问现在要求通过c#刷新power bi report 错误解决不了 azure和BI是中国版的 ？

public ActionResult Index()

{

string AuthorityUrl = @"https://login.windows.net/common/oauth2/authorize";

string ResorceUrl = @"https://analysis.windows.net/powerbi/api";

string APIUrl = @"https://api.powerbi.cn";

string ClientId = "1950a258-227b-4e31-a9cf-717495945fc2";

string Account = "账号";

string Pwd = "密码";

string groupId = "2a8498b7-83d2-4913-af70-111867101fcb";

string datasetId = "2594184";

string result = Result(Account, Pwd, AuthorityUrl, ResorceUrl, APIUrl, ClientId, groupId, datasetId);

ViewBag.msg = result;

return View();

}

private string Result(string Username, string Password, string AuthorityUrl, string ResourceUrl, string ApiUrl, string ClientId, string GroupId, string DatasetId)

{

var credential = new UserPasswordCredential(Username, Password);

var authenticationContext = new AuthenticationContext(AuthorityUrl);

var authenticationResult = authenticationContext.AcquireTokenAsync(ResourceUrl, ClientId, credential).Result;

if (authenticationResult == null)

{

return null;

}

var tokenCredentials = new TokenCredentials(authenticationResult.AccessToken, "Bearer");

// Create a Power BI Client object. It will be used to call Power BI APIs.

using (var client = new PowerBIClient(new Uri(ApiUrl), tokenCredentials))

{

string res = null;

// Get a list of reports.

HttpWebRequest request;

var url = "https://api.powerbi.com/v1.0/myorg/groups/{0}/datasets/{1}/refreshes";

request = HttpWebRequest.CreateHttp(string.Format(url, GroupId, DatasetId));

request.KeepAlive = true;

request.Method = "POST";

request.ContentLength = 0;

request.Headers.Add("Authorization", String.Format("Bearer {0}", authenticationResult.AccessToken));

using (Stream writer = request.GetRequestStream())

{

var response = (HttpWebResponse)request.GetResponse();

res += ("Dataset refresh request{0}", response.StatusCode.ToString());

}

return res;

}

}