C# .NET HttpClient。如何POST字符串值？
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.NET HttpClient. How to POST string value?
提问by Ievgen Martynov
How can I create using C# and HttpClient the following POST request:
如何使用 C# 和 HttpClient 创建以下 POST 请求：
I need such a request for my WEB API service:
我的 WEB API 服务需要这样的请求：
[ActionName("exist")]
[HttpPost]
public bool CheckIfUserExist([FromBody] string login)
{
return _membershipProvider.CheckIfExist(login);
}
采纳答案by Darin Dimitrov
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<string, string>("", "login")
});
var result = await client.PostAsync("/api/Membership/exists", content);
string resultContent = await result.Content.ReadAsStringAsync();
Console.WriteLine(resultContent);
}
}
}
回答by cuongle
Below is example to call synchronously but you can easily change to async by using await-sync:
下面是同步调用的示例，但您可以使用 await-sync 轻松更改为异步：
var pairs = new List<KeyValuePair<string, string>>
{
new KeyValuePair<string, string>("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)
{
}
回答by Axel
You could do something like this
你可以做这样的事情
HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://localhost:6740/api/Membership/exist");
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = 6;
StreamWriter streamOut = new StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII);
streamOut.Write(strRequest);
streamOut.Close();
StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream());
string strResponse = streamIn.ReadToEnd();
streamIn.Close();
And then strReponse should contain the values returned by your webservice
然后 strReponse 应包含您的网络服务返回的值
回答by oneNiceFriend
There is an article about your question on asp.net's website. I hope it can help you.
在asp.net 的网站上有一篇关于您的问题的文章。我希望它能帮助你。
How to call an api with asp net
如何使用asp net调用api
http://www.asp.net/web-api/overview/advanced/calling-a-web-api-from-a-net-client
http://www.asp.net/web-api/overview/advanced/calling-a-web-api-from-a-net-client
Here is a small part from the POST section of the article
这是文章POST部分的一小部分
The following code sends a POST request that contains a Product instance in JSON format:
以下代码发送包含 JSON 格式的 Product 实例的 POST 请求：
// HTTP POST
var gizmo = new Product() { Name = "Gizmo", Price = 100, Category = "Widget" };
response = await client.PostAsJsonAsync("api/products", gizmo);
if (response.IsSuccessStatusCode)
{
// Get the URI of the created resource.
Uri gizmoUrl = response.Headers.Location;
}
回答by Ravi Makwana
HereI found this article which is send post request using JsonConvert.SerializeObject()& StringContent()to HttpClient.PostAsyncdata
在这里我发现这篇文章这是使用发送POST请求JsonConvert.SerializeObject()和StringContent()以HttpClient.PostAsync数据
static async Task Main(string[] args)
{
var person = new Person();
person.Name = "John Doe";
person.Occupation = "gardener";
var json = Newtonsoft.Json.JsonConvert.SerializeObject(param);
var data = new System.Net.Http.StringContent(json, Encoding.UTF8, "application/json");
var url = "https://httpbin.org/post";
using var client = new HttpClient();
var response = await client.PostAsync(url, data);
string result = response.Content.ReadAsStringAsync().Result;
Console.WriteLine(result);
}
