如何在 C# 中从 Firestore 中检索字典

Question

我正在尝试检索数据，他的类型是映射到 c# 中的组合框，但我失败了，我需要帮助 这是我的尝试

 async void GetSection()
    {
        DocumentReference docRef = database.Collection("Class").Document(combClasses.SelectedItem.ToString());
        DocumentSnapshot snapshot = await docRef.GetSnapshotAsync();
        if (snapshot.Exists)
        {
            //MessageBox.Show("Document data for {0} document:", snapshot.Id);
            Dictionary<string, object> city = snapshot.ToDictionary();
            foreach (KeyValuePair<string, object> pair in city)
            {
                if (pair.Key.Equals("Section"))
                {
                  
                }
            }
        }
        else
        {
            Console.WriteLine("Document {0} does not exist!", snapshot.Id);
        }           
    }

my firestore data

Answer 1

 DocumentReference doc = database.Collection("Class").Document(combClasses.SelectedItem.ToString());
        DocumentSnapshot snap = await doc.GetSnapshotAsync();
        if (snap.Exists)
        {
            Dictionary<string, object> data = new Dictionary<string, object>();
            foreach (var item in snap.ToDictionary())
            {
                if (item.Key == "Section")
                {
                    foreach (var sec in (Dictionary<string, object>)item.Value)
                    {
                        data.Add(sec.Key, sec.Value);
                        
                            string ss = (sec.Key.ToString() + " # of student ( " + Convert.ToString(sec.Value.ToString()) + " )");
                            combSection.Items.Add(ss);                                                       
                    }
                }
            }
        }