标签：
存入数据库中，目前的字段包括操作人，操作时间，sql语句，被修改的字段，字段原值,操作人的身份。
/// <summary> /// 添加操作日志 /// </summary> /// <param name="strsql">执行的sql语句</param> /// <param name="username">执行人</param> /// <param name="dentity">执行人身份</param> /// <param name="cmdparms">参数</param> public static void AddLog(StringBuilder strsql,string username,string dentity,params SqlParameter[] cmdparms) { Graduate.Model.OperateLog model = new Graduate.Model.OperateLog(); model.dentity = dentity; model.operatUser = username; model.operatTime = DateTime.Now.ToString(); string content = strsql.ToString().Substring(0, strsql.ToString().IndexOf("values")); StringBuilder sblog = new StringBuilder(); sblog.Append(content + " values "); sblog.Append(" ( "); foreach (SqlParameter sp in cmdparms) { sblog.Append("‘" + sp.Value + "‘,"); } sblog.ToString().TrimEnd(‘,‘); sblog.Insert(sblog.Length - 1, ‘)‘); model.operatContent = sblog.ToString().TrimEnd(‘,‘); model.PrevValue = ""; model.NewValue = ""; Graduate.DAL.OperateLog dal = new OperateLog(); dal.Add(model); } /// <summary> /// 删除操作日志 /// </summary> /// <param name="strsql">sql语句</param> /// <param name="username">执行人</param> /// <param name="dentity">执行人身份</param> /// <param name="id">关键字段</param> /// <param name="hash">参数(Hasttable)</param> public static void DeleteLog(StringBuilder strsql, string username, string dentity, string id,Hashtable hash) { Graduate.Model.OperateLog logmodel = new Graduate.Model.OperateLog(); logmodel.dentity = dentity; logmodel.operatUser = username; StringBuilder sblog = new StringBuilder(); string conten = strsql.ToString().Substring(0, strsql.ToString().IndexOf(‘=‘)); sblog.Append(conten + " = "); sblog.Append(id.ToString()); logmodel.operatContent = sblog.ToString(); logmodel.operatTime = DateTime.Now.ToString(); string prevval = ""; foreach (DictionaryEntry de in hash) { prevval += de.Key + "=" + de.Value + ","; } prevval = prevval.TrimEnd(‘,‘); logmodel.PrevValue = prevval; logmodel.NewValue = ""; Graduate.DAL.OperateLog logdal = new OperateLog(); logdal.Add(logmodel); } /// <summary> /// 更新操作日志 /// </summary> /// <param name="obj1">原对象</param> /// <param name="parmhash">更新字段集(Hashtable)</param> /// <param name="username">执行人</param> /// <param name="dentity">执行人身份</param> /// <param name="tableName">表名</param> /// <param name="keytable">存储条件和值(Hashtable)</param> public static void UpdateLog(object obj1,Hashtable parmhash,string username,string dentity,string tableName,Hashtable keytable) { PropertyInfo[] properties = obj1.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance); StringBuilder consb = new StringBuilder(); Hashtable prevhash = new Hashtable(); Hashtable newhash = new Hashtable(); consb.Append(" update " + tableName + " set "); foreach (PropertyInfo pi in properties) { string piname = pi.Name; string pivalue = Convert.ToString(pi.GetValue(obj1, null)); foreach (DictionaryEntry de in parmhash) { if (piname == de.Key.ToString()) { if (pivalue != de.Value.ToString()) { if (!keytable.Contains(de.Key)) { consb.Append(de.Key + "=‘" + de.Value + "‘" + ","); } prevhash.Add(piname, pivalue); newhash.Add(piname, de.Value); } } } } consb.Remove(consb.Length - 1, 1); consb.Append(" where "); foreach (DictionaryEntry de in keytable) { consb.Append(de.Key + "=‘" + de.Value + "‘" + " and "); } consb.Remove(consb.Length - 4, 3); //去掉"and " string prevval = ""; foreach (DictionaryEntry de in prevhash) { prevval += de.Key + "=" + de.Value + ","; } prevval = prevval.TrimEnd(‘,‘); string newval = ""; foreach (DictionaryEntry de in newhash) { newval += de.Key + "=" + de.Value + ","; } newval = newval.TrimEnd(‘,‘); Graduate.Model.OperateLog logmodel = new Graduate.Model.OperateLog(); logmodel.dentity = dentity; logmodel.NewValue = newval; logmodel.operatContent = consb.ToString(); logmodel.operatTime = DateTime.Now.ToString(); logmodel.operatUser = username; logmodel.PrevValue = prevval; Graduate.DAL.OperateLog logdal = new OperateLog(); logdal.Add(logmodel); }
由于使用的是sqlhelper类，所以一般sql语句类似"insert into A (field) values (@field)",如果传入了参数，sql语句并不改变，因为使用的是StringBuilder连接字符串，而我需要具体到保存入数据库的sql也能 执行的地步，所以需要做各种拼接转换工作.
有一个地方结果是正确的，我却不明白为什么.看“添加操作”的 “ model.operatContent = sblog.ToString().TrimEnd(‘,‘);”；
拼接完insert语句后，总是在后面跟了个“，”还不知道是怎么产生的。需要trimEnd去掉","才算正确，想不明白
另外一个需要说的是，之所以放在DAL层，是因为传入了"执行人"和"执行人身份"这个两个字段，那么就需要为各个类的增改删方法添加这个方法了，这个工 作量就比较大，是很不好的，主要是因为不想修改sqlhelper。其实完全可以利用反射找出各个对象的属性和值，再一一比较，方法能够更加抽象出来，这 个等以后再说
标签：
原文地址：http://www.cnblogs.com/hnsongbiao/p/4472559.html
