[英]C# HttpClient - PutAsync
我有一個后端控制器方法
[Route("{ropeId}/segments")]
[HttpPut]
public async Task<IActionResult> Put([NotNull] [FromBody] IEnumerable<Segment> segments)
{
Debug.WriteLine("In here!");
}
我可以使用 Rider 中的便箋簿擊中此罰款:
PUT https://localhost:6001/api/ropes/3/segments
Accept: */*
Cache-Control: no-cache
Content-Type: application/json
[{"SegmentNo":1,"RopeId":3,"LastReceived":"2019-12-28T14:34:35.9799039+01:00","BendDamage":0.018,"Temperature":30.0,"LoadLevel":1},
{"SegmentNo":16,"RopeId":3,"LastReceived":"2019-12-28T14:34:35.9799039+01:00","BendDamage":0.018,"Temperature":30.0,"LoadLevel":1}, {"SegmentNo":50,"RopeId":3,"LastReceived":"2019-12-28T14:34:35.9799039+01:00","BendDamage":0.018,"Temperature":30.0,"LoadLevel":1},
{"SegmentNo":69,"RopeId":3,"LastReceived":"2019-12-28T14:34:35.9799039+01:00","BendDamage":0.018,"Temperature":30.0,"LoadLevel":1},
{"SegmentNo":101,"RopeId":3,"LastReceived":"2019-12-28T14:34:35.9799039+01:00","BendDamage":0.018,"Temperature":30.0,"LoadLevel":1}, {"SegmentNo":106,"RopeId":3,"LastReceived":"2019-12-28T14:34:35.9799039+01:00","BendDamage":0.018,"Temperature":30.0,"LoadLevel":1},
{"SegmentNo":128,"RopeId":3,"LastReceived":"2019-12-28T14:34:35.9799039+01:00","BendDamage":0.018,"Temperature":30.0,"LoadLevel":1}]
細分模型:
public sealed class Segment
{
public Segment(short segmentNo,
byte ropeId,
DateTime lastReceived,
double bendDamage,
double temperature,
byte loadLevel)
{
SegmentNo = segmentNo;
RopeId = ropeId;
LastReceived = lastReceived;
BendDamage = bendDamage;
Temperature = temperature;
LoadLevel = loadLevel;
}
public short SegmentNo { get; }
public byte RopeId { get; }
public DateTime LastReceived { get; }
public double BendDamage { get; }
public double Temperature { get; }
public byte LoadLevel { get; }
}
我無法使用 httpClient PutAsync 調用來命中它。
我試過了:
var httpContent = new StringContent(updatedSegments);
var response = await httpClient.PutAsync(@"https://localhost:6001/api/ropes/3/segments", httpContent);
但是我得到了一個 SerializeError。
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker[1]
Route matched with {action = "Put", controller = "Ropes"}. Executing action WEBAPI.Controllers.RopesController.Put (WEBAPI)
info: Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor[1]
Executing ObjectResult, writing value of type 'Microsoft.AspNetCore.Mvc.SerializableError'.
我的 PutAsync 調用有什么問題?
就像我說的,這適用於 Postman / PUT scratch。
如果我做
var s = await httpContent.ReadAsStringAsync();
s.Print();
我得到了上面的 JSON,所以我認為問題是我需要在 httpContent 上以某種方式設置一個標頭來告訴它它是 application/json?
您是否嘗試在構造函數上為 httpContent 對象指定內容類型? 我使用 httpClient 調用並聲明該類型對我有用,如下所示:
var httpContent= new StringContent(updatedSegments.ToString(Newtonsoft.Json.Formatting.None), Encoding.UTF8, "application/json");
讓我知道它是否也適合你
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