Asp.net 在 Application_BeginRequest 中设置会话变量

发布于05月12日

我在用ASP.NET MVC和我需要将会话变量设置为Application_BeginRequest.问题是，在这一点上，对象HttpContext.Current.Session始终是null.

protected void Application_BeginRequest(Object sender, EventArgs e)
{
    if (HttpContext.Current.Session != null)
    {
        //this code is never executed, current session is always null
        HttpContext.Current.Session.Add("__MySessionVariable", new object());
    }
}

推荐答案

在Global.asax中try AcquireRequestState.会话在此事件中可用，该事件 for each 请求触发:

void Application_AcquireRequestState(object sender, EventArgs e)
{
    // Session is Available here
    HttpContext context = HttpContext.Current;
    context.Session["foo"] = "foo";
}

Valamas - Suggested Edit:

成功地将其与MVC 3一起使用，避免了会话错误.

protected void Application_AcquireRequestState(object sender, EventArgs e)
{
    HttpContext context = HttpContext.Current;
    if (context != null && context.Session != null)
    {
        context.Session["foo"] = "foo";
    }
}