[英]How to add CosmosDB to .Net 6 WebAPI?
我想在 .Net 6 WebAPI 中使用 CosmosDB SQL-API。 是否还有一个 AddCosmos() 方法可用于在不同的服务中注入客户端,或者是否真的有必要使用接口来实现我自己的 cosmos-service 以将客户端注入我自己的服务类?
using Microsoft.Azure.Cosmos;
using Microsoft.OpenApi.Models;
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddControllers();
builder.Services.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1", new() { Title = "WebApplication1", Version = "v1" });
});
builder.Services.AddHttpClient();
builder.Services.AddSingleton<CosmosClient>(serviceProvider =>
{
IHttpClientFactory httpClientFactory = serviceProvider.GetRequiredService<IHttpClientFactory>();
CosmosClientOptions cosmosClientOptions = new CosmosClientOptions
{
HttpClientFactory = httpClientFactory.CreateClient,
ConnectionMode = ConnectionMode.Gateway
};
return new CosmosClient("<cosmosdb_connectionstring>");
// sample code
//return new CosmosClient("AccountEndpoint=https://localhost:8081/;AccountKey=C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==", cosmosClientOptions);
});
var app = builder.Build();
// Configure the HTTP request pipeline.
if (builder.Environment.IsDevelopment())
{
app.UseDeveloperExceptionPage();
app.UseSwagger();
app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "WebApplication1 v1"));
}
app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();
app.Run();
然后你可以将CosmosClient
注入你的控制器。
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.Cosmos;
using Microsoft.WindowsAzure.Storage.Table;
namespace WebApplication1.Controllers;
[ApiController]
[Route("[controller]")]
public class HomeController : ControllerBase
{
public CosmosClient _client;
private readonly ILogger<WeatherForecastController> _logger;
public HomeController(ILogger<WeatherForecastController> logger, CosmosClient client)
{
_logger = logger;
_client = client;
}
[HttpGet]
public async Task<string> getvalue() {
string dbname = "test";
string containername = "container1";
Database database = await _client.CreateDatabaseIfNotExistsAsync(dbname);
Container container = database.GetContainer(containername);
var query = container.GetItemQueryIterator<Test>("SELECT c.id FROM c");
string ss = string.Empty;
while (query.HasMoreResults)
{
FeedResponse<Test> result = await query.ReadNextAsync();
foreach (var item in result) {
ss += item.id;
}
}
return ss;
}
public class Test : TableEntity {
public int id { get; set; }
}
}
在我的 cosmosdb 中的价值。
通过 api 获取价值
这就是我所做的。
程序.cs
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
//Start adding Congiguration for cosmos db
static async Task<CosmosDbService> InitializeCosmosClientInstanceAsync(IConfigurationSection configurationSection)
{
var databaseName = configurationSection["DatabaseName"];
var containerName = configurationSection["ContainerName"];
var account = configurationSection["Account"];
var key = configurationSection["Key"];
var client = new Microsoft.Azure.Cosmos.CosmosClient(account, key);
var database = await client.CreateDatabaseIfNotExistsAsync(databaseName);
await database.Database.CreateContainerIfNotExistsAsync(containerName, "/id");
var cosmosDbService = new CosmosDbService(client, databaseName, containerName);
return cosmosDbService;
}
var section = builder.Configuration.GetSection("CosmosDb");
builder.Services.AddSingleton<ICosmosDbService>(
InitializeCosmosClientInstanceAsync(section).GetAwaiter().GetResult());
//end
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