IGraphServiceUsersCollectionRequest (GraphServiceClient) 的部门不是空过滤器

Question

如何为部门 属性 创建非空过滤器以通过 GraphServiceClient 获取用户？

department ne null

和

NOT(department eq null)

不工作

我当前的代码：

var request = _graphClient.Users.Request()
    .Filter($"department ne null");
        
var usersPage = await request.GetAsync();

Answer 1

按 department 过滤需要添加 header ConsistencyLevel:eventual 并且 $count 参数必须设置为 true.

根据 documentation department 仅在 $select 上返回。这意味着如果您需要知道 department 的值，您必须添加 Select 方法并指定要返回的所有属性，包括 department.

var queryOptions = new List<QueryOption>()
{
    new HeaderOption("ConsistencyLevel", "eventual");
    new QueryOption("$count", "true")
};

var request = await _graphClient.Users
    .Request( queryOptions )
    .Select("id,displayName,department") // and other properties
    .Filter("department ne null"); // .Filter("NOT(department eq null)") should also work

var usersPage = await request.GetAsync();

资源：

Advanced queries

User properties