dapper 执行sql语句

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SqlSugarClient db = SugarContext.GetInstance();
//执行sql语句，处理
//1.执行sql，转成list
List list1 = db.SqlQuery("select * from teacher where tsex=@tsex", new { tsex = "女" });
Console.WriteLine(list1.ToJsonString());
//2.转成dynamic
dynamic list2 = db.SqlQueryDynamic("select * from UserInfo");
Console.WriteLine(list2.Length);
//3.转成json数据
string list3 = db.SqlQueryJson("select * from UserInfo");
Console.WriteLine(list3);
//4.返回int
int count = db.SqlQuery("select count(*) from UserInfo").FirstOrDefault();
Console.WriteLine(count);

//5.返回键值对类型
Dictionary list4 = db.SqlQuery>("select UserID,Name from UserInfo")
    .ToDictionary(q => q.Key, q => q.Value);
Console.WriteLine(list4.ToJsonString());

//6.返回List 集合
List list5 = db.SqlQuery("select  * from teacher where tsex=@tsex", new { tsex = "女" });
Console.WriteLine(list5.ToJsonString());

 

 

 

 

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

decimal result3 = db.GetDecimal(" select avg(degree) from score");
Console.WriteLine(result3);

 

 

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