插入收集到列表與嵌套數組

Question

我有這個集合

db.UserWatchtbl.insert({ 
fbId: "", 
Name: "user1", 
pass: "pass1", 
Watchtbl: 
    [ 
     { 
     wid: "1350", 
     name: "bought stock1", 
     Symboles: [ { Name: "AAA" }, { Name: "BSI" } ] 
     }, 
     { 
     wid: "1350", 
     name: "bought stock2", 
     Symboles: [ { Name: "AAA" }, { Name: "BSI" }, { Name: "EXXI" } ] 
     } 
    ] 
}) 

我試着將它插入到在C＃中的清單，但我有一個嵌套數組watchtbl和symboles。我不知道它是如何工作來獲取元素到列表或顯示它 我試試這個代碼

private async void Master_BindData() 
    { 
     // add user into datagridview from MongoDB Colelction Watchtbl 
     var client = new MongoClient("mongodb://servername:27017"); 

     var database = client.GetDatabase("WatchTblDB"); 
     var collectionWatchtbl = database.GetCollection<BsonDocument>("UserWatchtbl"); 

     var filter = new BsonDocument(); 
     using (var cursor = await collectionWatchtbl.FindAsync(filter)) 
     { 
      while (await cursor.MoveNextAsync()) 
      { 
       var batch = cursor.Current; 
       foreach (var document in batch) 
       { 

        user.Add(new UserWatchTblCls() 
        { 
         Id = ObjectId.Parse(document["_id"].ToString()), 
         Name = document["Name"].ToString() 
         //WatchTbls = document["Watchtbl"].AsBsonArray; 
        }); 
       } 
      } 
     } 
    } 

以及類UserWatchTblCls（）

public class UserWatchTblCls 
    { 
     [BsonId] 
     public ObjectId Id { get; set; } 
     public string fbId { get; set; } 
     public string Name { get; set; } 
     public string Pass { get; set; } 
     public List<WatchTblCls> WatchTbls { get; set; } 
    } 

    public class WatchTblCls 
    { 
     public string WID { get; set; } 
     public string Name { get; set; } 
     public List<SymboleCls> Symbols { get; set; } 
    } 

    public class SymboleCls 
    { 
     public string Name { get; set; } 
    } 

Answer 1

你必須通過迭代Result的FindAsync。這將收集的數據轉換成用戶（List<UserWatchTblCls>）

var user = new List<UserWatchTblCls>(); 

var cursor = collectionWatchtbl.FindAsync(filter).Result; 
cursor.ForEachAsync(batch => 
{ 
    user.Add(new UserWatchTblCls() 
    { 
     Id = ObjectId.Parse(batch["_id"].ToString()), 
     Name = batch["Name"].ToString() 
    }); 
}); 

EDIT

喔。所以你也在尋找深度的反序列化。

public ReadFromDB() 
{ 
    var client = new MongoClient("mongodb://localhost:27017"); 

    var database = client.GetDatabase("test"); 
    var collectionWatchtbl = database.GetCollection<BsonDocument>("UserWatchtbl"); 

    var filter = new BsonDocument(); 
    var user = new List<UserWatchTblCls>(); 
    var cursor = collectionWatchtbl.FindAsync(filter).Result; 
    cursor.ForEachAsync(batch => 
    { 
     user.Add(BsonSerializer.Deserialize<UserWatchTblCls>(batch)); 
    }); 
} 

public class UserWatchTblCls 
{ 
    [BsonId] 
    [BsonElement("_id")] 
    public ObjectId Id { get; set; } 
    public string fbId { get; set; } 
    public string Name { get; set; } 
    [BsonElement("pass")] 
    public string Pass { get; set; } 
    [BsonElement("Watchtbl")] 
    public List<WatchTblCls> WatchTbls { get; set; } 
} 

public class WatchTblCls 
{ 
    [BsonElement("wid")] 
    public string WID { get; set; } 
    [BsonElement("name")] 
    public string Name { get; set; } 
    [BsonElement("Symboles")] 
    public List<SymboleCls> Symbols { get; set; } 
} 

public class SymboleCls 
{ 
    public string Name { get; set; } 
}