using SqlSugar;
//创建数据库对象 (用法和EF Dappper一样通过new保证线程安全)
SqlSugarClient Db = new SqlSugarClient(new ConnectionConfig()
{
ConnectionString = "datasource=demo.db", //Server=.;Database=ManInfo;User Id=sa;Password=saxxxxxx; //MSSQL
DbType = DbType.Sqlite,
IsAutoCloseConnection = true
},
db => {
db.Aop.OnLogExecuting = (sql, pars) =>
{
//获取原生SQL推荐 5.1.4.63 性能OK
Console.WriteLine(UtilMethods.GetNativeSql(sql, pars));
//获取无参数化SQL 对性能有影响，特别大的SQL参数多的，调试使用
//Console.WriteLine(UtilMethods.GetSqlString(DbType.SqlServer,sql,pars))
};
//注意多租户 有几个设置几个
//db.GetConnection(i).Aop
});
//建库
Db.DbMaintenance.CreateDatabase();//达梦和Oracle不支持建库
//建表（看文档迁移）
Db.CodeFirst.InitTables<Student>(); //所有库都支持
//查询表的所有
var list = Db.Queryable<Student>().ToList();
//插入
Db.Insertable(new Student() { SchoolId = 1, Name = "jack" }).ExecuteCommand();
//更新
Db.Updateable(new Student() { Id = 1, SchoolId = 2, Name = "jack2" }).ExecuteCommand();
//删除
Db.Deleteable<Student>().Where(it => it.Id == 1).ExecuteCommand();
Console.WriteLine("恭喜你已经入门了,后面只需要用到什么查文档就可以了。");
Console.ReadKey();
//实体与数据库结构一样
public class Student
{
//数据是自增需要加上IsIdentity
//数据库是主键需要加上IsPrimaryKey
//注意：要完全和数据库一致2个属性
[SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
public int Id { get; set; }
public int? SchoolId { get; set; }
public string? Name { get; set; }
// 新增字段
[SugarColumn(IsNullable = true)]
}
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