一、C#调用js
1.通过CefFrame.ExecuteJavaScript(string code, string url, int line)方法执行JS
private void browser_LoadEnd(object sender, Xilium.CefGlue.WPF.LoadEndEventArgs e)
{
browser.ExecuteJavaScript("window.iscef = true;", browser.GetCefBrowser().GetMainFrame().Url, );
}
2.通过CefV8Value.ExecuteFunction或CefV8Value.ExecuteFunctionWithContext执行
二、js调用C#
1.定义DemoRenderProcessHandler，继承自CefRenderProcessHandler，重写OnWebKitInitialized事件，根据实际情况，人工手写JS脚本代码，通过官方提供的RegisterExtension(string extensionName, string javascriptCode, CefV8Handler handler)方法进行注册：
public class DemoRenderProcessHandler : CefRenderProcessHandler
{
private TGCefV8Handler tgCefV8Handler;
protected override void OnWebKitInitialized()
{
tgCefV8Handler = new TGCefV8Handler(); const string exampleAJavascriptCode = @"function tgCefV8Handler() {}
if (!tgCefV8Handler) tgCefV8Handler = {};
(function() {
tgCefV8Handler.playMp3 = function(arg0) {
native function PlayMp3(arg0);
return PlayMp3(arg0);
};
})();"; CefRuntime.RegisterExtension("exampleAExtensionName", exampleAJavascriptCode, tgCefV8Handler); base.OnWebKitInitialized();
}
}
2.定义一个CefV8Handler，继承自CefV8Handler，在ExampleAv8Handler里的Execute事件中，写你要执行的操作代码，下面代码中的JSFunc.PlayMp3表示一个播放mp3的函数
public class TGCefV8Handler : CefV8Handler
{
/// <summary>
/// 默认构造函数
/// </summary>
public TGCefV8Handler()
{
} protected override bool Execute(string name, CefV8Value obj, CefV8Value[] arguments, out CefV8Value returnValue, out string exception)
{
string result = string.Empty; switch (name)
{
case "PlayMp3":
result = JSFunc.PlayMp3(arguments[].GetStringValue());
break;
default:
break;
} returnValue = CefV8Value.CreateString(result);
exception = null;
return true;
}
}
3.在CefApp中重写GetRenderProcessHandler方法：
internal sealed class SampleCefApp : CefApp
{
public SampleCefApp()
{
} private CefRenderProcessHandler _renderProcessHandler = new DemoRenderProcessHandler(); protected override void OnBeforeCommandLineProcessing(string processType, CefCommandLine commandLine)
{
if (string.IsNullOrEmpty(processType))
{
commandLine.AppendSwitch("disable-gpu");
commandLine.AppendSwitch("disable-gpu-compositing");
commandLine.AppendSwitch("enable-begin-frame-scheduling");
commandLine.AppendSwitch("disable-smooth-scrolling");
}
} protected override CefRenderProcessHandler GetRenderProcessHandler()
{
return _renderProcessHandler;
}
}
4.最后在js中调用方式为：
var msg = window.tgCefV8Handler.playMp3(url);