APP.dicon
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE components PUBLIC "-//SEASAR2.1//DTD S2Container//EN" "http://www.seasar.org/dtd/components21.dtd">
<components namespace="App">
  <!-- S2Dao.NETでOracleに接続 -->
  <include path="App_Code/OracleEx.dicon" />
  <include path="App_Code/Dao/Test/TestSelect.dicon"/>
</components>

TestSelect.dicon
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE components PUBLIC "-//SEASAR2.1//DTD S2Container//EN" "http://www.seasar.org/dtd/components21.dtd">
<components namespace="TestSelect">
  <!-- S2Dao.NETでOracleに接続 -->
  <include path="App_Code/OracleEx.dicon" />
  <component class="TestSelectDao" name="TestSelectDao">
    <aspect>OracleEx.DaoInterceptor</aspect>
  </component>
</components>

OracleEx.dicon
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE components PUBLIC "-//SEASAR2.1//DTD S2Container//EN"
"http://www.seasar.org/dtd/components21.dtd">
<components namespace="OracleEx">
  <!-- データプロバイダ -->
  <component name="Oracle" class="Seasar.Extension.ADO.DataProvider">
    <property name="ConnectionType">"System.Data.OracleClient.OracleConnection"</property>
    <property name="CommandType">"System.Data.OracleClient.OracleCommand"</property>
    <property name="ParameterType">"System.Data.OracleClient.OracleParameter"</property>
    <property name="DataAdapterType">"System.Data.OracleClient.OracleDataAdapter"</property>
  </component>
  <!-- データソース -->
  <component name="SqlDataSource" class="Seasar.Extension.Tx.Impl.TxDataSource">
    <property name="DataProvider">Oracle</property>
    <!-- 接続文字列は構成ファイルから取得 -->
    <property name="ConnectionString"> appSettings['ConnectionString']</property>
  </component>
  <!-- S2Dao.NETのDaoInterceptorとそれに必要なコンポーネント -->
  <component class="Seasar.Extension.ADO.Impl.BasicDataReaderFactory" />
  <component class="Seasar.Extension.ADO.Impl.BasicCommandFactory" />
  <component class="Seasar.Dao.Impl.DaoMetaDataFactoryImpl" />
  <component class="Seasar.Dao.Impl.FieldAnnotationReaderFactory" />
  <component name="DaoInterceptor" class="Seasar.Dao.Interceptors.S2DaoInterceptor"/>
  <!-- ローカルトランザクション用のインターセプター -->
  <component name="LocalRequiredTx" class="Seasar.Extension.Tx.TransactionInterceptor">
    <arg>
      <component class="Seasar.Extension.Tx.Impl.LocalRequiredTxHandler" />
    </arg>
    <property name="TransactionStateHandler">TransactionContext</property>
  </component>
  <!-- ローカルトランザクション用のインターセプターで使用します -->
  <component name="TransactionContext" class="Seasar.Extension.Tx.Impl.TransactionContext">
    <property name="IsolationLevel">System.Data.IsolationLevel.ReadCommitted</property>
  </component>
  <!-- MSDTC（分散トランザクション）用のインターセプター -->
  <component name="RequiredTx" class="Seasar.Extension.Tx.TransactionInterceptor">
    <arg>
      <component class="Seasar.Extension.Tx.Impl.DTCRequiredTxHandler" />
    </arg>
    <property name="TransactionStateHandler">DTCTransactionStateHandler</property>
  </component>
  <!-- MSDTC用のインターセプターで使用します -->
  <component name="DTCTransactionStateHandler" class="Seasar.Extension.Tx.Impl.DTCTransactionStateHandler" />
</components>

TestSelectDao.cs
[Bean(typeof(TestSelect))]
public interface TestSelectDao {
  //[Sql("SELECT * FROM T_INPUT_DAT")]
  TestSelect[] SelectList();
}

TestSelect.cs
[Table("T_INPUT_DAT")]
public class TestSelect {
  private String ymd;
  private String itemcd;
  private int    seqno;
  private byte[] inpdat;
  [Column("YYYYMM")]
  public String Ymd {
    get {return ymd;}
    set {ymd = value;}
  }
  [Column("ITEM_CD")]
  public String ItemCd {
    get {return itemcd;}
    set {itemcd = value;}
  }
  [Column("SEQ_NO")]
  public int SeqNo {
    get {return seqno;}
    set {seqno = value;}
  }
  [Column("INP_DAT")]
  public byte[] InpDat {
    get {return inpdat;}
    set {inpdat = value;}
  }
}

ボタンのクリックイベント
IS2Container container = S2ContainerFactory.Create(SingletonS2ContainerFactory.ConfigPath);
TestSelectDao GrDao = (TestSelectDao)container.GetComponent(typeof(TestSelectDao));
TestSelect[] dat = GrDao.SelectList();

SQLスクリプト
create table T_INPUT_DAT
(
  YYYYMM  VARCHAR2(6) not null,
  ITEM_CD VARCHAR2(6) not null,
  SEQ_NO  NUMBER(10) not null,
  INP_DAT SYS.XMLTYPE
)