C# GetCookies（）在WebApi控制器中返回null

我有两个项目，一个是客户端，另一个是API提供者。当我向api提供程序发送请求时，“request.Headers.GetCookies（）”在客户端部分上有值，但在

public class AuthorizationServerProvider : OAuthAuthorizationServerProvider
{
public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
    {
        var test1 = context.Request.Headers.ToList().FirstOrDefault(h => h.Key == "Cookie");

test1为null，并且为空

public class CustomAuthorizeAttribute : AuthorizeAttribute
{

    public override void OnAuthorization(HttpActionContext actionContext)
    {
          var test2 = actionContext.Request.Headers.GetCookies();

test2为空，这是我发送请求的方式：

[HttpPost]
public ActionResult PostToApiProvider(RequestViewModel requestModel)
{
    var request = new HttpResponseMessage();
    // Here I add cookie header in request for authentification
    if (HttpContext.Request.Cookies.Count != 0)
        {
            var cookieList = new List<string>();
            for (var i = 0; i < Request.Cookies.Count; i++)
            {
                cookieList.Add(Request.Cookies[i].Value);
            }

            request.Headers.Add("Cookie", cookieList);
        }
    var response = client.SendAsync(request).Result;
    var testRequestCookies = request.Headers.GetCookies();
return View("SomeView", model)

[HttpPost]
公共操作结果PostToApiProvider（RequestViewModel requestModel）
{
var request=newhttpresponsemessage（）；
//在这里，我在身份验证请求中添加cookie头
if（HttpContext.Request.Cookies.Count！=0）
{
var cookieList=新列表（）；
对于（变量i=0；i

request和TestRequestCookie（调用api提供程序之前和之后）将具有cookie值，请参见屏幕截图：

---

如果我能在更多代码方面提供帮助，请询问。谢谢：）

以下是如何获取cookie值

private async Task<string> GetCookieValue(string url, string cookieName)
{
    var cookieContainer = new CookieContainer();
    var uri = new Uri(url);
    using (var httpClientHandler = new HttpClientHandler
    {
        CookieContainer = cookieContainer
    })
    {
        using (var httpClient = new HttpClient(httpClientHandler))
        {
            await httpClient.GetAsync(uri);
            var cookie = cookieContainer.GetCookies(uri).Cast<Cookie>().FirstOrDefault(x => x.Name == cookieName);
            return cookie?.Value;
        }
    }
}

private异步任务GetCookieValue（字符串url，字符串cookieName）
{
var cookieContainer=新的cookieContainer（）；
var uri=新的uri（url）；
使用（var httpClientHandler=新的httpClientHandler
{
CookieContainer=CookieContainer
})
{
使用（var httpClient=新的httpClient（httpClientHandler））
{
等待httpClient.GetAsync（uri）；
var cookie=cookieContainer.GetCookies（uri.Cast（）.FirstOrDefault（x=>x.Name==cookieName）；
返回cookie？值；
}
}
}