绑定DropDownList

        /// <summary>
        /// 绑定DropDownList
        /// </summary>
        /// <param name="dl">DropDownList</param>
        /// <param name="tArray">TDataEnum[]</param>
        /// <param name="isManualNoID">是否DataTextField绑定ManualNO</param>
        /// <param name="isNullBind">是否DropDownList空绑定</param>
        /// <param name="isFirstEmpty">是否第一个值为空</param>
        public static void BindEnum(this DropDownList dl, TDataEnum[] tArray, bool isManualNoID, bool isNullBind,bool isFirstEmpty)
        {
            if (tArray != null && tArray.Length > 0 && !isNullBind)
            {
                dl.DataSource = tArray;
                dl.DataTextField = isManualNoID ? "ManualNO" : "EnumDataName";
                dl.DataValueField = "EnumDataID";
            }
            dl.DataBind();
            if (isFirstEmpty)
            {
                dl.Items.Insert(0, new ListItem(string.Empty,Guid.Empty.ToString()));
                dl.SelectedIndex = -1;
            }
        }