CefWebBrowser没有出现

Question

解:

此问题是由于未在Program.cs中加载CefRuntime引起的.只需将示例文件中的所有代码复制到Program.cs即可.

然后,如果您的CefWebBrowser卡住并且"旋转等待鼠标光标",则设置SingleProcess = true.

原因是如果从已识别的辅助进程调用浏览器,则整个进程将被阻止,直到进程结束.

---

题:

任何人都有在WinForm中使用CEF(Chromium Embedded Framework)的经验？

这个组件让我折磨了一整天.我不能让它发挥作用.它只是没有出现.

所以我的问题是:如何在WinForm应用程序中使用CEF？

我确实检查了论坛,但令人惊讶的是没有人问过这个问题.似乎我是唯一一个不懂如何使用它的愚蠢的人.

public partial class Form1 : Form
{
    private CefWebBrowser cefwbShell = null;
    //private readonly SynchronizationContext _pUIThread;

    private void Form1_Load(object sender, EventArgs e)
    {
        cefwbShell.Visible = true;
        cefwbShell = new CefWebBrowser { StartUrl = "http://example.com" };
        cefwbShell.Parent = this;
        cefwbShell.Dock = DockStyle.Fill;
        cefwbShell.BringToFront();
        cefwbShell.Show();
    }
}

更新:

我正在尝试使用Xilium.CefGlue.在我复制了版本dll(991)的正确版本后,我得到了一个例外:

InvalidOperationException was unhandlled by user code 
   Failed to create browser.

资源: Xilium.CefGlue

堆栈跟踪:

at Xilium.CefGlue.CefBrowserHost.CreateBrowser(CefWindowInfo windowInfo, CefClient client, CefBrowserSettings settings, String url) in C:\Winston\Knowledge\Projects\xilium-xilium.cefglue-61551ec98ad8\xilium-xilium.cefglue-61551ec98ad8\CefGlue\Classes.Proxies\CefBrowserHost.cs:line 37
   at Xilium.CefGlue.WindowsForms.CefWebBrowser.OnHandleCreated(EventArgs e) in C:\Winston\Knowledge\Projects\xilium-xilium.cefglue-61551ec98ad8\xilium-xilium.cefglue-61551ec98ad8\CefGlue.WindowsForms\CefWebBrowser.cs:line 71
   at System.Windows.Forms.Control.WmCreate(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.IntCreateWindowEx(Int32 dwExStyle, String lpszClassName, String lpszWindowName, Int32 style, Int32 x, Int32 y, Int32 width, Int32 height, HandleRef hWndParent, HandleRef hMenu, HandleRef hInst, Object pvParam)
   at System.Windows.Forms.UnsafeNativeMethods.CreateWindowEx(Int32 dwExStyle, String lpszClassName, String lpszWindowName, Int32 style, Int32 x, Int32 y, Int32 width, Int32 height, HandleRef hWndParent, HandleRef hMenu, HandleRef hInst, Object pvParam)
   at System.Windows.Forms.NativeWindow.CreateHandle(CreateParams cp)
   at System.Windows.Forms.Control.CreateHandle()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.SetVisibleCore(Boolean value)

有人可以帮我吗？

更新2:

private void Create()
        {
            var page = new TabPage("New Tab");
            page.Padding = new Padding(0, 0, 0, 0);

            var browser = new CefWebBrowser();
            browser.StartUrl = startUrl;
            browser.Dock = DockStyle.Fill;
            browser.TitleChanged += (s, e) =>
            {
                BeginInvoke(new Action(() =>
                {
                    var title = browser.Title;
                    if (tabControl.SelectedTab == page)
                    {
                        Text = browser.Title + " - " + _mainTitle;
                    }
                    page.ToolTipText = title;
                    if (title.Length > 18)
                    {
                        title = title.Substring(0, 18) + "...";
                    }
                    page.Text = title;
                }));
            };
            browser.AddressChanged += (s, e) =>
            {
                BeginInvoke(new Action(() =>
                {
                    addressTextBox.Text = browser.Address;
                }));
            };
            browser.StatusMessage += (s, e) =>
            {
                BeginInvoke(new Action(() =>
                {
                    statusLabel.Text = e.Value;
                }));
            };

            page.Controls.Add(browser);

            tabControl.TabPages.Add(page);

            tabControl.SelectedTab = page;
        }

Answer 1

你不应该SingleProcess用于生产,你可以实际离开多进程模式(SingleProcess=false)但需要禁用Visual Studio Hosting Process,你不会有调试问题(旋转等待光标)

Answer 2

我启动浏览器时也遇到问题。我可以加载所有 CEF DLL，但浏览器不会显示！当鼠标悬停在控件上方时，我得到的只是旋转的等待鼠标光标。

不幸的是，我还没有找到问题的根源，但由于示例项目 CefGlue.Client 可以工作，我只是将其复制到我的解决方案中。

另外，我不明白你是如何初始化 CEF 运行时的。看看 CefGlue.Client 中的 Program.cs 是如何完成的，但基本上是这样的：

    [STAThread]
    private static int Main(string[] args)
    {
        try
        {
            CefRuntime.Load();
        }
        catch (DllNotFoundException ex)
        {
            MessageBox.Show(ex.Message, "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
            return 1;
        }
        catch (CefRuntimeException ex)
        {
            MessageBox.Show(ex.Message, "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
            return 2;
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString(), "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
            return 3;
        }

        var mainArgs = new CefMainArgs(args);
        var app = new DemoApp();

        var exitCode = CefRuntime.ExecuteProcess(mainArgs, app);
        if (exitCode != -1)
            return exitCode;

        var settings = new CefSettings
            {
                // BrowserSubprocessPath = @"D:\fddima\Projects\Xilium\Xilium.CefGlue\CefGlue.Demo\bin\Release\Xilium.CefGlue.Demo.exe",
                SingleProcess = false,
                MultiThreadedMessageLoop = true,
                LogSeverity = CefLogSeverity.Disable,
                LogFile = "CefGlue.log",
            };

        CefRuntime.Initialize(mainArgs, settings, app);

        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);

        if (!settings.MultiThreadedMessageLoop)
        {
            Application.Idle += (sender, e) => { CefRuntime.DoMessageLoopWork(); };
        }

        Application.Run(new MainForm());

        CefRuntime.Shutdown();
        return 0;
    }