DataTable 获取列名

#region 根据datatable获得列名     public static string[] GetColumnsByDataTable(DataTable dt)
        /// <summary>
        /// 根据datatable获得列名
       /// </summary>
        /// <param name="dt">表对象</param>
        /// <returns>返回结果的数据列数组</returns>
        public static string[] GetColumnsByDataTable(DataTable dt)
        {
            string[] strColumns = null;


            if (dt.Columns.Count > 0)
            {
                int columnNum = 0;
                columnNum = dt.Columns.Count;
                strColumns = new string[columnNum];
                for (int i = 0; i < dt.Columns.Count; i++)
                {
                    strColumns[i] = dt.Columns[i].ColumnName;
                }
            }


            return strColumns;
        } 
        #endregion