ManagedDataAccess连数据库

Posted 2020-11-29 富坚老贼

 

Oracle官方的托管数据库访问组件，单DLL，Oracle.ManagedDataAccess.dll，不安装Oracle客户端，不区分32/64位， 直接引用即可。

与非托管程序为Oracle.DataAccess.dll相比，不支持BulkCopy和CustomType等。

 

下载

https://www.oracle.com/database/technologies/odac-downloads.html

或者

nuget

 

文档

https://docs.oracle.com/cd/E11882_01/win.112/e23174/toc.htm

 

 

 类介绍

OracleCommand

OracleCommandBuilder

OracleConnection

OracleDataAdapter 

OracleDatabase 

OracleDataReader

OracleError 

OracleErrorCollection

OracleException

OracleInfoMessageEventArgs

OracleParameter 

OracleParameterCollection

OraclePermission

OraclePermissionAttribute

OracleRowUpdatedEventArgs

OracleRowUpdatingEventArgs

OracleTransaction

 

DataSet接收

            DataSet ds = new DataSet();
            string str = @"Data Source=xxx:1521/orcl; User Id=xxx; password=xxx;Pooling=false";
            string sql = "select * from T_MD_SCALE";
            try
            {
                using (OracleConnection conn = new OracleConnection(str))
                {
                    conn.Open();
                    if (conn.State == ConnectionState.Open)
                    {
                        OracleDataAdapter da = new OracleDataAdapter(sql, conn);
                        da.Fill(ds, "ds");
                    }
                    //测试
                    Console.ReadKey();
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }

 获得某个表的列名和类型

        static void Main(string[] args)
        {
            DataSet ds = new DataSet();
            string str = @"Data Source=xxx:1521/orcl; User Id=xxx; password=xxx;Pooling=false";
            string sql = "select * from T_MD_SCALE";
            try
            {
                using (OracleConnection conn = new OracleConnection(str))
                {
                    conn.Open();
                    if (conn.State == ConnectionState.Open)
                    {
                        OracleCommand cmd = new OracleCommand(sql, conn);
                        OracleDataReader reader = cmd.ExecuteReader();
                        for (int i = 0; i < reader.FieldCount; i++)
                        {
                            //
                            Console.WriteLine("列名是："+reader.GetName(i));
                            Console.WriteLine("该列类型：" + reader.GetFieldType(i));
                            Console.WriteLine("-----------------------------");
                        }
                    }
                  //测试
                    Console.ReadKey();
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

 获取表的架构

        static void Main(string[] args)
        {
            DataSet ds = new DataSet();
            string str = @"Data Source=192.166.208.52:1521/orcl; User Id=IMES_PMS1; password=pms1;Pooling=false";
            string sql = "select * from T_MD_SCALE";
            try
            {
                using (OracleConnection conn = new OracleConnection(str))
                {
                    conn.Open();
                    if (conn.State == ConnectionState.Open)
                    {
                        OracleCommand cmd = new OracleCommand(sql, conn);
                        OracleDataReader reader = cmd.ExecuteReader();
                        //架构
                        DataTable dt = reader.GetSchemaTable();
                    }
                  //测试
                    Console.ReadKey();
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

 

配合上查询数据库的所有表名

select * from tab

 

 

就可以自定义生成model和dal了