Dapper入门学习

using (IDbConnection connection = new SqlConnection("server=.;database=Test;uid=sa;pwd=123456"))
{

　　　　　　　　　　
　　　　　　　　　//通过connection.Execute（sql，object）方法执行增删改
//UserInfo userInfo = new UserInfo();
//userInfo.Id = Guid.NewGuid();
//userInfo.UserName = "aa";
//userInfo.Name = "张三";
//string sql = "insert into UserInfo values(@id,@userName,@name)";
//connection.Execute(sql, userInfo);

//connection.Execute(sql, new
//{
//    Id = Guid.NewGuid(),
//    UserName = "bb",
//    Name = "张三1"
//});

//UserInfo userInfo = new UserInfo();
//userInfo.Id = Guid.NewGuid();
//userInfo.UserName = "aa";
//userInfo.Name = "张三";

//Comment comment = new Comment();
//comment.Id = Guid.NewGuid();
//comment.Content = "东西挺好的";
//comment.UserInfoId = userInfo.Id;
// string sql = "insert into UserInfo values(@id,@userName,@name)";
//connection.Execute(sql, userInfo);
//string sql1 = "insert into Comment values(@id,@Content,@UserInfoId)";
//connection.Execute(sql1, comment);

//userInfo.Name = "李四";
//string sqlupdate = "update UserInfo set name = @name where username=@username";
//connection.Execute(sqlupdate, userInfo);

//string sqldelete = "delete from userinfo where username = @username";
//connection.Execute(sqldelete, userInfo);

　　　　　　　　　//通过connection.Query(sql)执行查询
// string query = "select * from userinfo";
// var list =  connection.Query(query).ToList();
// foreach (dynamic d in list)
// {
//     Console.WriteLine(d.UserName);
// }

// string query1 = "select * from userinfo where username = @username";
//List<UserInfo> userInfos = connection.Query<UserInfo>(query1, new {username = "bb"}).ToList();
// foreach (UserInfo d in userInfos)
// {
//     Console.WriteLine(d.UserName);
// }

string query = "select * from userinfo u left join comment c on u.id=c.userInfoId";
////Query<TFirst, TSecond, TReturn>
//List<UserInfo> userInfos = connection.Query<UserInfo, Comment, UserInfo>(query,
//    (userInfo, comment) =>
//    {
//        if (userInfo.Comments == null)
//        {
//            userInfo.Comments = new List<Comment>();
//        }
//        userInfo.Comments.Add(comment);
//        return userInfo;
//    }
//).ToList();

　　　　　　　　　　//通过connection.QueryMultiple(sql)一次查询多个实体
//using (var multi = connection.QueryMultiple(query))
//{
//    var userInfoss = multi.Read<UserInfo>().ToList();

//    foreach (var userInfo in userInfoss)
//    {
//        Console.WriteLine(userInfo.UserName);
//    }
//}

//var user = connection.Query<UserInfo>("uspGetUser", new {id = "1A61D9E8-A295-4844-8EB1-3F390657CFBB"},
//    commandType: CommandType.StoredProcedure).SingleOrDefault();
//Console.WriteLine(user.Name);

Console.ReadKey();
}