CefWebBrowser没有出现

时间:2013-01-18 06:07:59

标签: c# winforms webbrowser-control chromium chromium-embedded

解决方案:

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。

然后如果你的CefWebBrowser卡住并且“旋转等待鼠标光标”,那么设置SingleProcess = true。

原因是如果从识别的辅助进程调用浏览器,整个进程将被阻止,直到进程结束。


问题:

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

这个组件折磨了我一整天。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。 我似乎是唯一一个不知道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.

来源: Xilium.CefGlue

堆栈追踪:

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;
        }

4 个答案:

答案 0 :(得分:5)

您不应该使用SingleProcess进行生产,实际上您可以离开多进程模式(SingleProcess=false)但需要disable Visual Studio Hosting Process并且您不会遇到调试问题(旋转等待光标)

答案 1 :(得分:4)

我在启动浏览器时也遇到了问题。我可以加载所有CEF DLL,但浏览器不会显示!我得到的只是悬停在控件上方的旋转等待鼠标光标。

不幸的是我没有找到问题的根源,但是由于示例项目CefGlue.Client正常工作,我只是将其复制到我的解决方案中。

另外,我没有看到你是如何初始化CEF运行时的。看看CefGlue.Client中的Program.cs是如何完成的,但基本上就是这样:

    [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;
    }

答案 2 :(得分:1)

您从未将控件添加到窗体的控件集合中,至少在您显示的示例中。

答案 3 :(得分:1)

我也有同样的问题,我通过修改" BrowserSubprocessPath"解决了这个问题,defualt是这样的:

        //var browserProcessPath = CombinePaths(localFolder, "..", "..", "..",
        //    "CefGlue.Demo.WinForms", "bin", "Release", "Xilium.CefGlue.Demo.WinForms.exe");

        var browserProcessPath = CombinePaths(localFolder, "Xilium.CefGlue.Demo.WinForms.exe");

        var settings = new CefSettings
        {
            BrowserSubprocessPath = browserProcessPath,
            SingleProcess = false,
            MultiThreadedMessageLoop = true,
            LogSeverity = CefLogSeverity.Disable,
            LogFile = "CefGlue.log",
        };

因为我已经更改了应用程序输出目录,所以" browserProcessPath"无效,然后我修改" browserProcessPath"匹配输出目录,以便应用程序可以找到它。

但是,我仍然无法理解" browserProcessPath"

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