。net httpclient的工具类

下面是一个简单的 .NET HttpClient 工具类的示例：

using System;
using System.Net.Http;
using System.Threading.Tasks;

public class HttpClientHelper
{
    private readonly HttpClient _httpClient;

    public HttpClientHelper(HttpClient httpClient)
    {
        _httpClient = httpClient;
    }

    public async Task<string> GetAsync(string url)
    {
        HttpResponseMessage response = await _httpClient.GetAsync(url);
        response.EnsureSuccessStatusCode();
        string responseBody = await response.Content.ReadAsStringAsync();
        return responseBody;
    }

    public async Task<string> PostAsync(string url, HttpContent content)
    {
        HttpResponseMessage response = await _httpClient.PostAsync(url, content);
        response.EnsureSuccessStatusCode();
        string responseBody = await response.Content.ReadAsStringAsync();
        return responseBody;
    }
}

使用示例：

using System;
using System.Net.Http;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        HttpClient httpClient = new HttpClient();
        HttpClientHelper httpClientHelper = new HttpClientHelper(httpClient);

        string response = await httpClientHelper.GetAsync("https://jsonplaceholder.typicode.com/posts/1");
        Console.WriteLine(response);

        var content = new StringContent("{\"title\":\"foo\",\"body\":\"bar\",\"userId\":1}");
        response = await httpClientHelper.PostAsync("https://jsonplaceholder.typicode.com/posts", content);
        Console.WriteLine(response);
    }
}

以上示例演示了如何使用 HttpClient 发送 GET 和 POST 请求并处理响应。注意，在实际应用程序中，您可能需要添加更多的错误处理和日志记录等功能。