使用设置注入 class 的多个实例

Question

我在使用 Azure 存储时遇到了一些问题。我目前有一个很好的实现，但我想扩展它，以便我能够在一个解决方案中使用多个存储 accounts/containers。我无法理解如何做到这一点并且仍然允许依赖注入。我还需要能够传递定义连接字符串和容器名称的设置

这就是我目前的做法：

builder.Services.AddSingleton<IAzureStorageClient, AzureStorageClient>();

builder.Services.Configure<AzureStorageSettings>(configuration.GetSection("AzureStorageSettings"));

然后在构造函数中

public AzureStorageClient(IOptions<AzureStorageSettings> options)
{
    var azureStorageSettings = options.Value;
    var cloudStorageAccount = GetCloudStorageAccount(azureStorageSettings.ConnectionString);

    _blobClient = cloudStorageAccount.CreateCloudBlobClient();
    _blobContainer = GetBlobContainer(azureStorageSettings.ContainerName);
}

我读过很多提到使用命名注册的类似帖子，但我使用的是内置的 IoC 容器，它不允许这样做。我还看到帖子说要使用看起来不错的工厂，但我希望打包这个逻辑并在不同的解决方案之间共享它，而工厂解决方案需要大量配置，我想避免这些配置，以使包装易于使用消费。

更新：我将设置设置为一个接口，以在每次需要时强制执行它，并且我使用通用 T 将其传递到我的存储客户端，如下所示：

public sealed class AzureStorageClient<T> : IAzureStorageClient<T> where T : class, IAzureStorageSettings, new()

public AzureStorageClient(IOptions<T> options) 
{
    var azureStorageSettings = options.Value;
    var cloudStorageAccount = GetCloudStorageAccount(azureStorageSettings.ConnectionString);

    _blobClient = cloudStorageAccount.CreateCloudBlobClient();
    _blobContainer = GetBlobContainer(azureStorageSettings.ContainerName);
}

然后可以这样注入：

builder.Services.AddSingleton<IAzureStorageClient<SpecificStorageSettings>, AzureStorageClient<SpecificStorageSettings>>();

Answer 1

举个例子，你可以这样设置：

Settings.cs

    using System;
    using System.Collections.Generic;
    using System.Text;

    namespace UseDifferentSettings
    {
        public abstract class Settings
        {
            public abstract string connectingstring {
                get;
            }
            public abstract string containername {
                get;
            }
            public abstract string blobname {
                get;
            }
        }
    }

Setting1.cs

 using System;
    using System.Collections.Generic;
    using System.Text;

    namespace UseDifferentSettings
    {
        class Setting1 : Settings
        {
            string _connectingstring = "DefaultEndpointsProtocol=https;AccountName=xxx;EndpointSuffix=core.windows.net";
            string _containername = "video1";
            string _blobname = "test.txt";
            public override string connectingstring
            {
                get { return _connectingstring; }
            }
            public override string containername
            {
                get { return _containername; }
            }
            public override string blobname
            {
                get { return _blobname; }
            }
        }
    }

Setting2.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace UseDifferentSettings
{
    class Setting2 : Settings
    {
        private string _connectingstring = "DefaultEndpointsProtocol=https;AccountName=xxx;EndpointSuffix=core.windows.net";
        private string _containername = "test";
        private string _blobname = "test.txt";
        public override string connectingstring
        {
            get { return _connectingstring; }
        }
        public override string containername
        {
            get { return _containername; }
        }
        public override string blobname
        {
            get { return _blobname; }
        }
    }
}

UploadToStorage.cs

using Azure.Storage.Blobs;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace UseDifferentSettings
{
    public class UploadToStorage
    {
        Settings setting;
        public UploadToStorage(Settings setting) {
            this.setting = setting;
        }
        public void GoUpload() {
            string connectingstring = setting.connectingstring;
            string containername = setting.containername;
            string blobname = setting.blobname;
            string filecontent = "This is my test file content";
            byte[] array = Encoding.ASCII.GetBytes(filecontent);
            MemoryStream filestream = new MemoryStream(array);
            BlobServiceClient blobServiceClient = new BlobServiceClient(connectingstring);
            BlobContainerClient containerClient = blobServiceClient.GetBlobContainerClient(containername);
            BlobClient blobClient = containerClient.GetBlobClient(blobname);
            blobClient.Upload(filestream);
        }
    }
}

Program.cs(主要方法class)

using System;

namespace UseDifferentSettings
{
    class Program
    {
        static void Main(string[] args)
        {
            Settings setting1 = new Setting1();
            Settings setting2 = new Setting2();
            UploadToStorage uploadtostorage = new UploadToStorage(setting1);
            uploadtostorage.GoUpload();
            Console.WriteLine("Hello World!");
        }
    }
}

使用设置注入 class 的多个实例

Injecting multiple instances of a class with settings

c#

dependency-injection

azure-storage