不能显示
日期：2014-05-20 浏览次数：20825 次
TREEVIEW绑定之后不能显示
以下是代码，为什么可以运行，但是在网页之中显示不出来
一个显示页面Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!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 id="Head1" runat="server">
<title>无标题页 </title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TreeView ID="tvMenu" runat="server" ImageSet="Faq" ShowLines="True" ExpandDepth="0" Target="middle" >
<ParentNodeStyle Font-Bold="False" />
<HoverNodeStyle Font-Underline="True" ForeColor="Purple" />
<SelectedNodeStyle Font-Underline="True" HorizontalPadding="0px" VerticalPadding="0px" />
<NodeStyle Font-Names="Tahoma" Font-Size="8pt" ForeColor="DarkBlue" HorizontalPadding="5px"
NodeSpacing="0px" VerticalPadding="0px" />
</asp:TreeView>
</div>
</form>
</body>
</html>
一个代码隐藏页Default.aspx.cs
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
{
SqlConnection Conn = new SqlConnection("server=20090207-0309;database=checkthree;uid=sa;pwd=1111");
DataSet ds;
protected void Page_Load(object sender, EventArgs e)
{
Conn.Open();
this.createDataSet();
Conn.Close();
this.InitTree(tvMenu.Nodes, "0");
}
private DataSet createDataSet()
{
ds = new DataSet();
string sqlStr = "select * from Tree ";
SqlDataAdapter cmdSelect = new SqlDataAdapter(sqlStr, Conn);
cmdSelect.Fill(ds, "Tree");
return ds;
}
protected void InitTree(TreeNodeCollection Nds, string parentId)//用递归方法动态生成节点
{
DataView dv = new DataView();
TreeNode tmpNode;
dv.Table = ds.Tables["Tree"];
dv.RowFilter = "pat_id=" + "'" + parentId + "'";
foreach (DataRowView drv in dv)
{
tmpNode = new TreeNode();
tmpNode.Value = drv["node_id"].ToString();
tmpNode.Text = drv["naode_name"].ToString();
tmpNode.NavigateUrl = drv["url"].ToString();
Nds.Add(tmpNode);
以下是代码，为什么可以运行，但是在网页之中显示不出来
一个显示页面Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!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 id="Head1" runat="server">
<title>无标题页 </title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TreeView ID="tvMenu" runat="server" ImageSet="Faq" ShowLines="True" ExpandDepth="0" Target="middle" >
<ParentNodeStyle Font-Bold="False" />
<HoverNodeStyle Font-Underline="True" ForeColor="Purple" />
<SelectedNodeStyle Font-Underline="True" HorizontalPadding="0px" VerticalPadding="0px" />
<NodeStyle Font-Names="Tahoma" Font-Size="8pt" ForeColor="DarkBlue" HorizontalPadding="5px"
NodeSpacing="0px" VerticalPadding="0px" />
</asp:TreeView>
</div>
</form>
</body>
</html>
一个代码隐藏页Default.aspx.cs
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
{
SqlConnection Conn = new SqlConnection("server=20090207-0309;database=checkthree;uid=sa;pwd=1111");
DataSet ds;
protected void Page_Load(object sender, EventArgs e)
{
Conn.Open();
this.createDataSet();
Conn.Close();
this.InitTree(tvMenu.Nodes, "0");
}
private DataSet createDataSet()
{
ds = new DataSet();
string sqlStr = "select * from Tree ";
SqlDataAdapter cmdSelect = new SqlDataAdapter(sqlStr, Conn);
cmdSelect.Fill(ds, "Tree");
return ds;
}
protected void InitTree(TreeNodeCollection Nds, string parentId)//用递归方法动态生成节点
{
DataView dv = new DataView();
TreeNode tmpNode;
dv.Table = ds.Tables["Tree"];
dv.RowFilter = "pat_id=" + "'" + parentId + "'";
foreach (DataRowView drv in dv)
{
tmpNode = new TreeNode();
tmpNode.Value = drv["node_id"].ToString();
tmpNode.Text = drv["naode_name"].ToString();
tmpNode.NavigateUrl = drv["url"].ToString();
Nds.Add(tmpNode);
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