SortByAggregateExamples.cs

using NRedisStack.RedisStackCommands;
using NRedisStack.Search;
using NRedisStack.Search.Aggregation;
using StackExchange.Redis;

var muxer = ConnectionMultiplexer.Connect("localhost");
var db = muxer.GetDatabase();

string[] strings = new string[100];
for (int i = 0; i < 100; i++)
{
    if (i % 2 == 0)
    {
        strings[i] = new string((char)('A' + (i % 26)), (i / 26) + 1);
    }
    else
    {
        strings[i] = new string((char)('a' + (i % 26)), (i / 26) + 1);
    }
    
}

// Sort the array in a case-sensitive manner
Array.Sort(strings, StringComparer.Ordinal);


var ft = db.FT();
var indexName = "test-idx";
try
{
    ft.DropIndex(indexName, true);
}
catch (Exception ex)
{
    //ignore
}

Schema schema = new Schema();
schema.AddTextField("name", sortable: true, unf: true);
// schema.AddTextField("name", sortable: true);
FTCreateParams parameters = new FTCreateParams();
parameters.Prefix("test:");
ft.Create(indexName, parameters, schema);

var insertTasks = new List<Task>();
for (int i = 0; i < 100; i++)
{
    insertTasks.Add(db.HashSetAsync($"test:{i}", "name", strings[i]));
}

await Task.WhenAll(insertTasks);

SortedField sortField = new SortedField("@name");
for (var i = 0; i < 10; i++)
{
    AggregationRequest request = new AggregationRequest();
    
    // request.LoadAll();
    request.SortBy(sortField);
    request.Limit(i * 10, 10);

    var result = ft.Aggregate(indexName, request);
    foreach (var res in result.GetResults())
    {
        Console.WriteLine(res["name"]);
    }
}