/// <summary>
/// Method that evaluates a given school level based on the
/// level of the groups in it. The current logic is very simple:
/// We get the Mode Level of all Groups.
/// </summary>
/// <param name="school">A School type object to evaluate level</param>
/// <returns>The calculated level for the School</returns>
public int EvaluateSchoolLevel(School school)
{
var schoolLevel = school.Groups.GroupBy(v => v.Level)
.OrderByDescending(g => g.Count())
.First()
.Key;
return schoolLevel;
}
protected void Page_Load(object sender, EventArgs e)
{
using (SqlSugarClient db = SugarDao.GetInstance())//开启数据库连接
{
string aaa = null;
var xxx= db.Queryable<School>().Where(it => it.name==aaa ).ToList();
var sl2 = db.Sqlable().Form<Student>("s").SelectToList<Student>("id");
var sl = db.Sqlable().Form<Student>("s").SelectToList<Student>("*");
db.Delete<Student,int>(1, 2);
//开启事务，可以不使用事务,也可以使用多个事务
db.BeginTran();
//db.CommitTran 提交事务会,在using结束前自动执行，可以不声名
//db.RollbackTran(); 事务回滚，catch中声名
//查询是允许脏读的，可以声名多个（默认值:不允许）
db.IsNoLock = true;
try
{
/************************************************************************************************************/
/*********************************************1、实体生成****************************************************/
/************************************************************************************************************/
//根据当前数据库生成所有表的实体类文件 （参数：SqlSugarClient ，文件目录，命名空间）
//db.ClassGenerating.CreateClassFiles(db,Server.MapPath("~/Models"),"Models");
//根据表名生成实体类文件
//db.ClassGenerating.CreateClassFilesByTableNames(db, Server.MapPath("~/Models"), "Models" , "student","school");
//根据表名生成class字符串
var str = db.ClassGenerating.TableNameToClass(db, "Student");
//根据SQL语句生成class字符串
var str2 = db.ClassGenerating.SqlToClass(db, "select top 1 * from Student", "student");
/************************************************************************************************************/
/*********************************************2、查询********************************************************/
/************************************************************************************************************/
//---------Queryable<T>,扩展函数查询---------//
//针对单表或者视图查询
//查询所有
var student = db.Queryable<Student>().ToList();
var stud = new Student() { id = db.GetInt("select top 1 id from Student") };
//查询单条
var single = db.Queryable<Student>().Single(c => c.id==stud.id);
//取10-20条
var page1 = db.Queryable<Student>().Where(c => c.id > 10).OrderBy("id").Skip(10).Take(20).ToList();
//上一句的简化写法，同样取10-20条
var page2 = db.Queryable<Student>().Where(c => c.id > 10).OrderBy("id").ToPageList(2, 10);
//查询条数
var count = db.Queryable<Student>().Where(c => c.id > 10).Count();
//从第2条开始以后取所有
var skip = db.Queryable<Student>().Where(c => c.id > 10).OrderBy("id").Skip(2).ToList();
//取前2条
var take = db.Queryable<Student>().Where(c => c.id > 10).OrderBy("id").Take(2).ToList();
// Not like
string conval = "a";
var notLike = db.Queryable<Student>().Where(c => !c.name.Contains(conval.ToString())).ToList();
// 可以在拉姆达使用 ToString和 Convert,比EF出色的地方
var convert1 = db.Queryable<Student>().Where(c => c.name == "a".ToString()).ToList();
var convert2 = db.Queryable<Student>().Where(c => c.id == Convert.ToInt32("1")).ToList();//
var convert3 = db.Queryable<Student>().Where(c => DateTime.Now > Convert.ToDateTime("2015-1-1")).ToList();
var convert4 = db.Queryable<Student>().Where(c => DateTime.Now > DateTime.Now).ToList();
//支持字符串Where 让你解决，更复杂的查询
var student12 = db.Queryable<Student>().Where(c => "a" == "a").Where("id>100").ToList();
//存在记录反回true，则否返回false
bool isAny100 = db.Queryable<Student>().Any(c => c.id == 100);
bool isAny1 = db.Queryable<Student>().Any(c => c.id == 1);
int maxId= db.Queryable<Student>().Max<Student,int>("id");
int minId = db.Queryable<Student>().Where(c=>c.id>10).Min<Student, int>("id");
//---------Sqlable,创建多表查询---------//
//多表查询
List<School> dataList = db.Sqlable()
.Form("school", "s")
.Join("student", "st", "st.id", "s.id", JoinType.INNER)
.Join("student", "st2", "st2.id", "st.id", JoinType.LEFT).Where("s.id>100 and s.id<@id").SelectToList<School>("st.*", new { id = 1 });
//多表分页
List<School> dataPageList = db.Sqlable()
.Form("school", "s")
.Join("student", "st", "st.id", "s.id", JoinType.INNER)
.Join("student", "st2", "st2.id", "st.id", JoinType.LEFT).Where("s.id>100 and s.id<100").SelectToPageList<School>("st.*", "s.id", 1, 10);
//---------SqlQuery,根据SQL或者存储过程---------//
//用于多用复杂语句查询
var School = db.SqlQuery<Student>("select * from Student");
//获取id
var id = db.SqlQuery<int>("select top 1 id from Student").Single();
//存储过程
//var spResult = db.SqlQuery<school>("exec sp_school @p1,@p2", new { p1=1,p2=2 });
/************************************************************************************************************/
/*************************************************3、添加****************************************************/
/************************************************************************************************************/
School s = new School()
{
name = "蓝翔"
};
//插入单条
var id2 = Convert.ToInt32(db.Insert(s));
//插入多条
List<School> sList = new List<School>();
sList.Add(s);
var ids = db.InsertRange(sList);
/************************************************************************************************************/
/*************************************************4、修改****************************************************/
/************************************************************************************************************/
//指定列更新
db.Update<School>(new { name = "蓝翔2" }, it => it.id == id);
db.Update<School,int>(new { name = "蓝翔2" }, 1,3,12);
db.Update<School, string>(new { name = "蓝翔2" },new string []{"1","2"});
//整个实体更新,注意主键必需为实体类的第一个属性
db.Update<School>(new School { id = id, name = "蓝翔2" }, it => it.id == id);
/************************************************************************************************************/
/*************************************************5、删除****************************************************/
/************************************************************************************************************/
db.Delete<School,int>(10);//注意主键必需为实体类的第一个属性
db.Delete<School>(it => it.id > 100);
db.Delete<School,string>(new string[] { "100", "101", "102" });
//db.FalseDelete<school>("is_del", 100);
//等同于 update school set is_del=0 where id in(100)
//db.FalseDelete<school>("is_del", it=>it.id==100);
/************************************************************************************************************/
/*************************************************6、基类****************************************************/
/************************************************************************************************************/
string sql = "select * from Student";
db.ExecuteCommand(sql);
db.GetDataTable(sql);
db.GetList<Student>(sql);
db.GetSingle<Student>(sql + " where id="+stud.id);
using (SqlDataReader read = db.GetReader(sql)) { } //事务中一定要释放DataReader
db.GetScalar(sql);
db.GetString(sql);
db.GetInt(sql);
}
catch (Exception ex)
{
//回滚事务
db.RollbackTran();
throw ex;
}
}//关闭数据库连接
}
/// <summary>
/// Method that evaluates a given school experience based on the
/// experience of the groups in it. The current logic is very simple:
/// We get the Avarage experience of all Groups.
/// </summary>
/// <param name="school">A School type object to evaluate experience</param>
/// <returns>The calculated experience for the School</returns>
public int EvaluateSchoolExperience(School school)
{
var schoolExperience = school.Groups.Sum(x => x.Experience);
return (int)(schoolExperience / school.Groups.Count());
}
/// <summary>
/// Method that evaluates a given school points based on the
/// points of the groups in it. The current logic is very simple:
/// We get the Avarage points of all Groups.
/// </summary>
/// <param name="school">A School type object to evaluate points</param>
/// <returns>The calculated points for the School</returns>
public int EvaluateSchoolPoints(School school)
{
var schoolPoints = school.Groups.Sum(x => x.Points);
return (int)(schoolPoints / school.Groups.Count());
}