C# FireStore，从文档中获取值

Question

I'm trying to get the values inside of a document in FireStore, so I did this.

Task<QuerySnapshot> docRef = db.Collection("Logs").GetSnapshotAsync();
foreach (DocumentSnapshot doc in await docRef){
   DocumentSnapshot log = await db.Collection("Logs").Document(doc.Id).GetSnapshotAsync();
   Console.WriteLine(log); // How to get the data in log?
}

Thing is that I don't know how to get the Data in log. I tried log["infoLog"]["name"] but it doesn't work.

As you can see, the data contains a Map (infoLog) and inside of that, different strings, integers etc..

What would be the right way? Thanks!

Updated

Tried this

        Task<QuerySnapshot> docRef = db.Collection("Logs").GetSnapshotAsync();
            foreach (DocumentSnapshot doc in await docRef)
            {
                DocumentSnapshot log = await db.Collection("Logs").Document(doc.Id).GetSnapshotAsync();

                foreach (KeyValuePair<string, object> pair in log.ToDictionary())
                {
                    Console.WriteLine("{0}: {1}", pair.Key, pair.Value);

                }
            }

But the data didn't come in order. (Because asynchronous I assume)

Answer 1

You can get the documents already ordered from the Firestore side by using the .OrderBy("FIELD_NAME") or OrderByDescending("FIELD_NAME") functions when querying for the data as mentioned in the official documentation . This way you will get them already ordered so you won't need to order them in client side.

Task<QuerySnapshot> docRef = db.Collection("Logs").OrderBy("FIELD_NAME").GetSnapshotAsync();
    foreach (DocumentSnapshot doc in await docRef)
    {
        DocumentSnapshot log = await db.Collection("Logs").Document(doc.Id).GetSnapshotAsync();
        foreach (KeyValuePair<string, object> pair in log.ToDictionary())
        {
            Console.WriteLine("{0}: {1}", pair.Key, pair.Value);
        }
    }

Just need to replace FIELD_NAME with the name of the field you want to order by. In case you want to order by more than one field it can be done as well just by using OrderBy() multiple times.