.net oracle 游标返回结果集

CREATE OR REPLACE PROCEDURE BJ_PROC(cur_OUT          OUT TEST_PKG.T_CURSOR,
                                    V_COUNT        OUT INTEGER,
                                    V_FIELDS       VARCHAR2,
                                    V_CONDITIONSTR VARCHAR2,
                                    V_TABLE        VARCHAR2) AS
  v_Statement varchar2(4000);
  v_INTERNALFIELDS VARCHAR2(4000);
BEGIN
  V_COUNT:=0;
  SELECT DECODE(V_FIELDS,NULL,'*',V_FIELDS) INTO v_INTERNALFIELDS FROM DUAL;
  IF LENGTH(TRIM(v_INTERNALFIELDS))=0 THEN
   v_INTERNALFIELDS:='*';
  END IF;  IF LENGTH(TRIM(V_CONDITIONSTR))=0 THEN
    v_Statement := 'SELECT ' || v_INTERNALFIELDS ||' FROM ' || V_TABLE;
  ELSE
    v_Statement := 'SELECT ' || v_INTERNALFIELDS ||' FROM ' || V_TABLE ||
                   ' WHERE ' || V_CONDITIONSTR;
  END IF;
  open cur_OUT for v_Statement;
  EXCEPTION
   WHEN OTHERS THEN
    Raise_application_error(-20374, '语法错误');
    V_COUNT:=-1;
END BJ_PROC;
.net 调用Oracle游标：
       public static DataTable BJ_PROC(string V_FIELDS, string V_CONDITIONSTR, string V_TABLE)
        {
            OleDbParameter[] Param = new OleDbParameter[5]
                
                { 
                  new OleDbParameter("@cur_OUT",10),
                  new OleDbParameter("@V_COUNT",OleDbType.Single,100),
                  new OleDbParameter("@V_FIELDS",OleDbType.VarChar),
                  new OleDbParameter("@V_CONDITIONSTR",OleDbType.VarChar),
                  new OleDbParameter("@V_TABLE",OleDbType.VarChar)
                };            Param[0].Direction = ParameterDirection.ReturnValue;            Param[1].Direction = ParameterDirection.ReturnValue;            Param[2].Value = V_FIELDS;
            Param[2].Direction = ParameterDirection.Input;            Param[3].Value = V_CONDITIONSTR;
            Param[3].Direction = ParameterDirection.Input;            Param[4].Value = V_TABLE;
            Param[4].Direction = ParameterDirection.Input;            DataTable s_value = DBHelper.GetDataSet("BJ_PROC", Param);            return s_value;
        
        } 
public static DataTable GetDataSet(string proc_name,params OleDbParameter[] values)
        {
            DataSet ds = new DataSet();
            OleDbCommand cmd = new OleDbCommand(proc_name, Con);
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddRange(values);
            OleDbDataAdapter da = new OleDbDataAdapter(cmd);
            da.Fill(ds);
            con.Close();
            con.Dispose();
            return ds.Tables[0];                   }出现错误如下：
ORA-06550: 第 1 行, 第 18 列: 
PLS-00306: 调用 'BJ_PROC' 时参数个数或类型错误
ORA-06550: 第 1 行, 第 7 列: 
PL/SQL: Statement ignored请问如何解决？