ASP.NET TreeViewデータベースインスタンスの読み込み
4348 ワード
フロント:
<br/><br/><br/> <form id="form1" runat="server"><br/> <div><br/> <treeview id="TreeView1" runat="server" showlines="True"><br/> </treeview><br/> </div><br/> </form><br/><br/><br/>
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<pre><code>
<br/>using System;
<br/>using System.Collections.Generic;
<br/>using System.Linq;
<br/>using System.Web;
<br/>using System.Web.UI;
<br/>using System.Web.UI.WebControls;
<br/>using System.Data;
<br/>using System.Data.SqlClient;
<br/>using System.Configuration;
<p>namespace TreeView<br/>{<br/> public partial class _Default : System.Web.UI.Page<br/> {<br/> public static string st = ConfigurationManager.ConnectionStrings["sql"].ToString();<br/> private DataTable dts=new DataTable();<br/> protected void Page_Load(object sender, EventArgs e)<br/> {<br/> if (!IsPostBack)<br/> {<br/> dts = CreateTable();<br/> CreateNode();<br/> }<br/> }<br/> public void CreateNode()<br/> {<br/> DataRow[] dr = dts.Select("ParentID=0");<br/> if(dr.Length>0)<br/> {<br/> foreach(DataRow drr in dr)<br/> {<br/> TreeNode tn = new TreeNode();<br/> tn.Value = drr["MenuID"].ToString();<br/> tn.Text = drr["MenuName"].ToString();<br/> tn.Expanded = false;<br/> tn.SelectAction = TreeNodeSelectAction.Expand;<br/> TreeView1.Nodes.Add(tn);<br/> CreateChild(tn,dts);<br/> }<br/> }<br/> else<br/> {<br/> TreeNode t=new TreeNode();<br/> t.Value=" ";<br/> t.Text=" ";<br/> t.Expanded=false;<br/> t.SelectAction=TreeNodeSelectAction.Expand;<br/> TreeView1.Nodes.Add(t);<br/> }<br/> }<br/> public void CreateChild(TreeNode tnn, DataTable dtt)<br/> {<br/> DataRow[] dr = dtt.Select("ParentID=" + tnn.Value);<br/> if (dr.Length > 0)<br/> {<br/> foreach (DataRow drw in dr)<br/> {<br/> TreeNode ts = new TreeNode();<br/> ts.Value = drw["MenuID"].ToString();<br/> ts.Text = drw["MenuName"].ToString();<br/> ts.SelectAction = TreeNodeSelectAction.Expand;<br/> ts.Expanded = false;<br/> tnn.ChildNodes.Add(ts);<br/> CreateChild(ts, dtt);<br/> }<br/> }<br/> }<br/> public DataTable CreateTable()<br/> {<br/> DataTable d = new DataTable();<br/> using(SqlConnection sql=new SqlConnection(st))<br/> {<br/><br/> SqlCommand sq=new SqlCommand("select * from TreeViewName",sql);<br/> SqlDataAdapter sda=new SqlDataAdapter();<br/> sda.SelectCommand = sq;<br/> sda.Fill(d);<br/><br/> }<br/> return d;<br/> }<br/> }<br/>}<br/></p>
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