dropdownlist基本用法

1 基本数据绑定 

#region DDL数据初始绑定
        /// <summary>
        /// DDL词典类别数据初始绑定
        /// </summary>
        void DDLTypeDataInitBind(DropDownList DDL)
        {
            DataSet ds = new DataSet();
            ds = Business.DictionaryClass.GetList("");
            DDL.DataSource = ds;
            DDL.DataTextField = "Title";
            DDL.DataValueField = "Id";
            DDL.DataBind();
            DDL.Items.Insert(0, new ListItem("--请选择词典类型--", "-1"));

        }

2 大写26个字母绑定

 

 /// <summary>
        /// DDL首字母数据初始绑定
        /// </summary>
        /// <param name="DDL"></param>
        void DDLFirstLettersInitBind(DropDownList DDL)
        {
            DDL.Items.Clear();
            for (int i = 65; i <= 90; i++)
            {
                DDL.Items.Add(new ListItem(Convert.ToChar(i).ToString(), Convert.ToChar(i).ToString()));

            }
            DDL.Items.Insert(0, new ListItem("--请选择首字母--","-1"));
        }