Azure DevOps：尝试使用API​​更新工作项状态时遇到错误

Question

我正在尝试编写一个代码来通过Azure DevOps REST API更新工作项状态。 我有一个错误（400）。

这是我调用服务的代码：

string updateFeaturesStateBody = "
[
    {
        "op": "test",
        "path": "/rev",
        "value": "4"
    },
    {
        "op": "add",
        "path": "/fields/System.State",
        "value": "Blocked"
    },
    {
        "op": "add",
        "path": "/fields/System.Reason",
        "value": "State changed as part of PWR planning"
    },
    {
        "op": "add",
        "path": "/fields/System.History",
        "value": "State changed as part of PWR planning"
    }
]";

StringContent wibatchContent = new StringContent(updateFeaturesStateBody, Encoding.UTF8, "application/json");

HttpResponseMessage responseMessage = await HttpClient.PatchAsync($"/{Org}/_apis/wit/workitems/{ID}?api-version=6.0", wibatchContent);

我始终得到响应：状态代码：400，推理：“不良请求”

有人可以帮助我弄清楚问题是什么？

Answer 1

400错误的原因有很多，请在可能的情况下分享详细的错误消息。请确保您要修改的状态存在，并满足修改状态的先决条件。

从您的代码中我可以看出，您没有指定适当的标头。

此REST API具有对请求车身类型的要求，您必须指定它。

以下代码在我这边工作正常：

using RestSharp;
using System;

namespace ChangeStatus
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
            string OrgName = "<organization name>";
            string ProjectName = "<project name>";
            string workitem_id = "<workitem id>";
            string state_tochange = "<valid value of workitem>";
            string PAT = "<PAT token here>";
            var client = new RestClient("https://dev.azure.com/"+OrgName+"/"+ProjectName+"/_apis/wit/workitems/"+workitem_id+"?api-version=6.0");
            var request = new RestRequest("https://dev.azure.com/"+OrgName+"/"+ProjectName+"/_apis/wit/workitems/"+workitem_id+"?api-version=6.0", Method.Patch);
            request.AddHeader("Content-Type", "application/json-patch+json");
            request.AddHeader("Authorization", "Basic "+PAT);
            var body = @"
                " + "\n" +
                            @"    [{
                " + "\n" +
                            @"        ""op"": ""add"",
                " + "\n" +
                            @"        ""path"": ""/fields/System.State"",
                " + "\n" +
                            @"        ""value"": """+
                                                        $"{state_tochange}"+
                            @"""
                " + "\n" +
                            @"    }]";
            request.AddParameter("application/json-patch+json", body, ParameterType.RequestBody);


            var response = client.Execute(request);
            Console.WriteLine(response.Content);
        }
    }
}

Answer 2

我最终了解了什么问题：

我必须更改以下行：

String content wibatchContent = new StringContent（updateFeatUressTateBody，Encoding.utf8，“ application/json”）;

to以下行：

code> string string wibatchContent wibatchContent wibatchContent = new StringContent（updateFeatureStateBody，encoding.utf8， “应用程序/JSON-PATCH+JSON”）;