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对比Model前后数据保存不同值
1.示例代码
public class SysLogBLL<T,W> : BLLBase where T : new() { #region 比较方法 /// <summary> /// 复制对象到指定对象中 只复制名称一样的 /// </summary> /// <param name="obj"></param> /// <returns></returns> public T Clone(W obj) { Type objTye = typeof(T); Type objTyeW = typeof(W); T t = new T(); PropertyInfo[] proinfos = objTye.GetProperties(); PropertyInfo[] proinfosw = objTyeW.GetProperties(); foreach (var i in proinfos) { foreach (var j in proinfosw) { if (i.Name == j.Name) { object o = j.GetValue(obj, null); if (i.GetSetMethod() != null) { i.SetValue(t, o, null); } } } } return t; } public T Clone(T obj) { Type objTye = typeof(T); T model = new T(); PropertyInfo[] properties = objTye.GetProperties(); foreach (PropertyInfo property in properties) { if (!property.IsSpecialName) { object o = property.GetValue(obj, null); if (property.GetSetMethod() != null) { property.SetValue(model, o, null); } } } return model; } private bool IsEqual(Type dataType, object oldObj, object newObj) { if (oldObj == null && newObj == null) return true; if (oldObj != null && newObj != null) { if (dataType == typeof(int)) return (int)oldObj == (int)newObj; if (dataType == typeof(decimal)) return (decimal)oldObj == (decimal)newObj; if (dataType == typeof(double)) return (double)oldObj == (double)newObj; if (dataType == typeof(Guid)) return (Guid)oldObj == (Guid)newObj; if (dataType == typeof(DateTime)) return (DateTime)oldObj == (DateTime)newObj; if (dataType == typeof(string)) return (string)oldObj == (string)newObj; return true; //return oldObj.Equals(newObj); } else { if (dataType.BaseType == typeof(object)) return true; else return false; } } /// <summary> /// 比较两个实体，然后返回实体中每个属性值不同的内容 /// </summary> /// <param name="oldObj"></param> /// <param name="newObj"></param> /// <returns></returns> public List<Hashtable> Compare(T oldObj, T newObj) { Type objTye = typeof(T); List<Hashtable> list = new List<Hashtable>(); // FieldInfo[] myFields = objTye.GetFields(BindingFlags.Public | BindingFlags.Instance); PropertyInfo[] proinfos = objTye.GetProperties(); try { foreach (var item in proinfos) { object o = item.GetValue(oldObj, null); object n = item.GetValue(newObj, null); var itype = item.PropertyType.GetGenericArguments(); Type itemtype = itype.Length > 0 ? itype[0] : item.PropertyType; if (!IsEqual(itemtype, o, n)) { Hashtable hs = new Hashtable(); hs.Add("Key", item.Name); hs.Add("KeyType", (itemtype != null ? itemtype.Name : item.PropertyType.Name)); hs.Add("oValue", o); hs.Add("nValue", n); list.Add(hs); } } } catch (Exception ex) { throw; } return list; } #endregion #region 保存LogAction /// <summary> /// 保存数据 /// </summary> /// <param name="Lgaction">Crm_LogAction 对象</param> /// <param name="originaldata">原始对象数据</param> /// <param name="currentdata">当前对象数据</param> /// <returns></returns> public bool SaveLogActoin(Crm_LogAction Lgaction, T originaldata, T currentdata) { bool result = false; //执行结果 if (Lgaction != null) { try { MainEntities.Crm_LogAction.Add(Lgaction); MainEntities.SaveChanges();
List<Hashtable> lt = Compare(originaldata, currentdata);
if (lt.Count() > 0) { foreach (var h in lt) { Hashtable hitem = h as Hashtable; if (hitem != null && hitem.Count > 0) { MainEntities.Crm_LogActionDetail.Add(new Crm_LogActionDetail { LogId = Lgaction.LogId, ColumnName = hitem["Key"].ToString(), ColumnDataType = hitem["KeyType"].ToString(), CreateTime = DateTime.Now, CreateUser = CurrentUser.Name + "[" + CurrentUser.Id + "]", NewValue = hitem["nValue"].ToString(), OldValue = hitem["oValue"].ToString(), }); } } MainEntities.SaveChanges(); result = true; } } catch (Exception) { result = false; } } return result; } /// <summary> /// 保存数据 /// </summary> /// <param name="TableName">表名</param> /// <param name="OperationId">操作类型 0=add 1=delte 2=update </param> /// <param name="originaldata"></param> /// <param name="currentdata"></param> /// <returns></returns> public bool SaveLogActoin(string TableName, int OperationId, T originaldata, T currentdata) { bool result = false; //执行结果 Crm_LogAction Lgaction=new Crm_LogAction (); try { var query = MainEntities.Crm_LogActionType.Where(w => w.TableName == TableName).SingleOrDefault(); if (query != null) { Lgaction= new Crm_LogAction { OperationId = OperationId,//修改=2 CreateTime = DateTime.Now, CreateUser = CurrentUser.Name + "[" + CurrentUser.Id + "]", LogTypeId = query.TypeId, TableName = query.TableName, BusinessName = query.BusinessName }; MainEntities.Crm_LogAction.Add(Lgaction); MainEntities.SaveChanges(); List<Hashtable> lt = Compare(originaldata, currentdata);if (lt.Count() > 0) { foreach (var h in lt) { Hashtable hitem = h as Hashtable; if (hitem != null && hitem.Count > 0) { MainEntities.Crm_LogActionDetail.Add(new Crm_LogActionDetail { LogId = Lgaction.LogId, ColumnName = hitem["Key"].ToString(), ColumnDataType = hitem["KeyType"].ToString(), CreateTime = DateTime.Now, CreateUser = CurrentUser.Name + "[" + CurrentUser.Id + "]", NewValue =hitem["nValue"]==null?"": hitem["nValue"].ToString(), OldValue =hitem["oValue"]==null?"": hitem["oValue"].ToString(), }); } } MainEntities.SaveChanges(); result = true; } } } catch (Exception) { result = false; } return result; } #endregion }
2.调用示例：
SysLogBLL<Crm_Contact, ContactBankCreateOrEdit> Syslog = new SysLogBLL<Crm_Contact, ContactBankCreateOrEdit>();
Crm_Contact currentdata = http://www.mamicode.com/Syslog.Clone(model); //新数据
Crm_Contact originaldata = http://www.mamicode.com/dModel;
Syslog.SaveLogActoin("Crm_Contact", 2, originaldata, currentdata);
对比Model前后数据保存不同值
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