public void Init()
{
using (SqlSugarClient db = SugarDao.GetInstance())//开启数据库连接
{
var r1 = db.GetDataTable("select * from student");
var r2 = db.GetSingle <Student>("select top 1 * from student");
var r3 = db.GetScalar("select count(1) from student");
var r4 = db.GetReader("select count(1) from student");
r4.Dispose();
var r5 = db.GetString("select top 1 name from student");
var r6 = db.ExecuteCommand("select 1");
}
}
protected void Page_Load(object sender, EventArgs e)
{
using (SqlSugarClient db = SugarDao.GetInstance())//开启数据库连接
{
var r1 = db.GetDataTable("select * from Student ");
var r2 = db.GetSingle <STUDENT>("SELECT * FROM (SELECT * FROM Student ORDER BY id DESC ) A where ROWNUM=1");
var r3 = db.GetScalar("select count(1) from Student");
var r4 = db.GetReader("select count(1) from Student");
r4.Dispose();
var r5 = db.GetString("SELECT name FROM (SELECT * FROM Student ORDER BY id DESC ) A where ROWNUM=1");
var r6 = db.ExecuteCommand("delete from Student where id=20");
}
}
protected void Page_Load(object sender, EventArgs e)
{
using (SqlSugarClient db = SugarDao.GetInstance())//开启数据库连接
{
var r1 = db.GetDataTable("select * from student");
var r2 = db.GetSingle <Student>("select * from student limit 0,1");
var r3 = db.GetScalar("select count(1) from student");
var r4 = db.GetReader("select count(1) from student");
r4.Dispose();
var r5 = db.GetString("select name from student limit 0,1");
var r6 = db.ExecuteCommand("select 1");
}
}
protected void Page_Load(object sender, EventArgs e)
{
using (SqlSugarClient db = SugarDao.GetInstance())//开启数据库连接
{
string aaa = null;
var xx = db.Queryable <School>().Where(it => true).ToList();
var xx2 = db.Queryable <Student>().Where(it => it.isOk == false).ToList();
var sl2 = db.Sqlable().Form <Student>("s").SelectToList <Student>("id");
var sl = db.Sqlable().Form <Student>("s").SelectToList <Student>("*");
db.Queryable <Student>().In("id", "1", "2", "3").ToList();
db.Queryable <Student>().In("id", new string[] { "1", "2", "3" }).ToList();
db.Queryable <Student>().In("id", new List <string> {
"1", "2", "3"
}).ToList();
var array = new string[] { "1", "2", "3" };
db.Queryable <Student>().Where(it => array.Contains(it.name));
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 > 0).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(new School {
id = id, name = "蓝翔2"
});
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
}
public string GetString(string sql, object pars)
{
return(_db.GetString(sql, pars));
}
protected void Page_Load(object sender, EventArgs e)
{
//连接字符串
string connStr = @"Server=.;uid=sa;pwd=sasa;database=SqlSugarTest";
using (SqlSugarClient db = new SqlSugarClient(connStr))//开启数据库连接
{
//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 = 1 };
//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);
//---------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);
//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>(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>(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=1");
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
}
