树形结构的问题

Question

用c#实现 动态加载树型结构，添加，修改，删除节点

Answer 1

http://topic.csdn.net/u/20100727/20/6998f485-d40b-4ee3-99ea-e55a943ac43f.html

Answer 2

 private void treeView1_Data()
        {
            string str = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + System.Windows.Forms.Application.StartupPath + "/DB/Ventilator.mdb";
            OleDbConnection cn = new OleDbConnection(str);
            cn.Open();
            OleDbCommand cmd = cn.CreateCommand();
            cmd.CommandText = "Select  distinct  Check_day from TestTotalinfo ";
            OleDbDataReader rd = cmd.ExecuteReader();
            TreeNode node3 = new TreeNode();
            node3.Text = "根据日期排序";
            treeView1.Nodes.Add(node3);
            while (rd.Read())
            {
                TreeNode node = new TreeNode();
                node.Text = rd["Check_day"].ToString();
                node3.Nodes.Add(node);
                node.ImageIndex = 0;
                node.SelectedImageIndex = 0;
                OleDbCommand cmd2 = cn.CreateCommand();
                cmd2.CommandText = "Select distinct TestName from TestTotalinfo where  Check_day='" + node.Text + "'";
                OleDbDataReader rd2 = cmd2.ExecuteReader();
                {
                    while (rd2.Read())
                    {
                        TreeNode node2 = new TreeNode();
                        node2.Text = rd2["TestName"].ToString();
                        node.Nodes.Add(node2);
                        node2.ImageIndex = 2;
                        node2.SelectedImageIndex = 2;
                        int a = int.Parse(ud.getTestTotalinfo(node2.Text).Rows[0].ItemArray[12].ToString().Trim());
                        switch (a)
                        {
                            case 0:
                                node2.Nodes.Add("", "试验的总体情况与测试方法", 4, 4);
                                node2.Nodes.Add("", "条件选择", 4, 4);
                                node2.Nodes.Add("", "数据采集", 4, 4);
                                node2.Nodes.Add("", "性能测试报告", 4, 4);
                                break;
                            case 1:
                                node2.Nodes.Add("", "试验的总体情况与测试方法", 3, 3);
                                node2.Nodes.Add("", "条件选择", 4, 4);
                                node2.Nodes.Add("", "数据采集", 4, 4);
                                node2.Nodes.Add("", "性能测试报告", 4, 4);
                                break;
                            case 2:
                                node2.Nodes.Add("", "试验的总体情况与测试方法", 3, 3);
                                node2.Nodes.Add("", "条件选择", 3, 3);
                                node2.Nodes.Add("", "数据采集", 4, 4);
                                node2.Nodes.Add("", "性能测试报告", 4, 4);
                                break;
                            case 3:
                                node2.Nodes.Add("", "试验的总体情况与测试方法", 3, 3);
                                node2.Nodes.Add("", "条件选择", 3, 3);
                                node2.Nodes.Add("", "数据采集", 3, 3);
                                node2.Nodes.Add("", "性能测试报告", 4, 4);
                                break;
                            case 4:
                                node2.Nodes.Add("", "试验的总体情况与测试方法", 3, 3);
                                node2.Nodes.Add("", "条件选择", 3, 3);
                                node2.Nodes.Add("", "数据采集", 3, 3);
                                node2.Nodes.Add("", "性能测试报告", 3, 3);
                                break;
                        }                    }
                }
            }
            treeView1.Nodes[0].Expand();//展开根节点        }

Answer 3

  private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
        {
            if (e.Node.Parent == null)
            {
                menuStrip.Items.Clear();
                menuStrip.Items.Add(new ToolStripMenuItem("添加日期", Image.FromFile(System.Windows.Forms.Application.StartupPath + "/img/80[2].png"), new EventHandler(add_date)));
            }
            else if (e.Node.Parent.Text == "根据日期排序")
            {
                menuStrip.Items.Clear();
                menuStrip.Items.Add(new ToolStripMenuItem("删除", Image.FromFile(System.Windows.Forms.Application.StartupPath + "/img/35[2].png"), new EventHandler(delete1_All)));
                menuStrip.Items.Add(new ToolStripMenuItem("添加记录", Image.FromFile(System.Windows.Forms.Application.StartupPath + "/img/80[2].png"), new EventHandler(add1_Clicked)));
            }
            else if (e.Node.Parent.Text != "根据日期排序" && e.Node.Nodes.Count != 0)
            {
                menuStrip.Items.Clear();
                menuStrip.Items.Add(new ToolStripMenuItem("删除任务", Image.FromFile(System.Windows.Forms.Application.StartupPath + "/img/35[2].png"), new EventHandler(delete1_Clicked)));            }
            else if (treeView1.SelectedNode.Nodes.Count == 0 && e.Node.Parent.Text != "根据日期排序")
            {
                menuStrip.Items.Clear();
                menuStrip.Items.Add(new ToolStripMenuItem("打开", Image.FromFile(System.Windows.Forms.Application.StartupPath + "/img/80[1].png"), new EventHandler(treeView1_DoubleClick)));
            }        }

Answer 4

 private void delete1_Clicked(object sender, EventArgs e)
        {
            DialogResult result;
            result = MessageBox.Show("您确定要删除该记录吗", "友情提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);
            if (result == DialogResult.OK)
            {                ud.DeleteData1(treeView1.SelectedNode.Text);
                treeView1.Nodes.Remove(treeView1.SelectedNode);            }
        }