C# Geckofx22如何在导航事件中获取POST数据

我试图从浏览器将要导航到的页面获取POST数据，进行一些处理并重新发布/重定向它

private void webBrowser_Navigating(object sender, Gecko.Events.GeckoNavigatingEventArgs e)
{
//how get POST data ??
}

GeckoNavigatingEventArgs have no POST data property

 public class GeckoNavigatingEventArgs : CancelEventArgs
    {
        public readonly GeckoWindow DomWindow;
        public readonly bool DomWindowTopLevel;
        public readonly Uri Uri;

        public GeckoNavigatingEventArgs(Uri value, GeckoWindow domWind);
    }

我在过去的csEXWB控件中使用了“public object postdata；”在他之前的航行中

不幸的是，csEXWB太老了，不能使用

先谢谢你

编辑：我找到了

Gecko.DOM.GeckoInputElement element = (Gecko.DOM.GeckoInputElement)this.geckoBrowser.Document.GetHtmlElementById("amount");
            string amount = element.DefaultValue;