Hl.Code/TreeHelper.cs

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using System.Data;
using System.Text;

namespace Hl.Code
{
    public class TreeHelper
    {
        #region "绑定树形下拉菜单"

        /// <summary>
        /// 绑定树形下拉菜单
        /// </summary>
        public static DataTable BindTreeSelect(DataTable myTable, string pidText, string keyName = "Id", string valName = "Name", string pidName = "ParentId", string levelText = "")
        {
            DataRow[] drs = myTable.Select(pidName + "=" + pidText);
            DataTable newdt = myTable.Clone();
            foreach (DataRow dataRow in drs)
            {
                dataRow[valName] = levelText + (DataConvert.ToInt(dataRow[pidName], 0) == 0 ? "" : "|--") + dataRow[valName].ToString();
                newdt.ImportRow(dataRow);
                DataTable subdt = BindTreeSelect(myTable, dataRow[keyName].ToString(), keyName, valName, pidName, levelText + "　　");
                foreach (DataRow row in subdt.Rows)
                {
                    newdt.ImportRow(row);
                }
            }
            return newdt;
        }

        #endregion

        #region "初始数型结构数据"

        /// <summary>
        /// 树形下拉框
        /// </summary>
        public static DataTable InitTreeData(DataTable myTable, string pidText, string keyName = "Id", string valName = "Name", string pidName = "ParentId", string levelText = "")
        {
            DataRow[] drs = myTable.Select(pidName + "=" + pidText);
            DataTable newdt = myTable.Clone();
            foreach (DataRow dataRow in drs)
            {
                newdt.ImportRow(dataRow);
                DataTable subdt = InitTreeData(myTable, dataRow[keyName].ToString(), keyName, valName, pidName, levelText);
                foreach (DataRow row in subdt.Rows)
                {
                    newdt.ImportRow(row);
                }
            }
            return newdt;
        }

        #endregion

        #region "获取数型结构字符"

        /// <summary>
        /// 树形下拉框
        /// </summary>
        public static string InitTreeString(DataTable myTable, string pidText, string keyName = "Id", string valName = "Name", string pidName = "ParentId", string levelText = "")