C#实现String字符串转化为SQL语句中的In后接的参数详解

实现把string字符串转化为in后可用参数代码：

public string stringtolist(string aa)
  {
    string bb1 = "(";
    if (!string.isnullorempty(aa.trim()))
    {
      
      string[] bb = aa.split(new string[] { "\r\n", ",", ";", "* " }, stringsplitoptions.removeemptyentries);
      for (int i = 0; i < bb.length; i++)
      {
        if (!bb1.contains(bb[i]))//去掉重复的輸入值
        {
          bb1 += "'" + bb[i] + "',";
        }
      }
    }
    bb1 = bb1.substring(0, bb1.lastindexof(",")) + ")";
    return bb1;
  }

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