如何在Event Handler中获取HttpContext

我试图在 MOSS 文档库的事件处理程序中获取 HTTPContext，但我所拥有的只是 HTTPContext.Current 的空值，我在列表上执行相同的操作并返回 HTTPContext。有没有办法获取文档库中的HTTPContext来访问HTTPContext.Request方法？

感谢您的帮助

这是代码：

public class TestContextListItemEventReceiver : SPItemEventReceiver
{
    HttpContext current;
    static object obj;

    /// <summary>
    /// Initializes a new instance of the Microsoft.SharePoint.SPItemEventReceiver class.
    /// </summary>
    public TestContextListItemEventReceiver()
    {
        current = HttpContext.Current;
    }

    public override void ItemAdding(SPItemEventProperties properties)
    {
        obj = current;  
    }
}

步骤1 宣布：

    private HttpContext currentContext;
    static HttpContext _stCurrentContext;

Step 2

currentContext = HttpContext.Current;      // in constructor

Step3

public override void ItemAdding(SPItemEventProperties properties)
                 _stCurrentContext = currentContext;

Step 4

 public override void ItemAdded(SPItemEventProperties properties)
 if (_stCurrentContext.Request.Files[0].ContentLength > 0)
 HttpPostedFile uploadfile = _stCurrentContext.Request.Files[0];