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;
}
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"
的含义和用法