静默更新PlannerTaskDetails失败 [英] Updating PlannerTaskDetails silently fails

问题描述

我正在使用Microsoft Graph .Net SDK与Planner进行交互. 我刚刚创建了PlannerTask，我想设置Description属性.

I'm using the Microsoft Graph .Net SDK to interact with Planner. I've just created a PlannerTask, and I'd like to set the Description property.

我的方法包括在:如何我可以创建带有说明的计划任务吗?

以下是获取返回的PlannerTaskDetails对象，修改描述然后更新的代码:

Here's the code which takes the returned PlannerTaskDetails object, modifies the Description, and then updates it:

var taskDetails = taskDetailsResult.Result; // Get Previous Task Details
taskDetails.Description = description;

task.Details = await graphServiceClient
    .Planner
    .Tasks[task.Id]
    .Details
    .Request()
    .Header("If-Match", taskDetails.GetEtag())
    .UpdateAsync(taskDetails);

UpdateAsync返回，但返回null. 也不例外，null显然不包含任何更多信息，并且Description不变.

UpdateAsync returns, but it returns a null. There's no exception, the null obviously contains no further information, and the Description is not changed.

我使用Fiddler监视来回的HTTP通信.我可以看到PATCH请求正在发送到Graph API，并且它设置了If-Match标头.

I used Fiddler to monitor the HTTP traffic going back and forth. I can see that a PATCH request is being sent to the Graph API, and it has the If-Match header set.

奇怪的是，请求主体中的JSON对象具有两次列出的description属性！第一次使用我的值，第二次使用null.

Oddly, the JSON object in the request body has the description property listed twice! The first time with my value, and the second time with a null.

我认为反序列化器将使用它看到的某个属性的最后一个值，因此这就是为什么它不会更新.

I assume the deserializer is taking the last value it sees for a property, and so that's why it doesn't update.

我在做什么错了?

推荐答案

您正确地将代码更改为使用补丁程序对象，而不是重用现有的PlannerTaskDetail.要取回更新的对象(如果支持)，则需要设置preferred标头.

You correctly changed your code to use a patch object instead of reusing the existing PlannerTaskDetail. To get back the updated object (if this is supported), you'll need to set the prefer header.

http://docs.oasis-open.org/odata/odata/v4.0/errata03/os/complete/part1-protocol/odata-v4.0-errata03-os-part1-protocol-complete.html#_Toc453752234, section 8.2.8.7

.Header("prefer", "return=representation")

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