C # Sensitive keywords filter code

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;

}

//该代码片段来自于: http://www.sharejs.com/codes/csharp/5486

C # Sensitive keywords filter code