C#敏感词汇过滤(不是正则)

System.Text.StringBuilder sb = newSystem.Text.StringBuilder(text.Length);

 stringfilterText = "需要过滤的脏字 以|分开";

 //脏字 可根据自己的方式用分隔符

 string[] filterData = filterText.Split('|');

 foreach(var item infilterData)

 {

  charvalue = item[0];

  if(dicList.ContainsKey(value))

   dicList[value].Add(item);

  else

   dicList.Add(value,newList<string>() { item });

 }

 intcount = text.Length;

 for(inti = 0; i < count; i++)

 {

  charword = text[i];

  if(dicList.ContainsKey(word))//如果在字典表中存在这个key

  {

   intnum = 0;//是否找到匹配的关键字 1找到0未找到

   var data = dicList[word].OrderBy(g => g.Length);

   //把该key的字典集合按 字符数排序(方便下面从少往多截取字符串查找)

   foreach(var wordbook indata)

   {

    if(i + wordbook.Length <= count)

    //如果需截取的字符串的索引小于总长度 则执行截取

    {

     stringresult = text.Substring(i, wordbook.Length);

     //根据关键字长度往后截取相同的字符数进行比较

     if(result == wordbook)

     {

      num = 1;

      sb.Append(GetString(result));

      i = i + wordbook.Length - 1;

      //比较成功 同时改变i的索引

      break;

     }

    }

   }

   if(num == 0)

    sb.Append(word);

  }

  else

   sb.Append(word);

 }

 returnsb.ToString();

}

/// <summary>

/// 替换星号

/// </summary>

/// <param name="value"></param>

/// <returns></returns>

privatestatic string GetString(stringvalue)

{

 stringstarNum = string.Empty;

 for(inti = 0; i < value.Length; i++)

 {

  starNum += "*";

 }

 returnstarNum;

}