asp.net treeview 总结

网上关于Treeview的代码虽然多但是都是很乱实用性和正确性也不是很好只好自己写一套了,时间比较紧张性能可能还需调整

以用户组织的一个实际例子来讲诉Treeview的用法吧

组织表结构:

用户组织表结构:

前台界面aspx

<form id="Form1" runat="server">

        <table>

            <tr>

                <td class="contentTD">

                    <div id="MyTreeDiv">

                        <asp:TreeView ShowCheckBoxes="All" ID="MyTreeView" ImageSet="Contacts" runat="server" ExpandDepth="" Width="400px" BorderStyle="Solid" BorderWidth="1px">

                        </asp:TreeView>

                    </div>

                </td>

            </tr>

            <tr>

                <td class="content">

                    <asp:Button ID="btnSubmit" runat="server" Text="提 交" CssClass="dotNetButton" OnClick="btnSubmit_Click" /><input type="button" class="glbutton" onclick="history.go(-1);"

                        value="返 回" />

                    <asp:ListBox ID="ListBox1" Visible="false" runat="server"></asp:ListBox>

                </td>

            </tr>

        </table>

    </form>

js控制父节点选中子节点自动选中

<script>

        function Davidovitz_HandleCheckbox() {

            var element = event.srcElement;

            if (element.tagName == "INPUT" && element.type == "checkbox") {

                var checkedState = element.checked;

                while (element.tagName != "TABLE") // Get wrapping table

                {

                    element = element.parentElement;

                }

                Davidovitz_UnCheckParents(element); // Uncheck all parents

                element = element.nextSibling;

                if (element == null) // If no childrens than exit

                    return;

                var childTables = element.getElementsByTagName("TABLE");

                for (var tableIndex = ; tableIndex < childTables.length; tableIndex++) {

                    Davidovitz_CheckTable(childTables[tableIndex], checkedState);

                }

            }

        }

        // Uncheck the parents of the given table, Can remove the recurse (redundant)

        function Davidovitz_UnCheckParents(table) {

            if (table == null || table.rows[].cells.length == ) // This is the root

            {

                return;

            }

            var parentTable = table.parentElement.previousSibling;

            Davidovitz_CheckTable(parentTable, false);

            Davidovitz_UnCheckParents(parentTable);

        }

        // Handle the set of checkbox checked state

        function Davidovitz_CheckTable(table, checked) {

            var checkboxIndex = table.rows[].cells.length - ;

            var cell = table.rows[].cells[checkboxIndex];

            var checkboxes = cell.getElementsByTagName("INPUT");

            if (checkboxes.length == ) {

                checkboxes[].checked = checked;

            }

        }

    </script>

后台代码.cs

protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                this.MyTreeView.Attributes.Add("onclick", "Davidovitz_HandleCheckbox()");

                bind();

            }

        }

        //数据绑定

        private void bind()

        {

            this.MyTreeView.Nodes.Clear();

            //读取组织列表

            DataTable dt = new T_GroupManager().GetDataTableBySQL(" and FState=1 and FCreatorID = " + Request.QueryString["id"]);

            this.ViewState["ds"] = dt;

            //调用递归函数，完成树形结构的生成

            AddTree(, (TreeNode)null);

            if (Request.QueryString["id"] != null)

            {

                //根据用户ID查找对应的用户组织结构,勾上

                List<T_UserGroup> list = new T_UserGroupManager().GetAllBySQL(" and FUSerID=" + Request.QueryString["id"]).ToList();

                ViewState["UserGroup"] = list;

                foreach (T_UserGroup item in list)

                {

                    for (int i = ; i < this.MyTreeView.Nodes.Count; i++)

                    {

                        if (MyTreeView.Nodes[i].ChildNodes.Count > )  //判断是否还有子节点

                        {

                            SetNode(MyTreeView.Nodes[i]);

                        }

                        if (MyTreeView.Nodes[i].Value == item.FGroupID.ToString())       //判断是否被选中

                        {

                            MyTreeView.Nodes[i].Checked = true;

                        }

                    }

                }

            }

        }

        //查找子节点

        public void SetNode(TreeNode node)

        {

            if (Request.QueryString["id"] != null)

            {

                //根据ID查找对应的组织结构,勾上

                List<T_UserGroup> list = ViewState["UserGroup"] as List<T_UserGroup>;

                foreach (T_UserGroup item in list)

                {

                    for (int i = ; i < node.ChildNodes.Count; i++)

                    {

                        if (node.ChildNodes[i].ChildNodes.Count > )  //判断是否还有子节点

                        {

                            SetNode(node.ChildNodes[i]);  //递归查找

                        }

                        if (node.ChildNodes[i].Value == item.FGroupID.ToString())       //判断是否被选中

                        {

                            node.ChildNodes[i].Checked = true;

                        }

                    }

                }

            }

        }

        //递归添加树的节点

        public void AddTree(int ParentID, TreeNode pNode)

        {

            DataTable ds = (DataTable)this.ViewState["ds"];

            DataView dvTree = new DataView(ds);

            //过滤ParentID,得到当前的所有子节点

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

            foreach (DataRowView Row in dvTree)

            {

                TreeNode Node = new TreeNode();

                if (pNode == null)

                {

                    //添加根节点

                    Node.Text = Row["FGroupName"].ToString();

                    Node.Value = Row["PID"].ToString();

                    this.MyTreeView.Nodes.Add(Node);

                    Node.Expanded = true;

                    //再次递归

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

                }

                else

                {

                    //添加当前节点的子节点

                    Node.Text = Row["FGroupName"].ToString();

                    Node.Value = Row["PID"].ToString();

                    pNode.ChildNodes.Add(Node);

                    Node.Expanded = true;

                    //再次递归

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

                }

            }

        }

        /// <summary>

        /// 保存

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        protected void btnSubmit_Click(object sender, EventArgs e)

        {

            for (int i = ; i < MyTreeView.Nodes.Count; i++)

            {

                if (MyTreeView.Nodes[i].ChildNodes.Count > )  //判断是否还有子节点

                {

                    GetNode(MyTreeView.Nodes[i]);

                }

                if (MyTreeView.Nodes[i].Checked == true)       //判断是否被选中

                {

                    string s = MyTreeView.Nodes[i].Value.ToString();

                    ListBox1.Items.Add(s);

                }

            }

            T_UserGroupManager gm = new T_UserGroupManager();

            //清空

            List<T_UserGroup> list = ViewState["UserGroup"] as List<T_UserGroup>;

            foreach (T_UserGroup item in list)

            {

                gm.DeleteByPID(item.PID);

            }

            int id = Convert.ToInt32(Request.QueryString["id"]);

            //保存

            foreach (var item in ListBox1.Items)

            {

                T_UserGroup ug = new T_UserGroup();

                ug.FUSerID = id;

                ug.FGroupID = Convert.ToInt32((item as ListItem).Value);

                ug.FState = ;

                gm.Add(ug);

            }

            ShowJS("<script>alert('保存成功！');location = 'UserGroupInfo.aspx'</script>");

        }

        //获取选中节点

        public void GetNode(TreeNode node)

        {

            for (int i = ; i < node.ChildNodes.Count; i++)

            {

                if (node.ChildNodes[i].ChildNodes.Count > )  //判断是否还有子节点

                {

                    GetNode(node.ChildNodes[i]);               //递归查找

                }

                if (node.ChildNodes[i].Checked == true)     //判断是否被选中

                {

                    string s = node.ChildNodes[i].Value.ToString();

                    ListBox1.Items.Add(s);

                }

            }

        }

    }

基本上面就是全部代码了,实现了Treeview的读取和根据勾选保存,根据用户配置设置Treeview的勾选项

用了好一段时间才整理出来的,要转载的童鞋记得保留我的链接哦http://www.cnblogs.com/linyijia/p/3497503.html

巴特西

asp.net treeview 总结

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