createtree.aspx.cs

计算机学院网站及管理系统

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 Microsoft.Web.UI.WebControls;
using System.Data.SqlClient;

namespace ComputerWeb
{
	/// <summary>
	/// Summary description for CreateTree.
	/// </summary>
	public class CreateTree : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button AddBtn;
		protected System.Web.UI.WebControls.Button UpdateBtn;
		protected System.Web.UI.WebControls.Button DeleteBtn;
		protected System.Web.UI.WebControls.TextBox Description;
		protected System.Web.UI.WebControls.Button UpBtn;
		protected System.Web.UI.WebControls.Button DownBtn;
		protected Microsoft.Web.UI.WebControls.TreeView treeView;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			if(!Page.IsPostBack)
			{
				BindTreeData(0);
			}
		}

		private void BindTreeData(int nCurrentNodeID)
		{
			BindTree tree = new BindTree();
			tree.BindTreeView(treeView,nCurrentNodeID);
		}

		private int GetCurrentNodeID()
		{
			return(Int32.Parse(treeView.GetNodeFromIndex(treeView.SelectedNodeIndex).NodeData));
		}

		private String GetSelectNode()
		{
			return(treeView.SelectedNodeIndex);
		}

		private void SetSelectNode(String index)
		{
			treeView.SelectedNodeIndex = index;
			treeView.GetNodeFromIndex(index).Expanded = true;
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.AddBtn.Click += new System.EventHandler(this.AddBtn_Click);
			this.UpdateBtn.Click += new System.EventHandler(this.UpdateBtn_Click);
			this.DeleteBtn.Click += new System.EventHandler(this.DeleteBtn_Click);
			this.UpBtn.Click += new System.EventHandler(this.UpBtn_Click);
			this.DownBtn.Click += new System.EventHandler(this.DownBtn_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void AddBtn_Click(object sender, System.EventArgs e)
		{
			ClassTreeDB tree = new ClassTreeDB();
			SqlDataReader rect = tree.GetSubClassCount(GetCurrentNodeID());

			int nCount = 0;
			while(rect.Read())
			{
				nCount = Int32.Parse(rect["SubCount"].ToString());
			}
			rect.Close();

			String index = GetSelectNode();
			tree.AddClass(Description.Text.Trim(),GetCurrentNodeID(),nCount);

			BindTreeData(GetCurrentNodeID());
			SetSelectNode(index);
		}

		private void UpdateBtn_Click(object sender, System.EventArgs e)
		{
			ClassTreeDB tree = new ClassTreeDB();

			String index = GetSelectNode();
			tree.UpdateClassDesc(GetCurrentNodeID(),Description.Text.Trim());
			
			BindTreeData(GetCurrentNodeID());
			SetSelectNode(index);
		}

		private void DeleteBtn_Click(object sender, System.EventArgs e)
		{
			ClassTreeDB tree = new ClassTreeDB();
			tree.DeleteClass(GetCurrentNodeID());

			BindTreeData(GetCurrentNodeID());
		}

		private void UpBtn_Click(object sender, System.EventArgs e)
		{
			ClassTreeDB tree = new ClassTreeDB();
			tree.UpdateClassOrder(GetCurrentNodeID(),"up");

			BindTreeData(GetCurrentNodeID());
		}

		private void DownBtn_Click(object sender, System.EventArgs e)
		{
			ClassTreeDB tree = new ClassTreeDB();
			tree.UpdateClassOrder(GetCurrentNodeID(),"down");			

			BindTreeData(GetCurrentNodeID());		
		}
	}
}