无法在事件处理程序中将用户添加到 Sharepoint 2010
使用同步和异步事件处理程序（itemAdded 和 itemAdding），我无法使用基于表单的身份验证将用户添加到我的 Sharepoint 2010 站点（我知道该身份验证已正确设置和工作，因为它在 Sharepoint 中一直运行良好）据我所知，UI）
调用 Membership.CreateUser 不起作用，并且不断抛出“对象引用未设置到对象实例”的异常。调试并查看会员资格，很明显出现了问题。大多数成员为空或抛出异常。我知道会员资格在应用程序页面中没有这个问题（我可以从应用程序页面添加用户、将它们添加到组等，但它在事件处理程序内部失败）。我们最初认为这是一个 HttpContext 问题，但我们可以在 itemAdding() 中获取 HttpContext.Current，因此这可能没有太大区别。
有什么线索吗？是否可以在事件处理程序中将用户添加到 SP2010？
背景：当我向列表（带有电子邮件列）添加新行时，将向具有指定电子邮件地址的用户授予权限 - 如果该用户不存在，我想创建它（同样，对于基于表单的身份验证）
Using both synchronous and asycnhronous event handlers (itemAdded and itemAdding), I have been unable to add a user to my Sharepoint 2010 site - using Forms Based Authentication (which I know to be properly setup and working because it has been working perfectly from the Sharepoint UI from what I can tell)
Calling Membership.CreateUser is not working and constantly throws an exception of "object reference not set to an instance of an object". Debugging and looking into Membership, it is clear that something is wrong. Most members are null or throw exceptions as well. I know Membership doesn't have this issue in an Application Page (I can add users, add them to groups, etc.. from an Application page, but it fails inside of an event handler). We originally thought it was a HttpContext issue, but we can get HttpContext.Current inside itemAdding(), so that might not make much difference.
Any clues? Is it possible to add users to SP2010 within an event handler?
Background: when I add a new row to a list (with an Email column), permissions are granted to the user with the specified email address - if that user doesn't exist I want to create it (again, for Forms Based Authentication)
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我从未做过任何共享点开发，但这听起来像是跨线程问题。该事件将创建一个新线程，该线程无法访问包含“会员资格”的线程。尝试使用委托传递它？
例如
Im have never done any share point development but it sounds like a cross thread problem.. The event will create a new thread which wont have acces to the thread that contains 'Membership'. try passing it through using a delegate?
eg
在我看来，你的 httpcontext.current 为空。至少我遇到了同样的问题，这就是原因。
检查这个http://kbochevski.blogspot.com/2011/01 /accessing-membership-database-inside.html
我希望它可能有帮助
It seems to me that your httpcontext.current is null. At least i had the same problem and that was the reason.
Check this http://kbochevski.blogspot.com/2011/01/accessing-membership-database-inside.html
I hope it may be of help