/// <summary>
 /// 获得查重后指定列的字符串集合
 /// </summary>
 /// <param name="dt"></param>
 /// <param name="ColumnName"></param>
 /// <param name="Split"></param>
 /// <returns></returns>
 public static IEnumerable <string> GetStrValue(this DataTable dt, string ColumnName)
 {
     return(CommonFormatStrTools.GetDataTableColValues(dt, ColumnName));
 }