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cefsharp子进程退出或崩溃时的事件或通知

cefsharp events wpf .net c#

Ernie S · 技术社区 · 7 年前

拥有一个wpf客户端,它使用最新的cefsharp包来托管web应用程序。因为我们有多个web应用程序,所以我们有多个视图,每个视图都有自己的browser/browsersubprocess实例。

比如说,如果没有一个更好的例子,我就简单地进入任务管理器,杀死其中一个子进程.exe。有没有一个事件我们可以访问或者被通知?

有一种想法是通过某种类型的pQueKK来查询这个过程,但这是我宁愿不打开的蠕虫。

1 回复 | 直到 7 年前

Ernie S 7 年前

感谢@amaitland指引我正确的方向。大海捞针,但它就在那儿。

对于任何感兴趣的人,你必须实施 IRequestHandler 他在上面的评论中提到了这一点。你也可以

从头开始,
使用他们在 Example RequestHandler ,
或者在两者之间做点什么 DefaultRequestHandler ( DefaultRequestHandler Override Example )

所以如果我们使用 DefaultRequestHandler 我们可以做这样的事情,只是终止事件:

/// <summary>
/// Handle events related to browser requests.
/// </summary>
public class RequestHandler : DefaultRequestHandler
{
    /// <summary>
    /// Called when the render process terminates unexpectedly.
    /// </summary>
    /// <param name="browserControl">The ChromiumWebBrowser control</param>
    /// <param name="browser">the browser object</param>
    /// <param name="status">indicates how the process terminated.</param>
    /// <remarks>
    /// Remember that <see cref="browserControl"/> is likely on a different thread so care should be used
    /// when accessing its properties.
    /// </remarks>
    public override void OnRenderProcessTerminated(IWebBrowser browserControl, IBrowser browser, CefTerminationStatus status)
    {
        switch (status)
        {
            case CefTerminationStatus.AbnormalTermination:
                Log.Error("Browser terminated abnormally.");
                break;

            case CefTerminationStatus.ProcessWasKilled:
                Log.Error("Browser was killed.");
                break;

            case CefTerminationStatus.ProcessCrashed:
                Log.Error("Browser crashed while.");
                break;

            default:
                Log.Error($"Browser terminated with unhandled status '{status}' while at address.");
                break;
        }

        RenderProcessTerminated?.Invoke(browserControl, status);
    }

    /// <summary>
    /// Fires when the render process terminates unexpectedly.
    /// </summary>
    public event EventHandler<CefTerminationStatus> RenderProcessTerminated;
}

如果我们在视图中声明了一个浏览器对象,比如说:

<!--Bound to the ViewModel.Address property-->
<cef:ChromiumWebBrowser
    x:Name="Browser"
    Address="{Binding Address}">
</cef:ChromiumWebBrowser>

然后连接一个新实例:

private readonly Dispatcher _mainDispatcher;
private readonly RequestHandler _requestHandler = new RequestHandler();

public MainWindow()
{
    InitializeComponent();

    _mainDispatcher = Dispatcher.CurrentDispatcher;
    _requestHandler.RenderProcessTerminated += OnBrowserRenderProcessTerminated;
    Browser.RequestHandler = _requestHandler;
}

private void OnBrowserRenderProcessTerminated(object sender, CefTerminationStatus e)
{
    //Likely coming from a background thread
    _mainDispatcher.InvokeAsync(() =>
        Log.Error($"Browser crashed while at address: {Browser.Address}")
    );
}