C# 如何使用Patch方法异步httpclient

我正在尝试使用[此API]（）。下面是我的代码，但我收到了400个错误的请求

HttpContent z = new StringContent("{\"status\": \"approved\",\"comments\": \"" + Request.QueryString["comment"].ToString() + "\"}", Encoding.UTF8, "application/json");                    

public static async  Task PatchAsync(Uri requestUri, HttpContent content)
{
    try
    {                 
        using (HttpClient client = new HttpClient())
        {
            var method = new HttpMethod("PATCH");
            var request = new HttpRequestMessage(method, requestUri)
            {
                Content = content
            };

            client.DefaultRequestHeaders.Accept.Add(
                new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));

            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic",
                Convert.ToBase64String(
                    System.Text.ASCIIEncoding.ASCII.GetBytes(
                        string.Format("{0}:{1}", "", "XXXXXXXXX"))));

            //using (HttpResponseMessage response = await client.PostAsync(requestUri, content))
            using (HttpResponseMessage response = await client.SendAsync(request))
            {
                response.EnsureSuccessStatusCode();
                string responseBody = await response.Content.ReadAsStringAsync();
                respApproval = responseBody;
            }
        }
    }
    catch (Exception ex)
    {
        respApproval = ex.ToString();
    }
}

---

由于您只提供部分代码，我将我的代码（可以成功更新批准）发布在下面供您参考：

public static async void ApproveRelease()
{
  try
  {
    var username = "alternate auth or PAT";
    var password = "password";
    string accountName = "https://account.visualstudio.com";
    string projectName = "projectname";
    int approvalid = id;
    var approveReleaseUri = "https://accountname.vsrm.visualstudio.com/projectname/_apis/release/approvals/approvlID?api-version=4.1-preview.3";

    using (HttpClient client = new HttpClient())
    {
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic",
        Convert.ToBase64String(
          System.Text.ASCIIEncoding.ASCII.GetBytes(
            string.Format("{0}:{1}", username, password))));

        var method = new HttpMethod("PATCH");
        string approvveReleaseMetaData = "{\"status\":\"approved\", \"comments\":\"Good to go\"}";
        var request = new HttpRequestMessage(method, string.Format(approveReleaseUri, accountName, projectName, approvalid, apiVersion))
        {
            Content = new StringContent(approvveReleaseMetaData, Encoding.UTF8, "application/json")
        };

        using (HttpResponseMessage response = client.SendAsync(request).Result)
        {
            response.EnsureSuccessStatusCode();
            string responseBody = await response.Content.ReadAsStringAsync();
    }
    }
  }
  catch (Exception ex)
  {
    Console.WriteLine(ex.ToString());
  }

}

通过引用博客

---

注意：您只能更新状态为

pending

的发布批准。如果您尝试更新批准状态为

approved

或

rejected

的发布批准，您还将得到

400错误请求

响应。

由于您只提供部分代码，我将代码（可以成功更新批准）发布在下面供您参考：

public static async void ApproveRelease()
{
  try
  {
    var username = "alternate auth or PAT";
    var password = "password";
    string accountName = "https://account.visualstudio.com";
    string projectName = "projectname";
    int approvalid = id;
    var approveReleaseUri = "https://accountname.vsrm.visualstudio.com/projectname/_apis/release/approvals/approvlID?api-version=4.1-preview.3";

    using (HttpClient client = new HttpClient())
    {
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic",
        Convert.ToBase64String(
          System.Text.ASCIIEncoding.ASCII.GetBytes(
            string.Format("{0}:{1}", username, password))));

        var method = new HttpMethod("PATCH");
        string approvveReleaseMetaData = "{\"status\":\"approved\", \"comments\":\"Good to go\"}";
        var request = new HttpRequestMessage(method, string.Format(approveReleaseUri, accountName, projectName, approvalid, apiVersion))
        {
            Content = new StringContent(approvveReleaseMetaData, Encoding.UTF8, "application/json")
        };

        using (HttpResponseMessage response = client.SendAsync(request).Result)
        {
            response.EnsureSuccessStatusCode();
            string responseBody = await response.Content.ReadAsStringAsync();
    }
    }
  }
  catch (Exception ex)
  {
    Console.WriteLine(ex.ToString());
  }

}

通过引用博客

---

注意：您只能更新状态为

pending

的发布批准。如果您尝试更新批准状态为

approved

或

rejected

的发布批准，您还将得到

400错误请求

响应。

请求URI的值是多少？您能否在fiddler中看到请求的主体（内容）是一个合适的json字符串。@Levinija requestUri应该是“System.Uri=new System.Uri”（rmdomain+“projectname”+“/\u api/release/approvals/“+”releaseid”+“？api version=4.1-preview.3”）。如果您有“releaseid”，则需要为Approval设置一个变量。也许你只需要删除引号（如果releaseid是你的approvalId变量的名称）。我刚刚修复了这个问题，正要回复，看到了你的评论@levinja。这就是我传递releaseid而不是approvalid的问题。Marina Liu的便条让我想到了错误的参数。非常感谢。

requestUri

的值是什么？你能在fiddler中看到你的请求（内容）的主体是一个合适的json字符串吗。@Levinija requestUri应该是“System.Uri Uri=new System.Uri”（rmdomain+“projectname”+“/\u api/release/approvals/”+“releaseid”+“api version=4.1-preview.3”），其中有“releaseid”您需要为approvalId设置一个变量。也许你只需要删除引号（如果releaseid是你的approvalId变量的名称）。我刚刚修复了这个问题，正要回复，看到了你的评论@levinja。这就是我传递releaseid而不是approvalid的问题。Marina Liu的便条让我想到了错误的参数。非常感谢。感谢“使用ReleaseManagement REST API”链接的帮助。感谢“使用ReleaseManagement REST API”链接的帮助。