ServiceStack.OrmLite 基本操作

原文：https://www.cnblogs.com/wang2650/category/780821.html

原文：https://www.cnblogs.com/xxfcz/p/7045808.html

在NuGet上需要安装这两个包：

　　ServiceStack.OrmLite

　　ServiceStack.OrmLite.SqlServer

注意一下环境哦，这里我使用的版本是 4.0.62，不同版本语法上肯定是有差异的，

还有就是为什么装的是个老版本，本地的VS装不了最新的版本，新版本好像要用到Core 2.0。以后再试试最近的版本了，空了来。

全部代码：

using ServiceStack;
using ServiceStack.DataAnnotations;
using ServiceStack.OrmLite;
using ServiceStack.Text;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp2.test1
{
    public class Class12
    {
        //ServiceStack.OrmLite
        //原文：https://www.cnblogs.com/xxfcz/p/7045808.html
        //原文：https://www.cnblogs.com/wang2650/category/780821.html

        public void test1()
        {
            //查询数据
            string connString = "data source=.\\sqlexpress;initial catalog=MyDbContext;user id=sa;password=sa;";
            var dbFactory = new OrmLiteConnectionFactory(connString, SqlServerDialect.Provider);
            using (var db = dbFactory.Open())
            {
                var roles = db.Select<Book>();
                "Roles: {0}".Print(roles.Dump());//输出到控制台
            }
        }

        public void test2()
        {
            //创建表，如果表已存在，那么删除后再创建
            OrmLiteConfig.DialectProvider = SqlServerDialect.Provider;
            string connString = "data source=.\\sqlexpress;initial catalog=MyDbContext;user id=sa;password=sa;";
            using (var db = connString.OpenDbConnection())
            {
                db.DropAndCreateTable<Book2>();
            }
        }

        public void test3()
        {
            //创建表，并插入一条数据。表如果已存在，则不插入数据
            string connectionString = "data source=.\\sqlexpress;initial catalog=MyDbContext;user id=sa;password=sa;";
            var dbFactory = new OrmLiteConnectionFactory(connectionString, SqlServerDialect.Provider);
            using (var db = dbFactory.Open())
            {
                if (db.CreateTableIfNotExists<Book2>())
                {
                    db.Insert(new Book2 { Id = , Name = "Seed Data" });
                }
            }
        }

        public void test4()
        {
            //插入
            string connectionString = "data source=.\\sqlexpress;initial catalog=MyDbContext;user id=sa;password=sa;";
            var dbFactory = new OrmLiteConnectionFactory(connectionString, SqlServerDialect.Provider);
            using (var db = dbFactory.Open())
            {
                //db.CreateTableIfNotExists<Book2>();
                //db.Insert(new Book2 { Id = 1, Name = "Seed Data1" });
                //db.Insert(new Book2 { Id = 2, Name = "Seed Data2" });
                //db.Insert(new Book2 { Id = 3, Name = "Seed Data3" });
                //db.Insert(new Book2 { Id = 4, Name = "Seed Data4" });
                //db.Insert(new Book2 { Id = 5, Name = "Seed Data5" });

                ////异步 新增
                //Task<long> task = db.InsertAsync(new Book2 { Id = 6, Name = "Seed Data6" });
                //Console.WriteLine("The Sum is:" + task.Result);

                ////只新增 指定字段
                //db.InsertOnly<Book2>(new Book2 { Id = 6, Name = "Seed Data6" }, c => c.Id);

                ////新增数据 返回自增长ID。 这里需要修改一下环境，数据库表设置主键、设置自增长，Model的Id增加特性AutoIncrement、PrimaryKey
                //long id = db.Insert(new Book2 { Name = "Seed Data5" }, selectIdentity: true);
                //Console.WriteLine(id);

                ////插入数据的时候，自动插入创建时间等 通用字段
                ////全局的 插入时 过滤
                //OrmLiteConfig.InsertFilter = (dbCmd, row) => {
                //    var auditRow = row as BaseEntity;
                //    if (auditRow != null)
                //        auditRow.CreatedDate = auditRow.ModifiedDate = DateTime.UtcNow;
                //};
                ////db.CreateTableIfNotExists<Book3>();
                //db.Insert(new Book3 { Id = 3, Name = "Seed Data3" });
                //db.Insert(new Book3 { Id = 4, Name = "Seed Data4" });
                //db.Insert(new Book3 { Id = 5, Name = "Seed Data5" });

                ////直接执行sql语句
                //db.ExecuteSql("INSERT INTO Book2 (Id, Name) VALUES (@Id, @Name)", new Book2 { Id = 5, Name = "Seed Data5" });

                //批量添加
                int i = ;
                var rows = "A,B,B,C,C,C,D,D,E".Split(',').Map(x => new Book2 { Name = x, Id = (i++) });
                db.InsertAll(rows);
            }
        }

        public void test5()
        {
            //删除
            string connectionString = "data source=.\\sqlexpress;initial catalog=MyDbContext;user id=sa;password=sa;";
            var dbFactory = new OrmLiteConnectionFactory(connectionString, SqlServerDialect.Provider);
            using (var db = dbFactory.Open())
            {
                //db.DeleteById<Book2>(0);
                //db.Delete<Book2>(new Book2 { Id = 1, Name = "B" });
                //db.Delete<Book2>(p => p.Name == "D");

                ////这里没有测试成功，原因未知
                //var updatedRow = db.SingleById<Book4>(1); // fresh version
                //db.DeleteById<Book4>(id: updatedRow.Id, rowVersion: updatedRow.RowVersion);
            }
        }

        public void test6()
        {
            string connectionString = "data source=.\\sqlexpress;initial catalog=MyDbContext;user id=sa;password=sa;";
            var dbFactory = new OrmLiteConnectionFactory(connectionString, SqlServerDialect.Provider);
            using (var db = dbFactory.Open())
            {
                //db.Update(new Book2 { Id = 2, Name="BB" });
                // sql:UPDATE "Person" SET "FirstName" = 'Jimi',"LastName" = 'Hendrix',"Age" = 27 WHERE "Id" = 1

                //db.Update(new Book2 { Id=1, Name = "CCCC" }, p => p.Name == "BBCCB");
                //Console.WriteLine(db.GetLastSql());

                ////部分更新
                //db.UpdateNonDefaults(new Book2 { Name = "CC" }, p => p.Name == "CCCC");

                ////部分更新
                //db.UpdateOnly(new Book2 { Name = "DD" },
                //onlyFields: p => new { p.Name },
                //where: p => p.Id == 1);

                //先获取 再更新
                var updatedRow = db.SingleById<Book2>();
                updatedRow.Name = "AA";
                db.Update(updatedRow);

                //打印SQL语句
                Console.WriteLine(db.GetLastSql());
            }
        }

        public void test7()
        {

        }

        public class Book4
        {
            public int Id { get; set; }
            public string Name { get; set; }
            public ulong RowVersion { get; set; }
        }

        public class BaseEntity
        {
            public int Id { get; set; }
            public DateTime CreatedDate { get; set; }
            public DateTime ModifiedDate { get; set; }
            public string ModifiedBy { get; set; }
        }

        public class Book3 : BaseEntity
        {
            public string Name { get; set; }
        }

        [Serializable]
        [Alias("Book2")]
        public class Book2
        {
            //[AutoIncrement]
            //[PrimaryKey]
            public int Id { get; set; }
            public string Name { get; set; }
        }

        [Serializable]
        [Alias("Book")]
        public class Book
        {
            public int Id { get; set; }
            public string Name { get; set; }
        }
    }
}