从js或aspx调用泛型处理程序

Question

我有通用处理程序，它定义为

public class ExporterHandler<TFactory, TRequest, TResult>

如果我直接称之为

window.open('/url/ExporterHandler.ashx')

当然我收到错误

有没有办法通过js或c＃传递通用参数？

目前的实现相当骇人听闻。

protected void Button_Download_Click(object sender, EventArgs e)
{
    var type = this.Page.GetType();
    while (!type.IsGenericType)
    {
        type = type.BaseType;
    }

    var pageArguments = type.GetGenericArguments();

    var handlerType = Assembly.GetExecutingAssembly()
        .GetTypes()
        .Where(x => x.FullName.Contains("ExporterHandler"))
        .Single()
        .MakeGenericType(pageArguments);

    var handler = (IHttpHandler)Activator.CreateInstance(handlerType);

    handler.ProcessRequest(this.Context);
}