SqlSugar示例

使用SqlSugar执行sql语句

1.简单查询

 1 SqlSugarClient db = SugarContext.GetInstance();
 2 //执行sql语句，处理
 3 //1.执行sql，转成list
 4 List<teacher> list1 = db.SqlQuery<teacher>("select * from teacher where tsex=@tsex", new { tsex = "女" });
 5 Console.WriteLine(list1.ToJsonString());
 6 //2.转成dynamic
 7 dynamic list2 = db.SqlQueryDynamic("select * from UserInfo");
 8 Console.WriteLine(list2.Length);
 9 //3.转成json数据
10 string list3 = db.SqlQueryJson("select * from UserInfo");
11 Console.WriteLine(list3);
12 //4.返回int
13 int count = db.SqlQuery<int>("select count(*) from UserInfo").FirstOrDefault();
14 Console.WriteLine(count);
15 
16 //5.返回键值对类型
17 Dictionary<string, string> list4 = db.SqlQuery<KeyValuePair<string, string>>("select UserID,Name from UserInfo")
18     .ToDictionary(q => q.Key, q => q.Value);
19 Console.WriteLine(list4.ToJsonString());
20 
21 //6.返回List<string[]> 集合
22 List<string[]> list5 = db.SqlQuery<string[]>("select  * from teacher where tsex=@tsex", new { tsex = "女" });
23 Console.WriteLine(list5.ToJsonString());

2.汇总查询

 1 SqlSugarClient db = SugarContext.GetInstance();
 2 //更方便的获取第一行第一列
 3 string result1 = db.GetString(" select  name from UserInfo where UserID=@UserID", new { UserID = 1 });
 4 Console.WriteLine(result1);
 5 int count = db.GetInt("select count(*) from UserInfo");
 6 Console.WriteLine(count);
 7 double result2 = db.GetDouble("select avg(degree) from score where cno=@cno ", new System.Data.SqlClient.SqlParameter("@cno", "3-105"));
 8 Console.WriteLine(result2);
 9 
10 decimal result3 = db.GetDecimal(" select avg(degree) from score");
11 Console.WriteLine(result3);

3.执行视图、存储过程

 1 SqlSugarClient db = SugarContext.GetInstance();
 2 //执行视图查询
 3 List<student> list1 = db.SqlQuery<student>("select * from V_student");
 4 Console.WriteLine(list1.ToJsonString());
 5 //执行存储过程处理
 6 var pars = SqlSugarTool.GetParameters(new { pageStart = 1, pageEnd = 5, recordCount = 0 });
 7 //禁止清空参数
 8 db.IsClearParameters = false;
 9 pars[2].Direction = System.Data.ParameterDirection.Output;
10 List<student> list2 = db.SqlQuery<student>("exec proc_PageStudent @pageStart,@pageEnd,@recordCount output", pars);
11 db.IsClearParameters = true;//启用自动清空参数
12 var recordCount = pars[2].Value;
13 Console.WriteLine(list2.ToJsonString());
14 Console.WriteLine(recordCount);