C#•2y ago

❔ Registering a class with string parameter for DI.

This I have a class MongoRepository which accepts a MongoDB database and collection name in the constructor parameters. How do I fix this file?

c#

using System;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Configuration;
using MongoDB.Bson;
using MongoDB.Bson.Serialization;
using MongoDB.Bson.Serialization.Serializers;
using MongoDB.Driver;
using Play.Catalog.Service.Entities;
using Play.Catalog.Service.Settings;

namespace Play.Catalog.Service.Repositories
{
    public static class Extensions
    {
        public static IServiceCollection AddMongo(this IServiceCollection services)
        {
            BsonSerializer.RegisterSerializer(new GuidSerializer(BsonType.String));
            BsonSerializer.RegisterSerializer(new DateTimeOffsetSerializer(BsonType.String));

            services.AddSingleton(provider =>
            {
                var configuration = provider.GetRequiredService<IConfiguration>();
                // This configuration compiles to be null.
                var mongoDbSettings = configuration.GetSection(nameof(MongoDbSettings)).Get<MongoDbSettings>();
                var mongoClient = new MongoClient(mongoDbSettings.ConnectionString);
                return mongoClient.GetDatabase("service");
            });
            return services;
        }
    }
}

c#

using System;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Configuration;
using MongoDB.Bson;
using MongoDB.Bson.Serialization;
using MongoDB.Bson.Serialization.Serializers;
using MongoDB.Driver;
using Play.Catalog.Service.Entities;
using Play.Catalog.Service.Settings;

namespace Play.Catalog.Service.Repositories
{
    public static class Extensions
    {
        public static IServiceCollection AddMongo(this IServiceCollection services)
        {
            BsonSerializer.RegisterSerializer(new GuidSerializer(BsonType.String));
            BsonSerializer.RegisterSerializer(new DateTimeOffsetSerializer(BsonType.String));

            services.AddSingleton(provider =>
            {
                var configuration = provider.GetRequiredService<IConfiguration>();
                // This configuration compiles to be null.
                var mongoDbSettings = configuration.GetSection(nameof(MongoDbSettings)).Get<MongoDbSettings>();
                var mongoClient = new MongoClient(mongoDbSettings.ConnectionString);
                return mongoClient.GetDatabase("service");
            });
            return services;
        }
    }
}

I am using this file in the Program.cs as

builder.Services.AddMongo();

builder.Services.AddMongo();

5 Replies

shivam51OP•2y ago

shivam51OP•2y ago

The mongoDbSettings is coming null. My Program.cs part

builder.Services.AddRazorPages()
    .AddRazorRuntimeCompilation();

// Add services to the container.

builder.Services.Configure<MongoDbSettings>( builder.Configuration.GetSection("MongoDb"));

builder.Services.AddRazorPages()
    .AddRazorRuntimeCompilation();

// Add services to the container.

builder.Services.Configure<MongoDbSettings>( builder.Configuration.GetSection("MongoDb"));

yes Aah, this was the issue. This was the correct line

                var mongoDbSettings = configuration.GetSection("MongoDb").Get<MongoDbSettings>();

Can you explain what you mean by this? I am an absolute noob

shivam51OP•2y ago

You mean like this?

shivam51OP•2y ago

"No service for type 'Play.Catalog.Service.Entities.MongoDbSettings' has been registered. I am configuring the MongoDbSettings here. but I get this error 😦 Works like charm! Thanks @Retax! Can you refer some material for DI and stuff related to this issue? would appreciate it.

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Registering a class with string parameter for DI.