在 C# 中创建 MS Teams 团队 - AddAsync returns null

Question

上下文：

我正在使用 C# 中的 MS Graph API 创建新的 MS Teams 团队

我的代码：

var newTeam = new Team()
{
    DisplayName = model.DisplayName,
    Description = model.Description,
    AdditionalData = new Dictionary<string, object>
    {
        ["template@odata.bind"] = $"{graph.BaseUrl}/teamsTemplates('standard')",
        ["members"] = owners.ToArray()
    }
};

var team = await graph.Teams.Request().AddAsync(newTeam);

问题：

团队创建得很好，但我无法获取它的 ID。 Return 类型的 AddAsync 方法是 Task<Team> 但它总是 returns 空。我使用 Fiddler 检查了服务器响应，发现创建的团队的 ID 在响应中返回 headers。

Content-Location: /teams('cbf27e30-658b-4021-a8c6-4002b9adaf41')

很遗憾，我不知道如何访问这些信息。

Answer 1

您将通过调用 GET joined Teams 获取您的团队 ID，它将获取团队 ID、名称和描述

Answer 2

幸运的是，这很容易通过使用请求基础 class BaseRequest 并自己发送来实现。使用收到的 HttpResponseMessage，您将获得 headers 记录 here，其中包含您的新团队的 ID。

该代码还包括如何使用忙等待等待团队创建完成——这不被视为最佳实践，但使示例更容易。更好的方法是存储团队 ID 并定期查询创建状态。

var newTeam = new Team()
{
    DisplayName = model.DisplayName,
    Description = model.Description,
    AdditionalData = new Dictionary<string, object>
    {
        ["template@odata.bind"] = $"{graph.BaseUrl}/teamsTemplates('standard')",
        ["members"] = owners.ToArray()
    }
};

// we cannot use 'await client.Teams.Request().AddAsync(newTeam)'
// as we do NOT get the team ID back (object is always null) :(
BaseRequest request = (BaseRequest)graph.Teams.Request();
request.ContentType = "application/json";
request.Method = "POST";

string location;
using (HttpResponseMessage response = await request.SendRequestAsync(newTeam, CancellationToken.None))
    location = response.Headers.Location.ToString();

// looks like: /teams('7070b1fd-1f14-4a06-8617-254724d63cde')/operations('c7c34e52-7ebf-4038-b306-f5af2d9891ac')
// but is documented as: /teams/7070b1fd-1f14-4a06-8617-254724d63cde/operations/c7c34e52-7ebf-4038-b306-f5af2d9891ac
// -> this split supports both of them
string[] locationParts = location.Split(new[] { '\'', '/', '(', ')' }, StringSplitOptions.RemoveEmptyEntries);
string teamId = locationParts[1];
string operationId = locationParts[3];

// before querying the first time we must wait some secs, else we get a 404
int delayInMilliseconds = 5_000;
while (true)
{
    await Task.Delay(delayInMilliseconds);

    // lets see how far the teams creation process is
    TeamsAsyncOperation operation = await graph.Teams[teamId].Operations[operationId].Request().GetAsync();
    if (operation.Status == TeamsAsyncOperationStatus.Succeeded)
        break;

    if (operation.Status == TeamsAsyncOperationStatus.Failed)
        throw new Exception($"Failed to create team '{newTeam.DisplayName}': {operation.Error.Message} ({operation.Error.Code})");

    // according to the docs, we should wait > 30 secs between calls
    // https://docs.microsoft.com/en-us/graph/api/resources/teamsasyncoperation?view=graph-rest-1.0
    delayInMilliseconds = 30_000;
}

// finally, do something with your team...

在 C# 中创建 MS Teams 团队 - AddAsync returns null

Create MS Teams team in C# - AddAsync returns null

c#

microsoft-teams

microsoft-graph-api