原文:构建ASP.NET MVC4+EF5+EasyUI+Unity2.x注入的后台管理系统（12）-系统日志和异常的处理②

上一讲我们做了日志与异常的结果显示列表，这一节我们讲要把他应用系统中来。

首先我们在App.Common类库中创建一个通用类ResultHelper，这个类里面写了，获取一个GUID，获取当前时间，处理字符串等操作，虽然我们目前要用到的一个就是获取GUID但是以后我们可能还要用到别的，所以我都把他放进入了

然后在App.Admin创建一个核心文件夹,Core，放入LogHandler这个类是主要是写入日志，避免在每次都要实例化这个类，我把他封装起来，大家一看就知道。

然后修改Controller的Create方法，代码如下一一给出。

usingSystem;usingSystem.Web;usingSystem.Text.RegularExpressions;namespaceApp.Common
{public classResultHelper{/// <summary>///创建一个全球唯一的32位ID/// </summary>/// <returns>ID串</returns>public static stringNewId{get{string id = DateTime.Now.ToString("yyyyMMddHHmmssfffffff");string guid = Guid.NewGuid().ToString().Replace("-", "");id+= guid.Substring(0, 10);returnid;}}public static stringNewTimeId{get{string id = DateTime.Now.ToString("yyyyMMddHHmmssfffffff");returnid;}}/// <summary>///截取字符串/// </summary>/// <param name="value">字符串</param>/// <param name="length">剩下长度</param>/// <returns>指定字符串并加...</returns>public static string SubValue(string value, intlength){if (value.Length >length){value= value.Substring(0, length); value = value + "..."; returnNoHtml(value);}else { returnNoHtml(value); }}//还原的时候public static string InputText(stringinputString){if ((inputString != null) && (inputString !=String.Empty)){inputString=inputString.Trim();//if (inputString.Length > maxLength)//inputString = inputString.Substring(0, maxLength);inputString = inputString.Replace("<br>", "\n");inputString= inputString.Replace("&", "&amp");inputString= inputString.Replace("'", "''");inputString= inputString.Replace("<", "&lt");inputString= inputString.Replace(">", "&gt");inputString= inputString.Replace("chr(60)", "&lt");inputString= inputString.Replace("chr(37)", "&gt");inputString= inputString.Replace("\"", "&quot");inputString= inputString.Replace(";", ";");returninputString;}else{return "";}}//添加的时候public static string OutputText(stringoutputString){if ((outputString != null) && (outputString !=String.Empty)){outputString=outputString.Trim();outputString= outputString.Replace("&amp", "&");outputString= outputString.Replace("''", "'");outputString= outputString.Replace("&lt", "<");outputString= outputString.Replace("&gt", ">");outputString= outputString.Replace("&lt", "chr(60)");outputString= outputString.Replace("&gt", "chr(37)");outputString= outputString.Replace("&quot", "\"");outputString= outputString.Replace(";", ";");outputString= outputString.Replace("\n", "<br>");returnoutputString;}else{return "";}}/// <summary>///去除HTML标记/// </summary>/// <param name="NoHTML">包括HTML的源码</param>/// <returns>已经去除后的文字</returns>public static string NoHtml(stringHtmlstring){//删除脚本Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);//删除HTMLHtmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);Htmlstring= Regex.Replace(Htmlstring, @"([\r\n])[\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= Regex.Replace(Htmlstring, @"&hellip;", "", RegexOptions.IgnoreCase);Htmlstring= Regex.Replace(Htmlstring, @"&mdash;", "", RegexOptions.IgnoreCase);Htmlstring= Regex.Replace(Htmlstring, @"&ldquo;", "", RegexOptions.IgnoreCase);Htmlstring.Replace("<", "");Htmlstring= Regex.Replace(Htmlstring, @"&rdquo;", "", RegexOptions.IgnoreCase);Htmlstring.Replace(">", "");Htmlstring.Replace("\r\n", "");Htmlstring=HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();returnHtmlstring;}/// <summary>///格式化文本（防止SQL注入）/// </summary>/// <param name="str"></param>/// <returns></returns>public static string Formatstr(stringhtml){System.Text.RegularExpressions.Regex regex1= new System.Text.RegularExpressions.Regex(@"<script[\s\S]+</script *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);System.Text.RegularExpressions.Regex regex2= new System.Text.RegularExpressions.Regex(@"href *= *[\s\S]*script *:", System.Text.RegularExpressions.RegexOptions.IgnoreCase);System.Text.RegularExpressions.Regex regex3= new System.Text.RegularExpressions.Regex(@"on[\s\S]*=", System.Text.RegularExpressions.RegexOptions.IgnoreCase);System.Text.RegularExpressions.Regex regex4= new System.Text.RegularExpressions.Regex(@"<iframe[\s\S]+</iframe *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);System.Text.RegularExpressions.Regex regex5= new System.Text.RegularExpressions.Regex(@"<frameset[\s\S]+</frameset *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);System.Text.RegularExpressions.Regex regex10= new System.Text.RegularExpressions.Regex(@"select", System.Text.RegularExpressions.RegexOptions.IgnoreCase);System.Text.RegularExpressions.Regex regex11= new System.Text.RegularExpressions.Regex(@"update", System.Text.RegularExpressions.RegexOptions.IgnoreCase);System.Text.RegularExpressions.Regex regex12= new System.Text.RegularExpressions.Regex(@"delete", System.Text.RegularExpressions.RegexOptions.IgnoreCase);html= regex1.Replace(html, ""); //过滤<script></script>标记html = regex2.Replace(html, ""); //过滤href=javascript: (<A>) 属性html = regex3.Replace(html, "_disibledevent="); //过滤其它控件的on...事件html = regex4.Replace(html, ""); //过滤iframehtml = regex10.Replace(html, "s_elect");html= regex11.Replace(html, "u_pudate");html= regex12.Replace(html, "d_elete");html= html.Replace("'", "’");html= html.Replace("&nbsp;", " ");returnhtml;}/// <summary>///检查SQL语句合法性/// </summary>/// <param name="sql"></param>/// <returns></returns>public static bool ValidateSQL(string sql, ref stringmsg){if (sql.ToLower().IndexOf("delete") > 0){msg= "查询参数中含有非法语句DELETE";return false;}if (sql.ToLower().IndexOf("update") > 0){msg= "查询参数中含有非法语句UPDATE";return false;}if (sql.ToLower().IndexOf("insert") > 0){msg= "查询参数中含有非法语句INSERT";return false;}return true;}//获取当前时间public staticDateTime NowTime{get{returnDateTime.Now;}}/// <summary>///将日期转换成字符串/// </summary>/// <param name="dt">日期</param>/// <returns>字符串</returns>public static string DateTimeConvertString(DateTime?dt){if (dt == null){return "";}else{returnConvert.ToDateTime(dt.ToString()).ToShortDateString();}}/// <summary>///将字符串转换成日期/// </summary>/// <param name="str">字符串</param>/// <returns>日期</returns>public static DateTime? StringConvertDatetime(stringstr){if (str == null){return null;}else{try{returnConvert.ToDateTime(str);}catch{return null;}}}public static stringGetUserIP(){if (System.Web.HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null)return System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].Split(new char[] { ',' })[0];elsereturn System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];}}
}

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Web;usingApp.Common;usingApp.DAL;usingApp.IBLL;usingApp.Models;usingMicrosoft.Practices.Unity;namespaceApp.Admin
{public static classLogHandler{[Dependency]public static ISysLogBLL logBLL { get; set; }/// <summary>///写入日志/// </summary>/// <param name="oper">操作人</param>/// <param name="mes">操作信息</param>/// <param name="result">结果</param>/// <param name="type">类型</param>/// <param name="module">操作模块</param>public static void WriteServiceLog(string oper, string mes, string result, string type, stringmodule){SysLog entity= newSysLog();entity.Id=ResultHelper.NewId;entity.Operator=oper;entity.Message=mes;entity.Result=result;entity.Type=type;entity.Module=module;entity.CreateTime=ResultHelper.NowTime;using (SysLogRepository logRepository = newSysLogRepository()){logRepository.Create(entity);}}}
}

[HttpPost]publicJsonResult Create(SysSampleModel model){if(m_BLL.Create(model)){LogHandler.WriteServiceLog("虚拟用户", "Id:" + model.Id + ",Name:" + model.Name, "成功", "创建", "样例程序");return Json(1, JsonRequestBehavior.AllowGet);}else{LogHandler.WriteServiceLog("虚拟用户", "Id:" + model.Id + ",Name:" + model.Name, "失败", "创建", "样例程序");return Json(0, JsonRequestBehavior.AllowGet);}}

同时App.Common要引用程序集System.Web

运行添加一条记录,然后打开我们的日志模块，OK，日志记录完成了，有点简单。

接下来是异常，上一讲说到，异常我们放在BLL中处理，然后我们把错误或者异常信息返回到Controller中被日志记录，当然异常他是在BLL层被记录的。

我们需要一个异常的集合类，来记录BLL层和DAL层，有时候DAL也要处理异常，所以我们也要用到ref 引用传递，貌似ref我们很喜欢，呵呵

见代码，在App.Common创建一个异常集合类

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;namespaceApp.Common
{public classValidationError{publicValidationError() { }public string ErrorMessage { get; set; }}public class ValidationErrors : List<ValidationError>{/// <summary>///添加错误/// </summary>/// <param name="errorMessage">信息描述</param>public void Add(stringerrorMessage){base.Add(new ValidationError { ErrorMessage =errorMessage });}/// <summary>///获取错误集合/// </summary>public stringError{get{string error = "";this.All(a =>{error+=a.ErrorMessage;return true;});returnerror;} }}
}

我们也要创建一个封装好的异常写入，类似与Log的LogHandler封装但我们放在BLL中，因为我们以后的其他项目的BLL要引用，这一步要考虑到。
在BLL中创建文件夹Core，写入以下类，BLL引用程序集System.Web里面用到了http的一些方法

usingSystem;usingSystem.Web.Configuration;usingApp.Models;usingSystem.IO;usingSystem.Text;usingApp.Common;namespaceApp.BLL.Core
{/// <summary>///写入一个异常错误/// </summary>/// <param name="ex">异常</param>public static classExceptionHander{/// <summary>///加入异常日志/// </summary>/// <param name="ex">异常</param>public static voidWriteException(Exception ex){try{using (DBContainer db = newDBContainer()){SysException model= newSysException(){Id=ResultHelper.NewId,HelpLink=ex.HelpLink,Message=ex.Message,Source=ex.Source,StackTrace=ex.StackTrace,TargetSite=ex.TargetSite.ToString(),Data=ex.Data.ToString(),CreateTime=ResultHelper.NowTime};db.SysException.AddObject(model);db.SaveChanges();}}catch(Exception ep){try{//异常失败写入txtstring path = @"~/exceptionLog.txt";string txtPath = System.Web.HttpContext.Current.Server.MapPath(path);//获取绝对路径using (StreamWriter sw = new StreamWriter(txtPath, true, Encoding.Default)){sw.WriteLine((ex.Message+ "|" + ex.StackTrace + "|" + ep.Message + "|" +DateTime.Now.ToString()).ToString());sw.Dispose();sw.Close();}return;}catch { return; }}}}}

此异常当处理也异常时候，将在网站根目录下写入一个txt文件。
创建一个全局变量

ValidationErrors errors = new ValidationErrors();

我们要用引用传递，所以要修改IBLL和BLL的Create方法，如下
ISysSampleBLL  ：  bool Create(ref ValidationErrors errors, SysSampleModel model);

SysSampleBLL   ：

 /// <summary>///创建一个实体/// </summary>/// <param name="errors">持久的错误信息</param>/// <param name="model">模型</param>/// <returns>是否成功</returns>/// <summary>///创建一个实体/// </summary>/// <param name="errors">持久的错误信息</param>/// <param name="model">模型</param>/// <returns>是否成功</returns>public bool Create(refValidationErrors errors, SysSampleModel model){try{SysSample entity=Rep.GetById(model.Id);if (entity != null){errors.Add("主键重复");return false;}entity= newSysSample();entity.Id=model.Id;entity.Name=model.Name;entity.Age=model.Age;entity.Bir=model.Bir;entity.Photo=model.Photo;entity.Note=model.Note;entity.CreateTime=model.CreateTime;if (Rep.Create(entity) == 1){return true;}else{errors.Add("插入失败");return false;}}catch(Exception ex){errors.Add(ex.Message);ExceptionHander.WriteException(ex);return false;}}

修改Controller

[HttpPost]publicJsonResult Create(SysSampleModel model){if (m_BLL.Create(referrors, model)){LogHandler.WriteServiceLog("虚拟用户", "Id:" + model.Id + ",Name:" + model.Name, "成功", "创建", "样例程序");return Json(1, JsonRequestBehavior.AllowGet);}else{string ErrorCol =errors.Error;LogHandler.WriteServiceLog("虚拟用户", "Id:" + model.Id + ",Name:" + model.Name + "," + ErrorCol, "失败", "创建", "样例程序");return Json(0, JsonRequestBehavior.AllowGet);}}

注意：ExceptionHander.WriteException(ex);这里是写入异常信息

OK，你现在可以创建一条新的记录和插入一个ID大于50个字符的记录，让他记录日志和异常了。

显然我们的失败错误提示已经不符合国情了。我们返回的json格式是0和1我们要返回多个值了，比如1和成功创建，0和失败了啊，这样的2个值怎么办？

controller能把datagrid传过来的东西用类来接受，那么反过来想，js也能把controller发出去的值分解，创建一个序列化的类

在App.Common类库中创建JsonHandler帮助类，里面有2个重载，一个是返回3个值一个是2个值的。

所以当我们要返回订单的数量和总价格的时候，我们将用到类似的手段

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;namespaceApp.Common
{public classJsonHandler{public static JsonMessage CreateMessage(int ptype,string pmessage,stringpvalue){JsonMessage json= newJsonMessage(){type=ptype,message=pmessage,value=pvalue};returnjson;}public static JsonMessage CreateMessage(int ptype, stringpmessage){JsonMessage json= newJsonMessage(){type=ptype,message=pmessage,};returnjson;}}public classJsonMessage{public int type{get;set;}public string message{get;set;}public string value{get;set;}}
}

再次修改Controller的Create

[HttpPost]publicJsonResult Create(SysSampleModel model){if (m_BLL.Create(referrors, model)){LogHandler.WriteServiceLog("虚拟用户", "Id:" + model.Id + ",Name:" + model.Name, "成功", "创建", "样例程序");return Json(JsonHandler.CreateMessage(1, "插入成功"), JsonRequestBehavior.AllowGet);}else{string ErrorCol =errors.Error;LogHandler.WriteServiceLog("虚拟用户", "Id:" + model.Id + ",Name:" + model.Name + "," + ErrorCol, "失败", "创建", "样例程序");return Json(JsonHandler.CreateMessage(0, "插入失败" +ErrorCol), JsonRequestBehavior.AllowGet);}}

修改SysSample的Create的JS部分

<script type="text/javascript">$(function () {$("#btnSave").click(function () {if ($("#CreateForm").valid()) {$.ajax({url:"/SysSample/Create",type:"Post",data: $("#CreateForm").serialize(),dataType:"json",success: function (data) {if (data.type == 1) {window.parent.frameReturnByMes(data.message);window.parent.frameReturnByReload(true);window.parent.frameReturnByClose()}else{window.parent.frameReturnByMes(data.message);}}});}return false;});});</script>

由于时间关系，这一讲就先到这里吧！这一讲其实比较仓促。不懂的留言

你需要继续做的就是在删除，编辑等操作也加入这些的。这点留给大家自己表现吧....

下一讲是全局异常的捕获。