typeselect.cs

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using System;
using System.Data;
using System.Configuration;
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.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Web.UI.Design.WebControls;
using BookManage.Model;
using BookManage.BLL;

namespace BookManage.Control
{
    /// <summary>
    /// Summary description for TypeDropDownList
    /// </summary>

    public class BookTypeSelect : DropDownList
    {
       
      public void AutoBindData()
        {
            //base.Items.Clear();
            BookType bookType = new BookType();

            IList<BookTypeInfo> bookTypeInfo = bookType.GetBookTypeList();

            foreach (BookTypeInfo bti in bookTypeInfo)
            {

                string typeName = bti.BookTypeName;
                if (bti.LevelId > 1)
                {
                    string padding = null;
                    for (int i = 0; i <= bti.LevelId - 2; i++)
                    {
                        padding += "　";
                    }
                    typeName = padding + "└ " + typeName;
                }

                ListItem listItem = new ListItem();
                listItem.Text = typeName;
                listItem.Value = bti.BookTypeId.ToString();
                base.Items.Add(listItem);
            }
        }
       
    }


}