public string GenerateExamePaper(string paperType, string driverID, string MacAddr)
{
  int i;
  IDataParameter[] iData = new SqlParameter[4];
  iData[0] = new SqlParameter(\"@paperType\", paperType);
  iData[1] = new SqlParameter(\"@driverID\", driverID);
  iData[2] = new SqlParameter(\"@MacAddr\", MacAddr);
  iData[3] = new SqlParameter(\"@sReturn\", SqlDbType.Char, 50, ParameterDirection.Output, false, 0, 0, string.Empty, DataRowVersion.Default,null);
  string aaa = \"\";
  i= DbHelperSQL.RunProcedureParOut(\"Pro_GenerateExamePaper\", iData, out aaa).ToString();

  return aaa;
}

/// <summary>
/// 执行存储过程，返回影响的行数 
/// </summary>
/// <param name=\"storedProcName\">存储过程名</param>
/// <param name=\"parameters\">存储过程参数</param>
/// <param name=\"rowsAffected\">影响的行数</param>

/// <param name=\"rowsAffected\">返回output值</param>

/// <returns></returns>
public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected,out str)
{
  using (SqlConnection connection = new SqlConnection(connectionString))
  {
 int result;
 connection.Open();
 SqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
 rowsAffected = command.ExecuteNonQuery();
 result = (int)command.Parameters[\"ReturnValue\"].Value;
    str= (int)command.Parameters[\"@sReturn\"].Value;
 return result;
  }
}