validate 方法返回不需要的字段

Question

当我创建一个新工作项时，我将其设置为：

WorkItem workitem = new WorkiItem(workItemType);

然后我只需直接验证即可获得所有必填字段，因此我知道在保存之前需要填写哪些字段。

ArrayList requiredFields = workitem.Validate();

但在我的 requiredFields 中，有一个字段，在字段定义中未标记为必填字段。例如，有一个字段“Assigned To”，它不是必填字段，因此我可以在 TFS-Webapplication 内部创建一个工作项，而无需填写此字段。那么为什么在验证时它会被放入 requiredField 列表中呢？如果它没有经过验证，我不想保存它。

Answer 1

WorkItem 验证在 WorkItemType 的模板中定义。根据WorkItem的当前状态（option1）或当前用户的权限（option2），字段可以有不同的验证要求以下代码是这两个选项的示例，供您参考：

 // Set the following variables accordingly
        string workItemTypeName = "Bug";
        string teamProjectName = "My Project";
        string usernameToImpersonate = "XXX";
        string tfsTeamProjectCollectionUrl = "http://xxx:8080/tfs/defaultcollection";

    // OPTION 1: no impersonation.
    // Get an instance to TFS using the current thread's identity.
    // NOTE: The current thread's identity needs to have the "" permision or else you will receive
    //       a runtime SOAP exception: "Access Denied: [username] needs the following permission(s) to perform this action: Make requests on behalf of others"
    TfsTeamProjectCollection tfs = new TfsTeamProjectCollection( new Uri( tfsTeamProjectCollectionUrl ) );
    IIdentityManagementService identityManagementService = tfs.GetService<IIdentityManagementService>();

    // OPTION 2: impersonation.  Remove the following two lines of code if you don't need to impersonate.
    // Get an instance to TFS impersonating the specified user.
    // NOTE: This is not needed if the current thread's identity is that of the user 
    //       needed to impersonate. Simple use the ablve TfsTeamProjectCollection instance
    TeamFoundationIdentity identity = identityManagementService.ReadIdentity( IdentitySearchFactor.AccountName, usernameToImpersonate, MembershipQuery.None, ReadIdentityOptions.None );
    tfs = new TfsTeamProjectCollection( tfs.Uri, identity.Descriptor );

    WorkItem workItem = null;
    WorkItemStore store = tfs.GetService<WorkItemStore>();

    // Determine if we are creating a new WorkItem or loading an existing WorkItem.
    if( workItemId.HasValue ) {
       workItem = store.GetWorkItem( workItemId.Value );
    }
    else {
       Project project = store.Projects[ teamProjectName ];
       WorkItemType workItemType = project.WorkItemTypes[ workItemTypeName ];
       workItem = new WorkItem( workItemType );
    }

    if( workItem != null ) {

       foreach( Field field in workItem.Fields ) {
          if( field.IsRequired ) {
             // TODO
          }
       }
    }