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C#´¦Àíoracle lobµÄÀý×Ó

  protected void BindData1()
    {
        OracleConnection orcn = new OracleConnection("User ID=wesoftwcp; Password=wesoft; Data Source=oradb");
        orcn.Open();
        string MyData = "";
        StreamReader rs = new StreamReader(@"c:\1.txt");
        MyData = rs.ReadToEnd();
        rs.Close();
        //OracleConnection orcn = new OracleConnection("User ID=wesoftwcp; Password=wesoft; Data Source=oradb");
        //orcn.Open();
        OracleType lobtype = OracleType.Clob; //Èç¹ûÊÇblobÕâÀï¸Ä³ÉOracleType.blob
        string CreateTempBlob = "DECLARE A " + lobtype + "; " +
            "BEGIN " +
            "DBMS_LOB.CREATETEMPORARY(A, FALSE); " +
            ":LOC := A; " +
            "END;";
        OracleTransaction transaction = orcn.BeginTransaction();
        OracleParameter[] param = new OracleParameter[1];
        param[0] = new OracleParameter("LOC", OracleType.Clob);
        //OracleHelper.CacheParameter(CreateTempBlob,param);
        OracleCommand cmdTemp = new OracleCommand(CreateTempBlob, orcn);
        param[0].Direction = ParameterDirection.Output;
        //OracleHelper.ExecuteNonQuery(transaction


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