TFS WorkItem Attachments 可以保存但不能加载

Question

我可以像这样将附件保存到 WorkItem：

TfsTeamProjectCollection tfsTeamProjects = new TfsTeamProjectCollection(new Uri(tfsServerUrl));
WorkItemStore tfsWorkItemStore = tfsTeamProjects.GetService<WorkItemStore>();
WorkItem tfsWorkItem = tfsWorkItemStore.GetWorkItem(tfsWorkItemId);

FileInfo fi = new FileInfo(@"D:\\Docs\testfile.txt");
Attachment tfsAttachment = new Attachment(fi.FullName);
tfsWorkItem.Attachments.Add(tfsAttachment);
tfsWorkItem.Save();

但是当我尝试获取这样的 WorkItem 的附件列表时：

TfsTeamProjectCollection tfsTeamProjects = new TfsTeamProjectCollection(new Uri(tfsServerUrl));
WorkItemStore tfsWorkItemStore = tfsTeamProjects.GetService<WorkItemStore>();
WorkItem tfsWorkItem = tfsWorkItemStore.GetWorkItem(tfsWorkItemId);
foreach(Attachment tfsAttachment : tfsWorkItem.Attachments)
{
    // Do things here
}

tfsWorkItem.Attachments 始终为空，即使我可以在 TFS Web UI 的“对象”选项卡中看到四个附件。我得到的 WorkItem 对象是正确的。

Answer 1

我不记得所有细节，但the code I wrote a while ago 使用了一个封装类来启用 LINQ。

``` 类 AttachmentEnumerable : IEnumerable { 私有 AttachmentCollection 底层集合；

public AttachmentEnumerable(AttachmentCollection coll)
{ underlyingCollection = coll; }

public IEnumerator<Attachment> GetEnumerator()
{
    foreach (Attachment item in underlyingCollection)
    {
        yield return item;
    }
}

System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
{
    return this.GetEnumerator();
}

} ```

此外，Attachment 对象仅包含一个您必须稍后下载的 URL。

Answer 2

我已经尝试过完全相同的场景，它确实对我有用。我可以附加该文件，然后使用您提到的 AttachmentCollection 获取它。您可以尝试做的是在相同的上下文中执行它，如下所示，并验证 AttachementCollection 在这种情况下是否仍然为空：

TfsTeamProjectCollection tfsTeamProjects = new TfsTeamProjectCollection(new Uri(tfsServerUrl));
WorkItemStore tfsWorkItemStore = tfsTeamProjects.GetService<WorkItemStore>();
WorkItem tfsWorkItem = tfsWorkItemStore.GetWorkItem(tfsWorkItemId);
FileInfo fi = new FileInfo(@"D:\\New Text Document.txt");
Attachment tfsAttachment = new Attachment(fi.FullName);
tfsWorkItem.Attachments.Add(tfsAttachment);
tfsWorkItem.Save();
foreach (Attachment tfsAttachment1 in tfsWorkItem.Attachments)
                {
                    // Do things here
                }

如果此处的集合不为空，则很可能在您尝试获取附件的第二次调用中存在另一个问题。