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Program.cs
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Program.cs
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// Copyright(c) 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
using CommandLine;
using Google.Cloud.Firestore;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Threading;
using System.Linq;
namespace GoogleCloudSamples
{
public class OrderLimitData
{
public static string Usage = @"Usage:
C:\> dotnet run command YOUR_PROJECT_ID
Where command is one of
order-by-name-limit-query
order-by-name-desc-limit-query
order-by-state-and-population-query
where-order-by-limit-query
range-order-by-query
invalid-range-order-by-query
";
private static async Task OrderByNameLimitQuery(string project)
{
FirestoreDb db = FirestoreDb.Create(project);
CollectionReference citiesRef = db.Collection("cities");
// [START firestore_query_order_limit]
Query query = citiesRef.OrderBy("Name").Limit(3);
// [END firestore_query_order_limit]
QuerySnapshot querySnapshot = await query.GetSnapshotAsync();
foreach (DocumentSnapshot documentSnapshot in querySnapshot.Documents)
{
Console.WriteLine("Document {0} returned by order by name with limit query", documentSnapshot.Id);
}
}
private static async Task OrderByNameDescLimitQuery(string project)
{
FirestoreDb db = FirestoreDb.Create(project);
CollectionReference citiesRef = db.Collection("cities");
// [START firestore_query_order_desc_limit]
Query query = citiesRef.OrderByDescending("Name").Limit(3);
// [END firestore_query_order_desc_limit]
QuerySnapshot querySnapshot = await query.GetSnapshotAsync();
foreach (DocumentSnapshot documentSnapshot in querySnapshot.Documents)
{
Console.WriteLine("Document {0} returned by order by name descending with limit query", documentSnapshot.Id);
}
}
private static async Task OrderByStateAndPopulationQuery(string project)
{
FirestoreDb db = FirestoreDb.Create(project);
CollectionReference citiesRef = db.Collection("cities");
// [START firestore_query_order_multi]
Query query = citiesRef.OrderBy("State").OrderByDescending("Population");
// [END firestore_query_order_multi]
QuerySnapshot querySnapshot = await query.GetSnapshotAsync();
foreach (DocumentSnapshot documentSnapshot in querySnapshot.Documents)
{
Console.WriteLine("Document {0} returned by order by state and descending population query", documentSnapshot.Id);
}
}
private static async Task WhereOrderByLimitQuery(string project)
{
FirestoreDb db = FirestoreDb.Create(project);
CollectionReference citiesRef = db.Collection("cities");
// [START firestore_query_order_limit_field_valid]
Query query = citiesRef
.WhereGreaterThan("Population", 2500000)
.OrderBy("Population")
.Limit(2);
// [END firestore_query_order_limit_field_valid]
QuerySnapshot querySnapshot = await query.GetSnapshotAsync();
foreach (DocumentSnapshot documentSnapshot in querySnapshot.Documents)
{
Console.WriteLine("Document {0} returned by where order by limit query", documentSnapshot.Id);
}
}
private static async Task RangeOrderByQuery(string project)
{
FirestoreDb db = FirestoreDb.Create(project);
CollectionReference citiesRef = db.Collection("cities");
// [START firestore_query_order_with_filter]
Query query = citiesRef
.WhereGreaterThan("Population", 2500000)
.OrderBy("Population");
// [END firestore_query_order_with_filter]
QuerySnapshot querySnapshot = await query.GetSnapshotAsync();
foreach (DocumentSnapshot documentSnapshot in querySnapshot.Documents)
{
Console.WriteLine("Document {0} returned by range with order by query", documentSnapshot.Id);
}
}
private static void InvalidRangeOrderByQuery(string project)
{
FirestoreDb db = FirestoreDb.Create(project);
CollectionReference citiesRef = db.Collection("cities");
// [START firestore_query_order_field_invalid]
Query query = citiesRef
.WhereGreaterThan("Population", 2500000)
.OrderBy("Country");
// [END firestore_query_order_field_invalid]
}
public static void Main(string[] args)
{
if (args.Length < 2)
{
Console.Write(Usage);
return;
}
string command = args[0].ToLower();
string project = string.Join(" ",
new ArraySegment<string>(args, 1, args.Length - 1));
switch (command)
{
case "order-by-name-limit-query":
OrderByNameLimitQuery(project).Wait();
break;
case "order-by-name-desc-limit-query":
OrderByNameDescLimitQuery(project).Wait();
break;
case "order-by-state-and-population-query":
OrderByStateAndPopulationQuery(project).Wait();
break;
case "where-order-by-limit-query":
WhereOrderByLimitQuery(project).Wait();
break;
case "range-order-by-query":
RangeOrderByQuery(project).Wait();
break;
case "invalid-range-order-by-query":
InvalidRangeOrderByQuery(project);
break;
default:
Console.Write(Usage);
return;
}
}
}
}