TreeView绑定XML文档

   

 绑定TreeView控件#region  绑定TreeView控件
    /**//// <summary>
    /// 绑定TreeView控件
    /// </summary>
    /// <param name="treeview">TreeView控件</param>
    /// <param name="xpath">查询条件</param>
    protected void BindTreeView(TreeView treeview, string xpath)
    ...{
        //声明XML数据源，供绑定TreeView控件时使用
        XmlDataSource datasource = new XmlDataSource();
        datasource.DataFile = Server.MapPath(".") + "/TreeMenu/TreeMenu.xml";
        if (xpath == "")
        ...{
            datasource.XPath = "/*/*";
        }
        else
        ...{
            datasource.XPath = xpath;
        }
        //添加TreeNodeBinding控件集合
        TreeNodeBinding binding1 = new TreeNodeBinding();
        binding1.DataMember = "TreeNodes";
        treeview.DataBindings.Add(binding1);

        TreeNodeBinding binding2 = new TreeNodeBinding();
        binding2.DataMember = "TreeNode";
        binding2.TextField = "Text";
        binding2.NavigateUrlField = "URL";
        treeview.DataBindings.Add(binding2);

        TreeNodeBinding binding3 = new TreeNodeBinding();
        binding3.DataMember = "Nodes";
        binding3.TextField = "Text";
        binding3.NavigateUrlField = "URL";
        treeview.DataBindings.Add(binding3);

        TreeNodeBinding binding4 = new TreeNodeBinding();
        binding4.DataMember = "Node";
        binding4.TextField = "Text";
        binding4.NavigateUrlField = "URL";
        treeview.DataBindings.Add(binding4);
        //为TreeView控件的根目录绑定值
        treeview.DataBindings[0].DataMember = "TreeNodes";
        treeview.DataBindings[0].Text = "秦山三期OA系统";
        //为父级目录绑定值
        treeview.DataBindings[1].DataMember = "TreeNode";
        treeview.DataBindings[1].TextField = "Text";
        treeview.DataBindings[1].NavigateUrl = "URL";
        //为1级节点绑定值
        treeview.DataBindings[2].DataMember = "Nodes";
        treeview.DataBindings[2].TextField = "Text";
        treeview.DataBindings[2].NavigateUrlField = "URL";
        //为2级节点绑定值
        treeview.DataBindings[3].DataMember = "Node";
        treeview.DataBindings[3].TextField = "Text";
        treeview.DataBindings[3].NavigateUrlField = "URL";
        //绑定TreeView控件
        treeview.DataSource = datasource;
        treeview.DataBind();
    }
    #endregion

上面蓝色字体是关键,主要用到了树属性中的XPath对显示条件进行筛选.从XML文档的第二级节点开始显示.

绑定TreeView过程中还可以用循环方式添加节点到树中.方法如下:

  

  private void ShowElement()
    ...{
        string xmlpath = Server.MapPath(".") + "/TreeMenu/TreeMenu.xml";
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.Load(xmlpath);
        XmlNodeList nodeList = xmlDoc.SelectSingleNode("TreeNodes").ChildNodes;//获取TreeNodes节点的所有子节点
        //定义三个节点
        TreeNode treenode;
        TreeNode nodes;
        TreeNode node;
        //循环获取节点中属性ID的值
        foreach (XmlNode xn in nodeList)//遍历所有子节点
        ...{
            XmlElement xe = (XmlElement)xn;//将子节点类型转换为XmlElement类型
            for (int m = 0; m < 3; m++)
            ...{

                if (xe.GetAttribute("ID") == m.ToString())//如果ID属性值为m的值
                ...{
                    treenode = new TreeNode(xe.GetAttribute("Text").ToString(),"","",xe.GetAttribute("URL").ToString(),"");

                    this.TreeView1.Nodes.Add(treenode); //为树添加１级节点

                    //Response.Write(xe.GetAttribute("Text").ToString() + "</br>");

                    //如果下面有子节点在下走
                    XmlNodeList nls = xe.ChildNodes;//继续获取xe子节点的所有子节点
                    foreach (XmlNode xn1 in nls)//遍历
                    ...{
                        XmlElement xe2 = (XmlElement)xn1;//转换类型
                        if (xe2.Name == "Nodes")//如果找到
                        ...{
                            for (int i = 0; i < nls.Count; i++)
                            ...{
                                //为２级节点添加子元素
                                nodes = new TreeNode(nls.Item(i).Attributes[0].Value, "", "", nls.Item(i).Attributes[1].Value, "");
                                treenode.ChildNodes.Add(nodes);
                                //this.TreeView1.Nodes.Add(nodes);
                                //Response.Write("&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" + nls.Item(i).Attributes[0].Value + "</br>");
                                //如果下面有子节点再下走
                                XmlNodeList nls1 = xe2.ChildNodes;//继续获取xe2子节点的所有子节点
                                foreach (XmlNode xn2 in nls1)//遍历
                                ...{
                                    XmlElement xe3 = (XmlElement)xn2;//转换类型
                                    if (xe3.Name == "Node")//如果找到
                                    ...{
                                        for (int j = 0; j < nls1.Count; j++)
                                        ...{
                                            //为３级节点添加子节点
                                            node = new TreeNode(nls1.Item(j).Attributes[0].Value, "", "", nls.Item(i).Attributes[1].Value, "");
                                            nodes.ChildNodes.Add(node);
                                            //Response.Write("&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" + nls1.Item(j).Attributes[0].Value + "</br>");
                                        }
                                        break;
                                    }
                                }
                            }
                            break;
                        }
                    }
                    break;
                }
            }
        }
    }