asp.net中md5加密實現代碼

代碼如下

複製代碼

public class FormatStr { #region MD5加密 /// <summary> /// MD5加密操作 /// </summary> /// <param name="str">加密的字串</param> /// <returns></returns> public static string MD5(string str) {  return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5"); } #endregion  #region 去除HTML標記 /// <summary> /// 去除HTML標記 /// </summary> /// <param name="NoHTML">包括HTML的源碼 </param> /// <returns>已經去除後的文字</returns> public static string NoHTML(string Htmlstring) { //刪除指令碼 Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase); //刪除HTML Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"([rn])[s]+", "", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", """, RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "xa1", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "xa2", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "xa3", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "xa9", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&#(d+);", "", RegexOptions.IgnoreCase); Htmlstring.Replace("<", ""); Htmlstring.Replace(">", ""); Htmlstring.Replace("rn", ""); Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim(); return Htmlstring; } #endregion  #region 去除非法字串 /// <summary> /// 去除非法字串 /// </summary> /// <param name="strChar">原字串</param> /// <returns>過濾過的字串</returns> public static string ReplaceBadChar(string strChar) { if (strChar.Trim() == "") { return ""; } else { strChar = strChar.Replace("'", ""); strChar = strChar.Replace("*", ""); strChar = strChar.Replace("?", ""); strChar = strChar.Replace("(", ""); strChar = strChar.Replace(")", ""); strChar = strChar.Replace("<", ""); strChar = strChar.Replace("=", ""); return strChar.Trim(); } } #endregion #region 檢察是否都是數字 /// <summary> /// 檢察是否都是數字 /// </summary> /// <param name="str">要檢查的字串</param> /// <returns>bool</returns> public static bool IsNumeric(string str) { Regex reg = new Regex(@"^[+]?d*$"); return reg.IsMatch(str); } #endregion #region 檢察是否正確的Email格式 /// <summary> /// 檢察是否正確的Email格式 /// </summary> /// <param name="str">要檢查的字串</param> /// <returns>bool</returns> public static bool IsEmail(string str) { Regex reg = new Regex(@"^([w-.]+)@(([[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.)|(([w-]+.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(]?)$"); return reg.IsMatch(str); } #endregion #region 檢察是否正確的日期格式 /// <summary> /// 檢察是否正確的日期格式 /// </summary> /// <param name="str">要檢查的字串</param> /// <returns>bool</returns> public static bool IsDate(string str) { //考慮到了4年一度的366天，還有特殊的2月的日期 Regex reg = new Regex(@"^((((1[6-9]|[2-9]d)d{2})-(0?[13578]|1[02])-(0?[1-9]|[12]d|3[01]))|(((1[6-9]|[2-9]d)d{2})-(0?[13456789]|1[012])-(0?[1-9]|[12]d|30))|(((1[6-9]|[2-9]d)d{2})-0?2-(0?[1-9]|1d|2[0-8]))|(((1[6-9]|[2-9]d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-0?2-29-)) (20|21|22|23|[0-1]?d):[0-5]?d:[0-5]?d$"); return reg.IsMatch(str); } #endregion #region HTML轉換為字串 /// <summary> /// HTML轉換為字串，轉換標識 /// </summary> /// <param name="str"></param> /// <returns></returns> public static string htmToStr(string str) { return str.Replace("'", "mySQ;").Replace(""", "myDQ;").Replace("<", "myLt;").Replace(">", "myGt;").Replace("-", "myMl;").Replace("_", "myBl;").Replace("%", "myBs;").Replace("?", "myQe;").Replace("*", "myAl;"); } #endregion #region 字串轉換為HTML /// <summary> /// 字串轉換為HTML，將還原標識 /// </summary> /// <param name="str"></param> /// <returns></returns> public static string strToHtm(string str) { if (str == null) return ""; return str.Replace("mySQ;", "'").Replace("myDQ;", """).Replace("myLt;", "<").Replace("myGt;", ">").Replace("myMl;", "-").Replace("myBl;", "_").Replace("myBs;", "%").Replace("myQe;", "?").Replace("myAl;", "*"); } #endregion #region 文本轉換為HTML /// <summary> /// 文本轉換為HTML，更換（n） /// </summary> /// <param name="str"></param> /// <returns></returns> public static string textToHtm(string str) { return str.Replace("t", " ").Replace("<", "<").Replace(">", ">").Replace(" ", " ").Replace("rn", "<br>").Replace("n", "<br>"); } #endregion #region 文本轉換為輸入框內容 /// <summary> /// 文本轉換為輸入框內容， /// </summary> /// <param name="str"></param> /// <returns></returns> public static string HtmToInputValue(string str) { //return str.Replace("<","<").Replace(">",">").Replace(""",""").Replace("&","&"); return str.Replace(""", """); } #endregion #region 防Sql注入攻擊 /// <summary> /// 防Sql注入攻擊 /// </summary> /// <param name="strQueryName"></param> /// <returns></returns> public static string getQueryString(string strQueryName) { //(')(--)(or )(=) System.Web.HttpRequest myRequest = System.Web.HttpContext.Current.Request; string str1 = myRequest.QueryString[strQueryName]; if (str1 == null) return ""; str1 = str1.Replace("'", "’").Replace("--", "—").Replace("=", "＝").Replace("or", "o r").Replace("Or", "O r").Replace("OR", "O R").Replace("oR", "o R").Replace(">", "〉").Replace("<", "〈"); return str1; } #endregion #region 防Sql注入攻擊 /// <summary> /// 防Sql注入攻擊 /// </summary> /// <param name="strQueryName"></param> /// <returns></returns> public static string getSQLString(string strQueryName) { if (strQueryName == null) return ""; strQueryName = strQueryName.Replace("'", "’").Replace("--", "—").Replace("=", "＝").Replace("or", "o r").Replace("Or", "O r").Replace("OR", "O R").Replace("oR", "o R").Replace(">", "〉").Replace("<", "〈"); return strQueryName; } #endregion }