using System; using System.Data; using System.Linq; namespace BLL { /// <summary> /// 字符串操作辅助类 /// </summary> public class StringHelper { /// <summary> /// 字符串转换 /// 'A,B,C' => 'A','B','C' /// </summary> /// <param name="str"></param> /// <returns></returns> public static string StringConvert(string str) { string result = string.Empty; if (!string.IsNullOrWhiteSpace(str)) { string[] items = str.Split(','); result = string.Join(",", items.Select(x => $"'{x}'")); } return result; } } }