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
