Backup/Discuz.Control/ListBoxTreeList.cs

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using System.Data;
using System.Web.UI;
using System.Web;
using System.Web.UI.WebControls;
using System.ComponentModel;

using Discuz.Common;
using Discuz.Data;

namespace Discuz.Control
{
	/// <summary>
    /// 树形列表框控件。
	/// </summary>
	[DefaultProperty("Text"),ToolboxData("<{0}:ListBoxTreeList runat=server></{0}:ListBoxTreeList>")]
    public class ListBoxTreeList : Discuz.Control.WebControl
	{
        /// <summary>
        /// 列表框控件变量
        /// </summary>
		public System.Web.UI.WebControls.ListBox TypeID=new System.Web.UI.WebControls.ListBox();
	
        public void BuildTree(DataTable dt, string textName, string valueName)
        {

            string SelectedType = "0";

            TypeID.SelectedValue = SelectedType;

            this.Controls.Add(TypeID);

            TypeID.Items.Clear();
            //加载树
            TypeID.Items.Add(new ListItem("请选择     ", "0"));
            DataRow[] drs = dt.Select(this.ParentID + "=0");

            foreach (DataRow r in drs)
            {
                TypeID.Items.Add(new ListItem(r[textName].ToString(), r[valueName].ToString()));
                string blank = HttpUtility.HtmlDecode("&nbsp;&nbsp;&nbsp;&nbsp;");
                BindNode(r[0].ToString(), dt, textName, valueName, blank);
            }
            TypeID.DataBind();
        }

        /// <summary>
        /// 创建树结点
        /// </summary>
        /// <param name="sonparentid">当前数据项</param>
        /// <param name="dt">数据表</param>
        /// <param name="blank">空白符</param>
        private void BindNode(string sonparentid, DataTable dt, string textName, string valueName, string blank)
		{
			DataRow [] drs = dt.Select(this.ParentID+"=" + sonparentid );
			
			foreach( DataRow r in drs )
			{
				string nodevalue = r[valueName].ToString();				
				string text = r[textName].ToString();
                text = blank + text;