如何去掉treeview节点前的"+"(该节点已经没有子节点)

Question

我的treeview是动态生成的，生成后每个节点前都有"+"，如何去掉？
当然当鼠标点后就自动去掉了，我想在生成时直接去掉，怎么办？还有个问题就是不能取根节点的值，怎么设置属性让它可以取值？谢谢！

Answer 1

我怎么没碰到过?...........你换下Skin看下

Answer 2

treeview的所有生成语句都在这里：
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;public partial class xczwgl_treeview_dwbm : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
           
            InitRoot(TreeView1);
            TreeView1.CollapseAll();
        }
    }
    //treeview start--------------------------------------------------------------------------------------
    //treeview start--------------------------------------------------------------------------------------
    private DataSet CreateDataSet(string sqlstr)
    {
        try
        {
            string strconn = Session["MyConnectionString"].ToString();
            SqlConnection myConn = new SqlConnection(strconn);
            myConn.Open();            SqlDataAdapter cd = new SqlDataAdapter();
            cd.SelectCommand = new SqlCommand(sqlstr, myConn);
            cd.SelectCommand.CommandType = CommandType.Text;            DataSet dsTree = new DataSet();
            cd.Fill(dsTree, "dic_dqdm");
            myConn.Close();
            return dsTree;
        }
        catch
        {
            Console.WriteLine("Exception in Main :");
            return null;
        }
    }    private void InitRoot(TreeView Nds)
    {
        try
        {
            DataView dvTree = new DataView();
            TreeNode tmpNd;
            string ls_parentcode;
            string ls_sql;
            if (Session["LoginDQDM"].ToString().Length <= 4)
            {
                ls_parentcode = Session["LoginDQDM"].ToString().Substring(0, Session["LoginDQDM"].ToString().Length - 2) + "00";
                ls_sql = "select code,define,parentcode from dic_dqdm where code like '" + Session["LoginDQDM"].ToString() + "%' and parentcode like '" + ls_parentcode + "%'";
            }
            else
            {
                //370101 县级单位
                ls_parentcode = Session["LoginDQDM"].ToString().Substring(0, Session["LoginDQDM"].ToString().Length - 4) + "0000";
                ls_sql = "select code,define,parentcode from dic_dqdm where code like '" + Session["LoginDQDM"].ToString().Substring(0, Session["LoginDQDM"].ToString().Length - 2) + "%' and parentcode like '" + ls_parentcode + "%'";            }
            DataSet ds = CreateDataSet(ls_sql);            dvTree.Table = ds.Tables["dic_dqdm"];
            foreach (DataRowView drvTree in dvTree)
            {
                tmpNd = new TreeNode();
                tmpNd.Value = drvTree["code"].ToString();
                tmpNd.Text = drvTree["define"].ToString();
                Nds.Nodes.Add(tmpNd);
                //if drvTree.Row.ToString 
                tmpNd.PopulateOnDemand = true;
                tmpNd.SelectAction = TreeNodeSelectAction.Expand;            }
        }
        catch
        {
            //
        }
    }
    private void AddChild(TreeNode tnd)
    {
        try
        {
            DataView dvTree = new DataView();
            TreeNode tmpNd;            DataSet ds = CreateDataSet("select code,define,parentcode from dic_dqdm where code like '" + Session["LoginDQDM"].ToString() + "%' and parentcode = '" + tnd.Value.ToString() + "'");
            dvTree.Table = ds.Tables["dic_dqdm"];
            dvTree.RowFilter = "parentcode='" + tnd.Value.ToString() + "'";
            foreach (DataRowView drvTree in dvTree)
            {
                tmpNd = new TreeNode();
                tmpNd.Value = drvTree["code"].ToString();
                tmpNd.Text = drvTree["define"].ToString();
                tnd.ChildNodes.Add(tmpNd);
                tmpNd.PopulateOnDemand = true;
            }
            if (tnd.ChildNodes.Count != 0)
                tnd.SelectAction = TreeNodeSelectAction.Expand;
        }
        catch
        {
            //
        }
    }    protected void TreeView1_TreeNodePopulate(object sender, TreeNodeEventArgs e)
    {
        AddChild(e.Node);
    }    protected void TreeView1_SelectedNodeChanged1(object sender, EventArgs e)
    {
        TextBox_dwmc.Text = TreeView1.SelectedNode.Text;
        TextBox_dwbm.Text = TreeView1.SelectedNode.Value;
    }    //treeview end  --------------------------------------------------------------------------------------
    //treeview end  --------------------------------------------------------------------------------------
}

Answer 3

http://blog.csdn.net/luq885/archive/2007/06/10/1646335.aspx
这里面有用ajax方法删除节点的例子，lz要实现的比这个要简单吧