运行时出现“无法将类型为“System.EventArgs”的对象强制转换为类型“Wuqi.Webdiyer.PageChangingEventArgs”

public void AspNetPager1_PageChanged(object src, Wuqi.Webdiyer.PageChangingEventArgs e)
    {
        AspNetPager1.CurrentPageIndex = e.NewPageIndex;
//AspNetPager1.CurrentPageIndex = ((Wuqi.Webdiyer.PageChangingEventArgs) e).NewPageIndex;