C# CefSharp 新版本(83 以后版本) 如何在js中直接调用c#类
最近发现升级 CefSharp 到最新版本(86.0.241)后无法使用JS直接调用C#类了
以前使用的83.4.20版本,直接使用Register注册,就可以在JS中使用注册名 "callbackObj" 直接调用到注册的C#类
具体代码:
private readonly ChromiumWebBrowser _browser; public MainForm() { InitializeComponent(); _browser = new ChromiumWebBrowser(URL) { Dock = DockStyle.Fill, }; this.Controls.Add(browser); CallbackObjectForJs callbackObjectForJs = new CallbackObjectForJs(); CefSharpSettings.LegacyJavascriptBindingEnabled = true; CefSharpSettings.WcfEnabled = true; //注册 _browser.JavascriptObjectRepository.Register("callbackObj", callbackObjectForJs, isAsync: false, options: BindingOptions.DefaultBinder); // 按F12显示调试工具 _browser.KeyboardHandler = new CEFKeyBoardHander(); } /// <summary> /// JS回调类 /// </summary> [ComVisible(true)] public class CallbackObjectForJs { public void Test() { Thread th = new Thread(() => { MessageBox.Show("Test"); }); th.SetApartmentState(ApartmentState.STA); th.Start(); } }
JS代码
<!DOCTYPE html> <html lang="en" xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8" /> <title></title> </head> <body> hello word!!! <button id="btnTest" onclick="btnTest()">测试</button> <script type="text/javascript"> function btnTest() { callbackObj.test(); //注意 C#中的类的方法开头字母会变小写 } </script> </body> </html>
84以后的版本注册后想要在js中使用callbackObjectForJs类中的方法,需要先在js中调用
CefSharp.BindObjectAsync('callbackObj');
具体代码:
<!DOCTYPE html> <html lang="en" xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8" /> <title></title> </head> <body> hello word!!! <button id="btnTest" onclick="btnTest()">测试</button> <script type="text/javascript"> function btnTest() { CefSharp.BindObjectAsync('callbackObj'); callbackObj.test(); //注意 C#中的类的方法开头字母会变小写 } </script> </body> </html>
为了不在每个html界面都写bind,可以把BindObjectAsync 写到browser的加载完成事件FrameLoadEnd事件中,
具体代码:
public MainForm() { InitializeComponent(); _browser = new ChromiumWebBrowser(URL) { Dock = DockStyle.Fill, }; this.Controls.Add(browser); CallbackObjectForJs callbackObjectForJs = new CallbackObjectForJs(); CefSharpSettings.LegacyJavascriptBindingEnabled = true; CefSharpSettings.WcfEnabled = true; //注册 _browser.JavascriptObjectRepository.Register("callbackObj", callbackObjectForJs, isAsync: false, options: BindingOptions.DefaultBinder); //加载完成事件 browser.FrameLoadEnd += (t, s) => { StringBuilder sb = new StringBuilder(); sb.Append("(function(){") .Append("CefSharp.BindObjectAsync('callbackObj');") .Append("})();"); browser.GetFocusedFrame().EvaluateScriptAsync(sb.ToString()); }; // 按F12显示调试工具 _browser.KeyboardHandler = new CEFKeyBoardHander(); }
这样就可以在JS中继续使用callbackObj回调了
注意:经测试仍然不行,继续使用 83.4.20 版本了
原文:https://blog.csdn.net/txg1369540047/article/details/110645737