你可以在 IQueryCollection 上使用ToString方法，如果指定了一个 page 参数，它将返回所需的值：

You could use the ToString method on IQueryCollection which will return the desired value if a single page parameter is specified:

string page = HttpContext.Request.Query["page"].ToString();

如果有多个值，例如？page = 1& page = 2 然后ToString调用的结果将是 1,2

if there are multiple values like ?page=1&page=2 then the result of the ToString call will be 1,2

但是作为@mike -g在他的回答中建议你***使用模型绑定而不是直接访问 HttpContext.Request.Query 对象。

But as @mike-g suggested in his answer you would better use model binding and not directly accessing the HttpContext.Request.Query object.