【C#】用CefSharp.ChromiumWebBrowser做winform开发过程中遇到的一些坑

文章目录

• 使用键盘F5刷新、F12打开控制台
• 浏览器默认下载弹窗
• 禁用GPU配置
• 跨域问题

使用键盘F5刷新、F12打开控制台

public class CEFKeyBoardHander : IKeyboardHandler
{
    public bool OnKeyEvent(IWebBrowser browserControl, IBrowser browser, KeyType type, int windowsKeyCode, int nativeKeyCode, CefEventFlags modifiers, bool isSystemKey)
    {
        if (type == KeyType.KeyUp && Enum.IsDefined(typeof(Keys), windowsKeyCode))
        {
            var key = (Keys)windowsKeyCode;
            switch (key)
            {
                case Keys.F12:
                    browser.ShowDevTools();
                    break;
                case Keys.F5:
                    if (modifiers == CefEventFlags.ControlDown)
                    {
                        //MessageBox.Show("ctrl+f5");
                        browser.Reload(true); //强制忽略缓存
                    }
                    else
                    {
                        //MessageBox.Show("f5");
                        browser.Reload();
                    }
                    break;
            }
        }
        return false;
    }
    public bool OnPreKeyEvent(IWebBrowser browserControl, IBrowser browser, KeyType type, int windowsKeyCode, int nativeKeyCode, CefEventFlags modifiers, bool isSystemKey, ref bool isKeyboardShortcut)
    {
        return false;
    }
}

WebBrowser = new ChromiumWebBrowser();
this.Controls.Add(WebBrowser);
WebBrowser.KeyboardHandler = new CEFKeyBoardHander();

浏览器默认下载弹窗

public class CefDownloadHandler : IDownloadHandler
{
    public event EventHandler<DownloadItem> OnBeforeDownloadFired;
    public event EventHandler<DownloadItem> OnDownloadUpdatedFired;

    public bool CanDownload(IWebBrowser chromiumWebBrowser, IBrowser browser, string url, string requestMethod)
    {
        //可以支持全部，也可以根据配置去自定义支持的文件类型
        //return "xls|xlsx".Split('|').ToList().Contains(url.Substring(url.LastIndexOf(".") + 1).ToLower());
        return true;
    }

    public void OnBeforeDownload(IWebBrowser chromiumWebBrowser, IBrowser browser, DownloadItem downloadItem, IBeforeDownloadCallback callback)
    {
        OnBeforeDownloadFired?.Invoke(this, downloadItem);
        if (!callback.IsDisposed)
        {
            using (callback)
            {
                callback.Continue(downloadItem.SuggestedFileName, showDialog: true);
            }
        }
    }

    public void OnDownloadUpdated(IWebBrowser chromiumWebBrowser, IBrowser browser, DownloadItem downloadItem, IDownloadItemCallback callback)
    {
        OnDownloadUpdatedFired?.Invoke(this, downloadItem);
    }
}

WebBrowser = new ChromiumWebBrowser();
WebBrowser.DownloadHandler = new CefDownloadHandler();

禁用GPU配置

var setting = new CefSettings();
setting.CefCommandLineArgs.Add("disable-gpu", "1")

跨域问题

setting.CefCommandLineArgs.Add("--disable-web-security", "");

待续未完……