咨询区
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LP13
在 Asp.NET 中我一般都用 PostAsJsonAsync()
做数据提交,在 Asp.NET Core 时代我貌似没有找到,按照程序集的命名规范,我觉得应该也是由 Microsoft.AspNet.WebApi.Client
迁移到 Microsoft.AspNetCore.WebApi.Client
中。.
回答区
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Jeremy Caney
从 .NET 5.0
开始,你说的这个方法被引入到了 HttpClient
中,你可以引入 System.Net.Http.Json
命名空间,可以参考微软的官方文档:https://docs.microsoft.com/en-us/dotnet/api/system.net.http.json.httpclientjsonextensions.postasjsonasync?view=net-5.0
参考如下代码:
using System.Net.Http; //HttpClient, HttpResponseMessage
using System.Net.Http.Json; //HttpClientJsonExtensions
using System.Threading; //CancellationToken
using System.Threading.Tasks; //Task
namespace ConsoleApp2
{
class Program
{
static void Main(string[] args)
{
var httpClient = new HttpClient();
var url = "https://StackOverflow.com";
var data = new MyDto();
var source = new CancellationTokenSource();
var response = await httpClient.PostAsJsonAsync<MyDto>(url, data, source.Token);
}
}
}
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j.ghadiri
之所以没有是因为 *AsJsonAsync()
系列方法本身就不是 ASP.NET Core
项目的一部分,不过你可以在 ASP.NET Core
中扩展一个 PostAsJsonAsync
方法即可 ,参考如下代码:
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Newtonsoft.Json;
public static class HttpClientExtensions
{
public static Task<HttpResponseMessage> PostAsJsonAsync<T>(this HttpClient httpClient, string url, T data)
{
var dataAsString = JsonConvert.SerializeObject(data);
var content = new StringContent(dataAsString);
content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
return httpClient.PostAsync(url, content);
}
public static Task<HttpResponseMessage> PutAsJsonAsync<T>(this HttpClient httpClient, string url, T data)
{
var dataAsString = JsonConvert.SerializeObject(data);
var content = new StringContent(dataAsString);
content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
return httpClient.PutAsync(url, content);
}
public static async Task<T> ReadAsJsonAsync<T>(this HttpContent content)
{
var dataAsString = await content.ReadAsStringAsync().ConfigureAwait(false);
return JsonConvert.DeserializeObject<T>(dataAsString);
}
}
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f.capet
既然是异步的 post json
,其实你可以用 HttpClient 中现存的 PostAsync()
方法做个周转就好了,data 数据可以用 JsonConvert.SerializeObject
序列化,参考如下代码:
public static async Task<HttpResponseMessage> PostAsJsonAsync<T>(
this HttpClient httpClient, string url, T data)
{
var dataAsString = JsonConvert.SerializeObject(data);
var content = new StringContent(dataAsString);
content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
return await httpClient.PostAsync(url, content);
}
点评区
确实现如今都被 HttpClient
所替代,而且这个类还是内置的,不需要引用任何 Nuget 包,太方便了。