如何使用C#将JSON发布到HttpClient?
我不知道如何在HttpClient中发布JSON。我找到了一些解决方案,但我必须使用HttpClient,这是异步的原因,并且必须添加一个头 下面是我的代码。知道怎么修吗如何使用C#将JSON发布到HttpClient?,c#,json,asynchttpclient,C#,Json,Asynchttpclient,我不知道如何在HttpClient中发布JSON。我找到了一些解决方案,但我必须使用HttpClient,这是异步的原因,并且必须添加一个头 下面是我的代码。知道怎么修吗 List<Order> list = new List<Order> { new Order() { Name = "CreatedTime", OrderBy = 1 } }; Queues items = new Queues { Orders = list }; var values = ne
List<Order> list = new List<Order> { new Order() { Name = "CreatedTime", OrderBy = 1 } };
Queues items = new Queues { Orders = list };
var values = new Dictionary<string, string> { { "Orders", JsonConvert.SerializeObject(list) } };
var content = new FormUrlEncodedContent(values);
//HttpContent cc = new StringContent(JsonConvert.SerializeObject(items));
_msg = await _client.PostAsync(input, content);
//_msg = await _client.PostAsync(input, cc);
var response = await _msg.Content.ReadAsStringAsync();
List List=newlist{neworder(){Name=“CreatedTime”,OrderBy=1};
队列项目=新队列{订单=列表};
var values=newdictionary{{“Orders”,JsonConvert.SerializeObject(list)};
var内容=新的FormUrlEncodedContent(值);
//HttpContent cc=newstringcontent(JsonConvert.SerializeObject(items));
_msg=wait_client.PostAsync(输入,内容);
//_msg=wait_client.PostAsync(输入,抄送);
var response=await_msg.Content.ReadAsStringAsync();
您可以使用扩展程序集中的方法:
System.Net.Http.Formatting.dll
范例
public static async Task SendJsonDemo(object content)
{
using(var client = new HttpClient())
{
var response = await client.PostAsJsonAsync("https://example.com", content);
}
}
如果要向请求添加自定义标题,请将其添加到DefaultRequestHeaders
:
client.DefaultRequestHeaders.Add("mycustom", "header1");
您可以发送任何类型的请求,如
public static async Task<HttpResponseMessage> SendRequest(HttpMethod method, string endPoint, string accessToken, dynamic content = null)
{
HttpResponseMessage response = null;
using (var client = new HttpClient())
{
using (var request = new HttpRequestMessage(method, endPoint))
{
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
if (content != null)
{
string c;
if (content is string)
c = content;
else
c = JsonConvert.SerializeObject(content);
request.Content = new StringContent(c, Encoding.UTF8, "application/json");
}
response = await client.SendAsync(request).ConfigureAwait(false);
}
}
return response;
}
公共静态异步任务SendRequest(HttpMethod方法,字符串端点,字符串accessToken,动态内容=null)
{
HttpResponseMessage响应=null;
使用(var client=new HttpClient())
{
使用(var请求=新的HttpRequestMessage(方法,端点))
{
request.Headers.Accept.Add(新的MediaTypeWithQualityHeaderValue(“application/json”);
request.Headers.Authorization=新的AuthenticationHeaderValue(“承载者”,accessToken);
如果(内容!=null)
{
字符串c;
if(内容为字符串)
c=含量;
其他的
c=JsonConvert.SerializeObject(内容);
request.Content=newstringcontent(c,Encoding.UTF8,“application/json”);
}
response=await client.sendaync(请求).ConfigureAwait(false);
}
}
返回响应;
}
我记得我读过一篇文章,说你不应该每次调用都实例化一个HttpClient。