如何在ASP.NET MVC Web应用程序中传递上下文

```csharp

// 获取属性值

string value = currentContext.Request.QueryString["key"];

// 设置属性值

currentContext.Request.QueryString["key"] = "newValue";

```

```csharp

public class RequestContextFilter : ActionFilterAttribute

{

    public override void OnActionExecuting(ActionExecutingContext filterContext)

    {

        filterContext.HttpContext.Request.EnableBuffering();

        base.OnActionExecuting(filterContext);

    }

}

```csharp

filterContext.Controller.ViewContext.HttpContext.Request.EnableBuffering();

```

```csharp

// 创建一个缓存管理类

IDisposable cache = new MemoryCache("cache");

ICachePolicy policy = new CachePolicy(cache);

// 创建一个SessionProvider

SessionManager sessionManager = new SessionManager(policy);

// 在controller创建上下文时传入SessionManager

ControllerContext context = new ControllerContext(filterContext.HttpContext, filterContext.RouteData, filterContext.Controller);

context.HttpContext.Session = sessionManager;

```