subsonic操作实例
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一、查询 1）简单查询 一种方式（分解构造式） SubSonic.Queryquery = TPjWorkday.CreateQuery(); query.SelectList = TPjWorkday.Columns.Year+ ", " + TPjWorkday.Columns.Yearmonth + "," + TPjWorkday.Columns.Workdays; query.AddWhere(TPjWorkday.Columns.Year,yearNum); query.OrderBy = SubSonic.OrderBy.Asc(TPjWorkday.Columns.Yearmonth); DataTabledt = query.ExecuteDataSet().Tables[0]; returndt; 另外一种方式（LINQ式） SqlQuery query= newSelect(TPjWorkday.Columns.Year, TPjWorkday.Columns.Yearmonth, TPjWorkday.Columns.Workdays).From(TPjWorkday.Schema ).Where(TPjWorkday.Columns.Year).IsEqualTo(yearNum).OrderAsc(TPjWorkday.Columns.Yearmonth); DataTabledt = query.ExecuteDataSet().Tables[0];
2）LIKE查询 queryBuilder.AddWhere(TBaseAddressbook.Columns.Name, Comparison.Like,"%"+this.tbName.Text+"%");
3）查询单值 SqlQuery query = newSelect(TBaseDepartment.Columns.Deptname).From(TBaseDepartment.Schema ).Where(TBaseDepartment.Columns.Deptid).IsEqualTo(deptid); return query.ExecuteScalar().ToString();
4）多表连接查询（连接查询的表的数量超过3个最好使用视图） 根据单位ID获取用户 SqlQuery query=newSelect(TBaseUser.UseridColumn,TBaseUser.UsernameColumn, TBaseUser.PersonnameColumn, TBaseUser.PhonecodeColumn, TBaseUser.EmailColumn) .From(TBaseUser.Schema).InnerJoin(TLstUserindepartment.UseridColumn, TBaseUser.UseridColumn) .Where(TBaseUser.EnabledColumn).IsEqualTo(1) .And(TLstUserindepartment.DeptidColumn).IsEqualTo(deptid) .OrderAsc(TBaseUser.Columns.Userid); DataTabledt = query.ExecuteDataSet().Tables[0]; 注意InnerJoin（f2,f1）的用法。也就是说当两个表连接时，From语句里面的表要放在后面。
5）分页查询 （方式一，Query） //Query方式分页,序号列使用rowindex, oracle数据库 Query query1 = newQuery(TBaseUser.Schema); query1.SelectList = TBaseUser.Columns.Userid+ "," + TBaseUser.Columns.Personname + ","+ TBaseUser.Columns.Phonecode+","+ TBaseUser.Columns.Email + ","+ TBaseUser.Columns.Userindex; query1.AddWhere(TBaseUser.Columns.Issignedin,Comparison.Equals, 1);//登录状态 query1.AND(TBaseUser.Columns.Enabled,Comparison.Equals, 1);//启用 query1.OrderBy = OrderBy.Asc(TBaseUser.Columns.Userindex); int sum= query1.GetRecordCount();//用于计算总页数 query1.PageSize = 12;//分页大小 query1.PageIndex = pagenum -1;//当前页 DataTableViewData = query1.ExecuteDataSet().Tables[0]; if(sum%12==0) this.lbPageCount.Text= (sum / 12).ToString(); else this.lbPageCount.Text= (sum / 12+1).ToString(); this.lbPageNum.Text= pagenum.ToString();
（方式二、SqlQuery） //SqlQuery方式分页，序号列使用row_number oracle数据库 SqlQuery query = newSelect().From(VWfSupervisor.Schema).Where(VWfSupervisor.Columns.Userid).IsEqualTo(CreateUserInfo().userid).OrderAsc(VWfSupervisor.Columns.Userid); int sum = query.GetRecordCount();//未分页前，总记录数 query.Paged(pagenum - 1, 12); DataTable ViewData = query.ExecuteDataSet().Tables[0]; if(sum%12==0) this.lbPageCount.Text= (sum / 12).ToString(); else this.lbPageCount.Text= (sum / 12+1).ToString(); this.lbPageNum.Text= pagenum.ToString();
二、插入，更新和删除 插入和更新操作都是通过实体的Save()方法来实现的，判断更新与插入操作主要体现在实体的IsNew属性，如果IsNew==true，则执行的是插入操作，反之执行的是更新操作。 当实例化一个实体时，如TPjWorkday newworkday = newTPjWorkday()，此时的newworkday.IsNew=true; 当实例化传入参数时， TPjAttendancetime attendanceTime = newTPjAttendancetime(Convert.ToInt32(dt.Rows[0]["flowid"]));此时的newworkday.IsNew=false。
1.插入 TPjWorkday newworkday = newTPjWorkday(); newworkday.Year = Convert.ToInt32(lbYear.Text); newworkday.Yearmonth= Convert.ToInt32(this.lbYear.Text)* 100 + (i + 1); newworkday.Workdays = workStr; newworkday.Save();
newInsert(TLstUserinrole.Schema,false).Value(TLstUserinrole.UseridColumn,2).Value(TLstUserinrole.RoleidColumn, 2) .Value(TLstUserinrole.CreatebyColumn,3).Value(TLstUserinrole.CreatetimeColumn, DateTime.Now).Execute(); 其中false表示不是全部字段。默认为true
2.更新 单字段逐渐更新方式，传入主键字段值 TPjAttendancetime attendanceTime = newTPjAttendancetime(Convert.ToInt32(dt.Rows[0]["flowid"])); attendanceTime.Begintime = Convert.ToDateTime(tbBeginTime.Value); attendanceTime.Endtime = Convert.ToDateTime(tbEndTime.Value); attendanceTime.AM1 = Convert.ToDateTime(dlAm1.SelectedValue).ToShortTimeString(); attendanceTime.AM2 = Convert.ToDateTime(dlAm2.SelectedValue).ToShortTimeString(); attendanceTime.PM1 = Convert.ToDateTime(dlPm1.SelectedValue).ToShortTimeString(); attendanceTime.PM2 = Convert.ToDateTime(dlPm2.SelectedValue).ToShortTimeString(); attendanceTime.Modifyby = Convert.ToInt32(Request.QueryString["userid"]); attendanceTime.Modifytime = System.DateTime.Now; attendanceTime.Save();
newUpdate(TPjInnernews.Schema).Set(TPjInnernews.NewstitleColumn).EqualTo("123").Where(TPjInnernews.NewsidColumn).IsEqualTo(3);
复合主键更新方式，（userid，ascxid） newUpdate(TLstUserhomepage.Schema).Set(TLstUserhomepage.Columns.Modifytime).EqualTo(System.DateTime.Now).Set(TLstUserhomepage.Columns.Modifyby).EqualTo(3).Where(TLstUserhomepage.UseridColumn) .IsEqualTo(409).And(TLstUserhomepage.AscxidColumn).IsEqualTo(11).Execute();
//修改记录, 先取得对象，然后再更新 TBaseStatistictype=newSelect().From(TBaseStatistic.Schema).Where(TBaseStatistic.Columns.Typeid).IsEqualTo(int.Parse(GetEQString("Typeid"))) .And(TBaseStatistic.Columns.Statid).IsEqualTo(int.Parse(this.Label3.Text)).ExecuteScalar(); type.Statname = this.TextBox1.Text.Trim(); type.Stattabname = this.Label1.Text; type.Statcolname = this.Label12.Text; type.Statcolid = this.Label7.Text; type.Datecolname= this.Label14.Text; type.Wherepart= this.Label8.Text; type.Save();
UPDATE table set column=column+1 int records = newUpdate(Product.Schema) .SetExpression("UnitPrice").EqualTo("UnitPrice * 3") .Where("productid").IsEqualTo(1) .Execute();
3.删除 Query q = TPjWorkday.CreateQuery(); q.WHERE(TPjWorkday.Columns.Year, Convert.ToInt32(lbYear.Text)); q.QueryType = QueryType.Delete; q.Execute();
TPjWorkday.Delete(TPjWorkday.Columns.Yearmonth, "200901");
三、事务处理 using (SharedDbConnectionScopesp = newSharedDbConnectionScope()) { using (TransactionScopescope = newTransactionScope()) { //数据库操作 // 不能使用平台的自增操作，否则会报错： {"无法加载 DLL“oramts.dll”: 找不到指定的模块。 (异常来自HRESULT:0x8007007E)。"} //CACA.BusinessLogic.Util.CounterUtil.increment("EntityInnernews") scope.Complete(); } }
List<SqlQuery>list = newList<SqlQuery>(); list.Add(newDelete().From(TBaseAddressbook.Schema).Where(TBaseAddressbook.Columns.Serialno).IsEqualTo(lbl.Text)); list.Add(newDelete().From(TBaseAddressbookusual.Schema).Where(TBaseAddressbookusual.Columns.Serialno).IsEqualTo(lbl.Text)); SqlQuery.ExecuteTransaction(list);
List<Insert>list=new List<Insert>();
存储过程： //StoredProcedure spd = newStoredProcedure("GetDataTable"); //spd.Command.AddParameter("@userid",userid); //spd.Command.AddOutputParameter("@dataresult"); //spd.Execute();
四、SubSonic直接执行SQL语句(后门，当遇到无法解决的问题时，直接写SQL语句) SubSonic直接执行SQL语句可以使用以下方式：
//执行sql语句，返回datatable QueryCommand qc = newQueryCommand(strSql.ToString(), null);
dt =DataService.GetDataSet(qc).Tables[0];
public void Inline_Simple() { QueryCommandcmd = new InlineQuery().GetCommand("SELECT productID from products"); Assert.IsTrue(cmd.CommandSql== "SELECT productID fromproducts"); }
public void Inline_WithCommands() { QueryCommandcmd = new InlineQuery() .GetCommand(@"SELECTproductID from products WHEREproductid=@productid", 1);
Assert.IsTrue(cmd.Parameters[0].ParameterName== "@productid"); Assert.IsTrue((int)cmd.Parameters[0].ParameterValue== 1); }
public void Inline_AsCollection() { ProductCollectionproducts = newInlineQuery() .ExecuteAsCollection<ProductCollection>( @"SELECTproductID from products WHEREproductid=@productid", 1); }
五、常用方法的返回值 Execute(),返回受影响的记录条数 //ExecuteScalar()，返回一个object，（System.Decimal类型的值） ExecuteSingle<T>()，返回T类型的对象，例如可以用这个方法获得满足要求的实体对象。 TDicItem item= newSelect().From(TDicItem.Schema).Where(TDicItem.Columns.Dicitemid).IsEqualTo(2) .And(TDicItem.Columns.Dictypeid).IsEqualTo(1030).ExecuteSingle<TDicItem>();
ExecuteDataSet(),返回一个记录集DataSet ExecuteTypedList<T>();返回List<T>,对象的列表，例如 List<Product>products = new Select().From<Product>() .Where(Product.ProductIDColumn).IsEqualTo(4) .Paged(1, 30) .ExecuteTypedList<Product>(); 转自他人文章！ |