调用Microsoft Calendar创建事件API时遇UnableToDeserializePostBody错误

算力阿峰

2026-7-22

解决Microsoft Graph Calendar创建事件API的400 Bad Request问题

错误原因分析

返回的UnableToDeserializePostBody错误表明请求内容格式不符合API规范，导致服务端无法解析请求体。经检查，存在两处关键问题：

具体修复步骤

修正请求路径语法错误：
原请求路径POST /users/{id}}/calendar/events多了一个闭合大括号，正确路径应为：
```
POST /users/{id}/calendar/events
```

修正请求体body字段的属性错误：
请求体中body对象误用了subject属性，Microsoft Graph要求该字段应为contentType，取值为HTML或Text。修正后的完整请求体如下：

{
    "isOnlineMeeting": true,
    "subject": "Work Today",
    "attendees": [
        {
            "emailAddress": {
                "address": "mohit.gupta@caleedo.com",
                "name": "Mohit Gupta"
            },
            "type": "required"
        }
    ],
    "start": {
        "dateTime": "2023-05-04T16:00:00",
        "timeZone": "India Standard Time"
    },
    "onlineMeetingProvider": "teamsForBusiness",
    "end": {
        "dateTime": "2023-05-04T16:30:00",
        "timeZone": "India Standard Time"
    },
    "body": {
        "contentType": "HTML",
        "content": "I am working hard"
    }
}