从c＃中的fileStream中进行多个对象

Question

我无法从文件流中进行多个json对象；我得到一个序列化exception。

我可以用一个对象做到这一点，但不能与多个对象一起做。我正在从.txt文件中尝试使用：

csharks imi 1991
csharks romeo 1989
csharks peti 1989
csharks berti 1991
csharks bala 1993

json：

  [
   {
     "Name": "imi",
     "TeamName": "csharks"
   },
   {
     "Name": "romeo",
     "TeamName": "csharks"
   },
   {
     "Name": "peti",
     "TeamName": "csharks"
   },
   {
     "Name": "berti",
     "TeamName": "csharks"
   },
   {
     "Name": "bala",
     "TeamName": "csharks"
   }
 ]

c＃代码：

public class Program
{
    private static List<TeamMember> teamMembers = new List<TeamMember>();
    private static List<TeamMember> teamMembersDeserialized = new List<TeamMember>();
    public static void Main(string[] args)
    {
        string teamFile = @"C:UsersPrecisionDownloadsSerializaciocsharks.txt";
        string teamFileJson = @"C:UsersPrecisionDownloadsSerializaciocsharksJSON.json";
        string teamFileJson2 = @"C:UsersPrecisionDownloadsSerializaciocsharksJSON2.json";
        using (FileStream fs = new FileStream(teamFile, FileMode.Open, FileAccess.Read))
        {
            using (StreamReader reader = new StreamReader(fs))
            {
                List<string> memberData = new List<string>();
                while (true)
                {
                    string line = reader.ReadLine();
                    if (line == null)
                    {
                        break;
                    }
                    memberData = line.Split(' ').ToList();
                    TeamMember member = new TeamMember(memberData[0], memberData[1], int.Parse(memberData[2]));
                    teamMembers.Add(member);
                }
            }
        }
        using (FileStream fs = new FileStream(teamFileJson, FileMode.OpenOrCreate, FileAccess.Write))
        {
            foreach (TeamMember member in teamMembers)
            {
                Console.WriteLine(member.ToString());
                DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(member.GetType());
                jsonSerializer.WriteObject(fs, member);

            }
        }
        using (FileStream fs2 = File.OpenRead(teamFileJson2))
        {
            foreach (TeamMember member in teamMembers)
            {
                DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(member.GetType());
                {
                    TeamMember memberNew = jsonSerializer.ReadObject(fs2) as TeamMember;
                    teamMembersDeserialized.Add(memberNew);
                }                    
            }
        }
        foreach (TeamMember member in teamMembersDeserialized)
        {
            Console.WriteLine(member.ToString());
        }
        Console.ReadKey();
    }
}

Answer 1

以下示例解析您的JSON。我正在使用newtonsoft.json名称。请让我知道您是否需要其他帮助。

void Main()
{
    var json = @"[
        {
            'Name': 'imi',
            'TeamName': 'csharks'
        },
        {
            'Name': 'romeo',
            'TeamName': 'csharks'
        },
        {
            'Name': 'peti',
            'TeamName': 'csharks'
        },
        {
            'Name': 'berti',
            'TeamName': 'csharks'
        },
        {
            'Name': 'bala',
            'TeamName': 'csharks'
        }]";
    var teams = JsonConvert.DeserializeObject<List<Team>>(json);
    teams.ForEach(x => Console.WriteLine($"Name: {x.Name}, Team: {x.TeamName}"));
}
public class Team
{
    public String Name { get; set; }
    public String TeamName { get; set; }
}

这给出以下输出：

Name: imi, Team: csharks
Name: romeo, Team: csharks
Name: peti, Team: csharks
Name: berti, Team: csharks
Name: bala, Team: csharks

要从文件中读取此JSON，您可以执行以下操作：

var filename = Path.Combine(
    Environment.GetFolderPath(Environment.SpecialFolder.Desktop),
    "test.json");
var json = File.ReadAllText(filename);