.NET HttpClient。如何POST字符串值?

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.NET HttpClient。如何POST字符串值?

如何使用C#和HttpClient创建以下POST请求:

\"User-Agent:

我需要这样的请求来使用我的WEB API服务:

[ActionName("exist")]
[HttpPost]
public bool CheckIfUserExist([FromBody] string login)
{           
    return _membershipProvider.CheckIfExist(login);
}

admin 更改状态以发布 2023年5月22日
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下面是同步调用的示例,但您可以通过使用 await-sync 轻松更改为异步调用: \n\n

var pairs = new List>
            {
                new KeyValuePair("login", "abc")
            };
var content = new FormUrlEncodedContent(pairs);
var client = new HttpClient {BaseAddress = new Uri("http://localhost:6740")};
    // call sync
var response = client.PostAsync("/api/membership/exist", content).Result; 
if (response.IsSuccessStatusCode)
{
}

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using System;
using System.Collections.Generic;
using System.Net.Http;
class Program
{
    static void Main(string[] args)
    {
        Task.Run(() => MainAsync());
        Console.ReadLine();
    }
    static async Task MainAsync()
    {
        using (var client = new HttpClient())
        {
            client.BaseAddress = new Uri("http://localhost:6740");
            var content = new FormUrlEncodedContent(new[]
            {
                new KeyValuePair("", "login")
            });
            var result = await client.PostAsync("/api/Membership/exists", content);
            string resultContent = await result.Content.ReadAsStringAsync();
            Console.WriteLine(resultContent);
        }
    }
}

的中文意思是:加粗的数字123。

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