本文主要是介绍如何用HttpClient请求带参数的服务，请求服务为某翻译API

直接上源码

1.添加using System.Net;的引用

using System.Net;

2.使用HttpClient发送请求

public static async void Fanyin_HttpClient(string fromString)
{Console.WriteLine($"Fanyin_HttpClient post");System.Net.Http.HttpClient httpClient = new System.Net.Http.HttpClient();string randnum = Random.Shared.Next(100).ToString();string sign = Encrypt.EncryptString(ApiConfig.ApiId + fromString + randnum + ApiConfig.ApiKey);var response = await httpClient.PostAsync(ApiConfig.Url, new FormUrlEncodedContent(new Dictionary<string, string>() {{ "q",fromString},{ "from",Language.中文简体},{ "to",Language.英语},{ "appid",ApiConfig.ApiId},{ "salt",randnum},{ "sign",sign}}));Console.WriteLine(await response.Content.ReadAsStringAsync());
}

3.输出