asp.net TreeView

希望有实力的朋友了以后能指点我改一下选中和不选中的递归

 

前台代码

  <div style="font-size:14px;">

                        <asp:TreeView ShowCheckBoxes="All" ID="usertree" runat="server" OnTreeNodeCheckChanged="MyTreeView_TreeNodeCheckChanged" OnSelectedNodeChanged="MyTreeView_SelectedNodeChanged" >

                        </asp:TreeView>

                    </div>

    

    

    

               <div style="float:left;">

           <span style="display:block">要参加人员：</span>

            <asp:ListBox ID="NeedExamStaff" AutoPostBack="true" runat="server" Height="262px" Width="116px" SelectionMode="Multiple">

            <asp:ListItem Value="张三"></asp:ListItem>

            <asp:ListItem Value="李四"></asp:ListItem>

            <asp:ListItem>王五</asp:ListItem>

            </asp:ListBox>

                <hr />

             <span style="margin-bottom:0px">总 人 员：<asp:TextBox ID="NeedStaffNumber" runat="server" Text="" Enabled="false" Height="16px" Width="56px"></asp:TextBox><br /><span style="color:red;font-size:small" id="VNeedStaffNumber" runat="server"></span></span>



             </div>  

             <asp:Button ID="Button1" runat="server" Text="确定" OnClick="Button1_Click" Height="21px" />

View Code

 

后台代码

       DataTable dt = new DataTable();

        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {



                SqlConnection conn = new SqlConnection();

                conn.ConnectionString = "User ID=sa;Initial Catalog=newtest;Data Source=JJ-PC;Password=123";



                // 打开连接

                if (conn.State == ConnectionState.Closed)

                {

                    conn.Open();

                }



                var sql = "select * from city";



                // 初始化命令

                SqlCommand cmd = new SqlCommand();

                cmd.Connection = conn;

                cmd.CommandType = CommandType.Text;

                cmd.CommandText = sql;



                // 用于执行数据插入、更新和删除的操作；返回被影响的行数。

                int i = cmd.ExecuteNonQuery();







                // 如果想获取数据集合的话我们经常使用到的是数据适配器



                SqlDataAdapter adapter = new SqlDataAdapter();

                adapter.SelectCommand = cmd;

                adapter.Fill(dt);

                this.usertree.Nodes.Clear();

                usertree.Attributes.Add("onclick", " postBackByObject()");



                AddTree(110000, (TreeNode)null);

            }

        }







        //递归添加树的节点

        public void AddTree(int ParentID, TreeNode pNode)

        {

            DataTable ds = dt;

            DataView dvTree = new DataView(ds);

            //过滤ParentID,得到当前的所有子节点

            dvTree.RowFilter = "[fatherID] = " + ParentID;



            foreach (DataRowView Row in dvTree)

            {

                TreeNode Node = new TreeNode();

                if (pNode == null)

                {

                    //添加根节点

                    Node.Text = Row[2].ToString();

                    Node.Value = Row[1].ToString();

                    this.usertree.Nodes.Add(Node);

                    Node.Expanded = true;

                    Node.ShowCheckBox = true;

                    //再次递归

                    AddTree(Int32.Parse(Row[1].ToString()), Node);

                }

                else

                {

                    //添加当前节点的子节点

                    Node.Text = Row[2].ToString();

                    Node.Value = Row[1].ToString();

                    pNode.ChildNodes.Add(Node);

                    Node.Expanded = true;

                    Node.ShowCheckBox = true;

                    //再次递归

                    AddTree(Int32.Parse(Row[1].ToString()), Node);

                }

            }

        }



        protected void MyTreeView_TreeNodeCheckChanged(object sender, TreeNodeEventArgs e)

        {

            TreeNode node = e.Node;

            var nodeCount = node.ChildNodes.Count;

            if (node.Checked == true)

            {

                if (nodeCount > 0)

                {

                    for (var i = 0; i < nodeCount; i++)

                    {

                        node.ChildNodes[i].Checked = true;

                        var node1Count = node.ChildNodes[i].ChildNodes.Count;

                        if (node1Count > 0)

                        {

                            for (var k = 0; k < node1Count; k++)

                            {

                                node.ChildNodes[i].ChildNodes[k].Checked = true;

                                var node2Count = node.ChildNodes[i].ChildNodes[k].ChildNodes.Count;

                                if (node2Count > 0)

                                {

                                    for (var j = 0; j < node2Count; j++)

                                    {

                                        node.ChildNodes[i].ChildNodes[k].ChildNodes[j].Checked = true;

                                    }

                                }

                            }

                        }

                    }

                }

            }

            else

            {

                if (nodeCount > 0)

                {

                    for (var i = 0; i < nodeCount; i++)

                    {

                        node.ChildNodes[i].Checked = false;

                        var node1Count = node.ChildNodes[i].ChildNodes.Count;

                        if (node1Count > 0)

                        {

                            for (var k = 0; k < node1Count; k++)

                            {

                                node.ChildNodes[i].ChildNodes[k].Checked = false;

                                var node2Count = node.ChildNodes[i].ChildNodes[k].ChildNodes.Count;

                                if (node2Count > 0)

                                {

                                    for (var j = 0; j < node2Count; j++)

                                    {

                                        node.ChildNodes[i].ChildNodes[k].ChildNodes[j].Checked = false;

                                    }

                                }

                            }

                        }

                    }

                }

            }

        }



        protected void MyTreeView_SelectedNodeChanged(object sender, EventArgs e)

        {

            var tt = usertree.SelectedNode.Checked;

            var dd = usertree.SelectedValue;

            databind();

        }



        public void databind()

        {



            if (usertree.SelectedNode.Checked == false)

            {

                if (usertree.SelectedNode.ChildNodes.Count > 0)

                {

                    foreach (TreeNode subNode in usertree.SelectedNode.ChildNodes)

                    {

                        usertree.SelectedNode.Checked = true;

                        subNode.Checked = true;

                        if (subNode.ChildNodes.Count > 0)

                        {

                            foreach (TreeNode subNode2 in subNode.ChildNodes)

                            {

                                subNode2.Checked = true;



                                if (subNode2.ChildNodes.Count > 0)

                                {

                                    foreach (TreeNode subNode3 in subNode2.ChildNodes)

                                    {

                                        subNode3.Checked = true;

                                    }

                                }

                            }

                        }

                    }

                }

                else

                {

                    usertree.SelectedNode.Checked = true;

                }

            }

            else

            {

                if (usertree.SelectedNode.ChildNodes.Count > 0)

                {

                    foreach (TreeNode subNode in usertree.SelectedNode.ChildNodes)

                    {

                        usertree.SelectedNode.Checked = false;

                        subNode.Checked = false;

                        if (subNode.ChildNodes.Count > 0)

                        {

                            foreach (TreeNode subNode2 in subNode.ChildNodes)

                            {

                                subNode2.Checked = false;



                                if (subNode2.ChildNodes.Count > 0)

                                {

                                    foreach (TreeNode subNode3 in subNode2.ChildNodes)

                                    {

                                        subNode3.Checked = false;

                                    }

                                }

                            }

                        }

                    }

                }

                else

                {

                    usertree.SelectedNode.Checked = false;

                }

            }

            usertree.SelectedNode.Selected = false;

        }









        protected void Button1_Click(object sender, EventArgs e)

        {

            foreach (TreeNode tn in usertree.CheckedNodes)

            {

                try

                {



                    string userid = tn.Value.ToString();

                  

                        ListItem li = new ListItem();

                       li.Text = tn.Value;

                       li.Value = tn.Text;



                        var tt = 0;

                        for (var i = 0; i < NeedExamStaff.Items.Count; i++)

                        {



                            if (NeedExamStaff.Items[i].Value == li.Value)

                            {

                                tt = 1;

                            }

                        }



                        if (tt == 0)

                        {

                            this.NeedExamStaff.Items.Add(li);



                            if (this.NeedStaffNumber.Text != "")

                            {

                                this.NeedStaffNumber.Text = (Convert.ToInt32(this.NeedStaffNumber.Text) + 1).ToString();

                                this.VNeedStaffNumber.InnerText = "";

                            }

                            else

                            {

                                this.NeedStaffNumber.Text = "1";

                                this.VNeedStaffNumber.InnerText = "";

                            }



                        }



                    }

                

                catch

                {



                }

            }

        }

View Code