C#利用CefSharp的ChromiumWebBrowser发起Post请求

public void Navigate(this IWebBrowser browser, string url, byte[] postDataBytes, string contentType)
{
    IFrame frame = browser.GetMainFrame();
    IRequest request = frame.CreateRequest();

    request.Url = url;
    request.Method = "POST";

    request.InitializePostData();
    var element = request.PostData.CreatePostDataElement();
    element.Bytes = postDataBytes;
    request.PostData.AddElement(element);

    NameValueCollection headers = new NameValueCollection();
    headers.Add("Content-Type", contentType );
    request.Headers = headers;

    frame.LoadRequest(request);
}