我正在尝试用 C# 构建一个小型应用程序,以从 Microsoft Graph API 检索建议的 session 时间。身份验证后,我调用graphClient.HttpProvider.SendAsync(t);
希望获得建议的 session 时间。但是,通过断点单步执行,一切似乎都很顺利,直到该调用,然后 FindMeetingTimes 请求内容为空/空。
调用:eventsService.RunAsync();
internal async Task RunAsync()
{
try
{
// Create request object
var findMeetingTimeRequest = new FindMeetingTimeRequestModel
{
Attendees = new List<AttendeeBase>
{
new AttendeeBase
{
EmailAddress = new EmailAddress {Address = "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="7c11051d18180e190f0f3c1813111d1512521f1311" rel="noreferrer noopener nofollow">[email protected]</a>" },
Type = AttendeeType.Required
}
},
LocationConstraint = new LocationConstraint
{
IsRequired = true,
SuggestLocation = false,
Locations = new List<LocationItemModel>
{
new LocationItemModel{ DisplayName = "A116", Address = null, Coordinates = null }
}
},
TimeConstraint = new TimeConstraintModel
{
TimeSlots = new List<TimeSlotModel>
{
new TimeSlotModel
{
Start = new DateTimeValueModel
{
Date = "2018-03-23",
Time = "08:00:00",
TimeZone = "Central Standard Time"
},
End = new DateTimeValueModel
{
Date = "2018-03-23",
Time = "09:00:00",
TimeZone = "Central Standard Time"
}
}
}
},
MeetingDuration = new Duration("PT1H"),
MaxCandidates = 99,
IsOrganizerOptional = false,
ReturnSuggestionHints = false
};
GraphServiceClient graphClient = SDKHelper.GetAuthenticatedClient();
var t = graphClient.Me.FindMeetingTimes(findMeetingTimeRequest.Attendees, findMeetingTimeRequest.LocationConstraint, findMeetingTimeRequest.TimeConstraint, findMeetingTimeRequest.MeetingDuration, findMeetingTimeRequest.MaxCandidates, findMeetingTimeRequest.IsOrganizerOptional).Request().GetHttpRequestMessage();
await graphClient.AuthenticationProvider.AuthenticateRequestAsync(t);
var response = await graphClient.HttpProvider.SendAsync(t);
var jsonString = await response.Content.ReadAsStringAsync();
Console.WriteLine(jsonString);
return;
}catch(Exception ex)
{
Console.WriteLine(ex.Message);
return;
}
}
我有点不知道下一步该尝试什么。我查看了示例,到目前为止只有少数使用 GraphServiceClient/SDKHelper 进行身份验证。这可能是问题的一部分吗?
我在 await graphClient.HttpProvider.SendAsync(t);
期间遇到了两个异常:
Exception thrown: 'Microsoft.Graph.ServiceException' in Microsoft.Graph.Core.dll
Exception thrown: 'System.NullReferenceException' in System.Web.dll
更新:使用下面 Michael 的评论中的引用和 FindMeetingTimes() 的空参数列表的原始代码,我收到了凭据异常:
"Code: ErrorAccessDenied\r\nMessage: Access is denied. Check credentials and try again.\r\n\r\nInner error\r\n"
调用
await eventsService.EventFindMeetingsTimes(graphClient);
public async System.Threading.Tasks.Task EventFindMeetingsTimes(GraphServiceClient graphClient)
{
try
{
User me = await graphClient.Me.Request().GetAsync();
// Get the first three users in the org as attendees unless user is the organizer.
var orgUsers = await graphClient.Users.Request().GetAsync();
List<Attendee> attendees = new List<Attendee>();
Attendee attendee = new Attendee();
attendee.EmailAddress = new EmailAddress();
attendee.EmailAddress.Address = "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="3f515e525a7f5b50525e5651115c5052" rel="noreferrer noopener nofollow">[email protected]</a>";
attendees.Add(attendee);
// Create a duration with an ISO8601 duration.
Duration durationFromISO8601 = new Duration("PT1H");
MeetingTimeSuggestionsResult resultsFromISO8601 = await graphClient.Me.FindMeetingTimes(attendees,
null,
null,
durationFromISO8601,
2,
true,
false,
10.0).Request().PostAsync();
List<MeetingTimeSuggestion> suggestionsFromISO8601 = new List<MeetingTimeSuggestion>(resultsFromISO8601.MeetingTimeSuggestions);
}
catch (Exception e)
{
Console.WriteLine("Something happened, check out a trace. Error code: {0}", e.Message);
}
}
当我使用 GraphExplorer 进行测试时,我用来登录的帐户可以正常工作。凭证/ token 是否有可能没有通过 Web 表单传递到图形客户端?
解决方案:Graph Docs example <-- 由 Michael 提供帮助正确设置格式。 Find meeting times problem #559 <-- Marc 透露,权限最终需要更新,并最终解决了我的更新问题。
最佳答案
您忘记在 SendAsync(t)
之前设置 HttpMethod。它使用 GET 而不是 POST。
t.Method = System.Net.Http.HttpMethod.Post;
话虽如此,我同意马克的观点。使用客户端库的内置功能:
关于c# - HttpProvider.SendAsync() 空内容,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49370597/