TreeView 动态绑定数据及在当前节点操作

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            this.tvwList.Nodes.Clear();//绑定之前清除所有treeview里的节点数据
            bindTree(this.tvwList.Nodes, "0");//调用绑定treeview节点方法
        }
    }

    ///<summary>
    /// 修改当前节点
    ///</summary>
    ///<param name="sender"></param>
    ///<param name="e"></param>
    protected void btnModify_Click(object sender, EventArgs e)
    {
        if (!string.IsNullOrEmpty(this.txtUpdate.Text))
        {
            ProductTypeSearchModel product = new ProductTypeSearchModel();
            product.TypeName=this.txtUpdate.Text;
            product.TypeId = Convert.ToInt32(this.tvwList.SelectedNode.Value);
            if (ProductTypeSearchBLL.ModifyProductTypeSearch(product) > 0)
            {
                Response.Write("<script>alert('节点名称修改成功');window.location.href=window.location.href</script>");
            }
            else
            {
                Response.Write("<script>alert('节点名称修改失败')</script>");
            }
        }
        else
        {
            Response.Write("<script>alert('节点名称不能为空')</script>");
        }
    }

    ///<summary>
    /// 新增节点
    ///</summary>
    ///<param name="sender"></param>
    ///<param name="e"></param>
    protected void btnAdd_Click(object sender, EventArgs e)
    {
        if (!string.IsNullOrEmpty(this.txtAdd.Text))
        {
            ProductTypeSearchModel product = new ProductTypeSearchModel();
            product.TypeName = this.txtAdd.Text;
            product.TypeParentId = Convert.ToInt32(this.tvwList.SelectedNode.Value);
            if (ProductTypeSearchBLL.AddProductTypeSearch(product) > 0)
            {
                Response.Write("<script>alert('节点名称新增成功');window.location.href=window.location.href</script>");
            }
            else
            {
                Response.Write("<script>alert('节点名称新增失败')</script>");
            }
        }
        else
        {
            Response.Write("<script>alert('节点名称不能为空')</script>");
        }
    }

    ///<summary>
    /// 选择节点变化时
    ///</summary>
    ///<param name="sender"></param>
    ///<param name="e"></param>
    protected void tvwList_SelectedNodeChanged(object sender, EventArgs e)
    {
        this.lblNow.Text = "当前选定节点为：" + this.tvwList.SelectedNode.Text;
        this.txtUpdate.Text = this.tvwList.SelectedNode.Text;
    }

    ///<summary>
    /// 绑定treeview
    ///</summary>
    ///<param name="tnc">treeview的nodes</param>
    ///<param name="parentId">父ID</param>
    protected void bindTree(TreeNodeCollection tnc, string parentId)
    {
        //创建DataView         

        DataView dview = new DataView();
        dview.Table = ProductTypeSearchBLL.GetProductTypeSearch();

        //加条件
        dview.RowFilter = "TypeParentId='" + parentId + "'";
        foreach (DataRowView rows in dview)
        {
            TreeNode tn = new TreeNode();
            tn.Value = rows["TypeId"].ToString();
            tn.Text = rows["TypeName"].ToString();

            //如果实现点击节点文字展开收缩效果的话下面这句代码

            //tn.SelectAction = TreeNodeSelectAction.Expand;
            tnc.Add(tn);
            //TreeView1.Nodes.Add(tn);
            DataView dv = new DataView();
            dv.Table = ProductTypeSearchBLL.GetProductTypeSearch();

            //判断是不是存在drv["flbh"]的ChildNodes，存在的话添加，不存在就继续遍历

            dv.RowFilter = "TypeParentId='" + rows["TypeId"].ToString() + "'";
            if (dv.Count != 0)
            {
                bindTree(tn.ChildNodes, tn.Value);
            }
        }
    }

    ///<summary>
    /// 删除节点
    ///</summary>
    ///<param name="sender"></param>
    ///<param name="e"></param>
    protected void btnDel_Click(object sender, EventArgs e)
    {
        int typeId = Convert.ToInt32(this.tvwList.SelectedNode.Value);
        if (ProductTypeSearchBLL.DelProductTypeSearch(typeId) > 0)
        {
            Response.Write("<script>alert('节点名称删除成功');window.location.href=window.location.href</script>");
        }
        else
        {
            Response.Write("<script>alert('节点名称删除失败')</script>");
        }
    }