c# - 如何知道WebBrowser 导航是否出现错误页面？

Question

例如，我们导航到http://www.ggg111.com ，这是一个错误的 URL。但在 WebBrowser 中它显示一个错误页面:

The webpage cannot be found  HTTP 400     Most likely causes:There might be a typing error in the address. If you clicked on a link, it may be out of date.    What you can try:      Retype the address.       Go back to the previous page.      Go to  and look for the information you want.  

如何知道浏览器浏览器是否浏览错误页面？

还要检查这个: https://sso.youshang.com/sso/userAuthnAction.do1

HTTP Status 404 - /sso/userAuthnAction.do1type Status reportmessage /sso/userAuthnAction.do1description The requested resource (/sso/userAuthnAction.do1) is not available.

Answer 1

基于此控件:http://www.codeproject.com/KB/cpp/ExtendedWebBrowser.aspx

有 NavigateError 函数，在导航过程中发生错误时触发。这是我修改后的代码:

首先添加事件参数类:

public class NavigateErrorArgs : EventArgs
{
    public object StatusCode { get; set; }

    public NavigateErrorArgs()
            : base()
    { }

    public NavigateErrorArgs(object statusCode)
            : base()
    {
       this.StatusCode = statusCode;
    }
}

然后在 ExtendedWebBrowser 类中添加委托(delegate)和事件:

public delegate void NavigateErrorHandler(object sender, NavigateErrorArgs e);
public event NavigateErrorHandler NavigateError;

protected void OnNavigateError(NavigateErrorArgs e)
{
  if (NavigateError != null)
      NavigateError(this, e);
}

and modify method in class WebBrowserExtendedEvents:

public void NavigateError(object pDisp, ref object URL, ref object frame, ref object statusCode, ref bool cancel)
{
    _Browser.OnNavigateError(new NavigateErrorArgs(statusCode));
}