StuMgmSys/StuMgmClient/StudentTree.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;

namespace StuMgmClient
{
    public partial class StudentTree : UserControl
    {
        public StudentTree()
        {
            InitializeComponent();
        }
        //个人信息
        private DataSet ds = null;
        public DataSet Ds
        {
            get { return ds; }
            set { ds = value; }
        }
        //节点table
        DataTable table = null;
        //dataRows转化成的table
        DataTable tableClone = null;
        Data da = new Data();
        private void StudentTree_Load(object sender, EventArgs e)
        {
            dgvStudent.Visible = false;
            BindRoot();
            //da.GetNodesDic(table);
        }

        //添加父节点的方法
        private void BindRoot()
        {
            //ClientMysql cm = new ClientMysql();
            // DataSet ds = cm.SelectNode();
            table = Ds.Tables["course_info"];
            //把父节点的数据帅选出来
            DataRow[] rows = table.Select("pid=0");//取根  
            foreach (DataRow dRow in rows)
            {
                TreeNode rootNode = new TreeNode();
                rootNode.Tag = dRow;
                rootNode.Text = dRow["name"].ToString();
                //把此节点放入树中
                StudenTree.Nodes.Add(rootNode);
                //绑定子节点
                BindChildAreas(rootNode);//调用添加子节点的方法
            }
        }
        //添加子节点的方法、递归绑定子区域  
        private void BindChildAreas(TreeNode fNode)
        {
            DataRow dr = (DataRow)fNode.Tag;//父节点数据关联的数据行
            int fAreaId = Convert.ToInt32(dr["id"]); //父节点ID
            DataRow[] rows1 = table.Select("pid =" + fAreaId);//子区域            
            if (rows1.Length == 0)  //递归终止，区域不包含子区域时            
            {
                return;
            }
            foreach (DataRow dRow in rows1)
            {
                TreeNode node = new TreeNode();
                node.Tag = dRow;
                node.Text = dRow["name"].ToString();
                //添加子节点               
                fNode.Nodes.Add(node);
            }
        }
        //子节点单击显示内容
        private void StudentTree_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
        {
            if (e.Button == System.Windows.Forms.MouseButtons.Left)  //单击鼠标左键才响应
            {
                if (e.Node.Level == 1)                               //判断子节点才响应
                {
                    dgvStudent.Visible = true;
                    DataRow dr = (DataRow)e.Node.Tag;
                    int fAreaId = Convert.ToInt32(dr["id"]); //子节点ID
                    DataRow[] drows = table.Select("pid =" + fAreaId);//取根 
                    tableClone = table.Clone();//克隆表结构
                    foreach (DataRow drr in drows)
                    {
                        tableClone.ImportRow(drr);
                    }
                    dgvStudent.AutoGenerateColumns = false;
                    dgvStudent.AllowUserToAddRows = false;
                    dgvStudent.DataSource = tableClone;
                }
            }
        }

        //我的任务_查看按钮方法
        private void DgvStudent_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.ColumnIndex == 1 && e.RowIndex != -1)
            {
                //Dictionary<int, int> stateDic = da.StateParsing(table);
                Dictionary<int, int> stateDic = da.GetNodesDic(table);
                // string s=da.DicParsing(stateDic);
                DataRow drViews = tableClone.Rows[e.RowIndex];
                int state = stateDic[Convert.ToInt32((drViews["id"]))];
                SelectFrom sf = new SelectFrom(drViews, state);
                //string test = da.DicParsing(stateDic);
                sf.ShowDialog();
                // ShowData();
            }
        }

    }
}