如何正确表示 Microsoft Graph 的 Event 对象？答案

【问题标题】：How do I properly represent an Event object for Microsoft Graph?如何正确表示 Microsoft Graph 的 Event 对象？
【发布时间】：2016-07-08 04:47:10
【问题描述】：

我目前正在尝试使用带有 ASP .NET MVC 的 Microsoft Graph API 在用户 Outlook 日历上创建事件。不幸的是，创建事件的文档不包括示例。我已经找到并尝试修改发送电子邮件的示例（此处：https://github.com/microsoftgraph/aspnet-connect-rest-sample）。我能够将一个完全空白的初始事件发送到我的日历。当尝试发送事件对象本身时，我遇到了状态响应 BAD REQUEST。如果有人可以提供帮助，将不胜感激。

【问题讨论】：

标签： asp.net office365 microsoft-graph-api

【解决方案1】：

有关如何构造 Event 对象的参考，您可以查看官方 Microsoft Graph SDK 是如何构造该对象的：请参阅 GitHub 上的最新源 here。

有关在不使用 SDK 的情况下进行此 REST 调用的示例，您可以参考 UserSnippets#CreateEventAsync() - 摘录粘贴在下面。虽然下面的示例没有使用本机对象进行序列化，但它希望能传达其工作原理的本质。

HttpClient client = new HttpClient();
var token = await AuthenticationHelper.GetTokenHelperAsync();
client.DefaultRequestHeaders.Add("Authorization", "Bearer " + token);

// Endpoint for the current user's events
Uri eventsEndpoint = new Uri(serviceEndpoint + "me/events");

// Build contents of post body and convert to StringContent object.
// Using line breaks for readability.

// Specifying the round-trip format specifier ("o") to the DateTimeOffset.ToString() method
// so that the datetime string can be converted into an Edm.DateTimeOffset object:
// https://msdn.microsoft.com/en-us/library/az4se3k1(v=vs.110).aspx#Roundtrip

string postBody = "{'Subject':'Weekly Sync'," + "'Location':{'DisplayName':'Water Cooler'}," + "'Attendees':[{'Type':'Required','EmailAddress': {'Address':'mara@fabrikam.com'} }]," + "'Start': {'DateTime': '" + new DateTime(2014, 12, 1, 9, 30, 0).ToString("o") + "', 'TimeZone':'UTC'}," + "'End': {'DateTime': '" + new DateTime(2014, 12, 1, 10, 0, 0).ToString("o") + "', 'TimeZone':'UTC'}," + "'Body':{'Content': 'Status updates, blocking issues, and next steps.', 'ContentType':'Text'}}";

var createBody = new StringContent(postBody, System.Text.Encoding.UTF8, "application/json");

HttpResponseMessage response = await client.PostAsync(eventsEndpoint, createBody);

if (response.IsSuccessStatusCode) {
 string responseContent = await response.Content.ReadAsStringAsync();
 jResult = JObject.Parse(responseContent);
 createdEventId = (string) jResult["id"];
 Debug.WriteLine("Created event: " + createdEventId);
} else {
 // some appropriate error handling here
}

有关传输的 JSON 的示例：

{
    "subject": "Weekly Sync",
    "location": {
        "displayName": "Water Cooler"
    },
    "attendees": [
        {
            "type": "Required",
            "emailAddress": {
                "address": "mara@fabrikam.com"
            }
        }
    ],
    "start": {
        "dateTime": "2016-02-02T17:45:00.0000000",
        "timeZone": "UTC"
    },
    "end": {
        "dateTime": "2016-02-02T18:00:00.0000000",
        "timeZone": "UTC"
    },
    "body": {
        "content": "Status updates, blocking issues,and nextsteps.",
        "contentType": "Text"
    }
}

其他帮助：有一个有用的 Graph Explorer Sandbox 可供您在浏览器中测试请求

【讨论】：