我可以在Awesomium中调用JavaScript中的应用程序方法吗？ [英] Can I call application methods from JavaScript in Awesomium?

问题描述

我在互联网上寻找答案，但我一定是在问错误的问题。我有一个带有Awesomium网页控件的C＃winforms应用程序。我能够从加载的页面中的javascript调用应用程序中定义的方法吗？如果是这样，怎么样？ （样本js代码将不胜感激）。谢谢！

I've scoured the internet looking for an answer, but I must be asking the wrong question. I have a C# winforms app with an Awesomium web control. Am I able to call methods defined in the app from javascript in the page that loads? If so, how? (sample js code would be greatly appreciated). Thanks!

推荐答案

该方法取决于您使用的Awesomium版本。在即将发布的1.7版本（目前为1.7 RC3）中如何完成以及如何完成之前已经有了一些变化。请注意，1.7中有一个改进，因为当JS调用应用程序上的方法时，.NET方法现在可以返回值。我不认为在1.7之前这是可能的。

The approach depends on which version of Awesomium you're using. There's been a bit of a change of how this is done in the upcoming version 1.7 (currently at 1.7 RC3) and how it was done before. Note that there's one improvement in 1.7, in that .NET methods can now return values when JS calls a method on your app. I don't believe this was possible prior to 1.7.

以下是两种方法：

test。 html（用于两个版本）

test.html (used for both versions)

...
<script type="text/javascript">

    function myMethod() {
        document.write("In myMethod, calling .NET but expecting no return value.<br/>");

        jsobject.callNETNoReturn();
    }

    function myMethodExpectingReturn() {
        document.write("In myMethodExpectingReturn, calling .NET and expecting return value.<br/>");

        var returnVal2 = jsobject.callNETWithReturn("foo");
        document.write("Got value from .NET: " + returnVal2 + "<br/>");
    }

    function myMethodProvidingReturn(whatToReturn) {
        var returnVal =  whatToReturn + "bar";
        document.write("Returning '" + returnVal + "' to .NET.");

        return returnVal;
    }
</script>
...

版本1.7

Form1.cs

public Form1()
{
    InitializeComponent();

    //webView is an instance of WebControl defined in your form
    webView.DocumentReady += WebViewOnDocumentReady;

    webView.Source = new Uri("test.html");
}

private void WebViewOnDocumentReady(object sender, UrlEventArgs urlEventArgs)
{
    webView.DocumentReady -= WebViewOnDocumentReady;

    JSObject jsobject = webView.CreateGlobalJavascriptObject("jsobject");

    jsobject.Bind("callNETNoReturn", false, JSHandler);
    jsobject.Bind("callNETWithReturn", true, JSHandler);

    webView.ExecuteJavascript("myMethod()");
    webView.ExecuteJavascript("myMethodExpectingReturn()");
    var result = webView.ExecuteJavascriptWithResult("myMethodProvidingReturn('foo')");
    Console.WriteLine(result.ToString());
}

private void JSHandler(object sender, JavascriptMethodEventArgs args)
{
    if (args.MustReturnValue)
    {
        Console.WriteLine("Got method call with return request");
        args.Result = "Returning " + args.Arguments[0];
    }
    else
    {
        Console.WriteLine("Got method call with no return request");
    }
}

版本1.6

Form.cs

public Form1()
{
    InitializeComponent();

    //webView is an instance of WebControl defined in your form
    webView.DomReady += WebViewOnDomReady;

    webView.Source = new Uri("test.html");
}

private void WebViewOnDomReady(object sender, EventArgs eventArgs)
{
    webView.DomReady -= WebViewOnDomReady;

    webView.CreateObject("jsobject");
    webView.SetObjectCallback("jsobject", "callNETNoReturn", JSHandler);

    webView.ExecuteJavascript("myMethod()");

    var result = webView.ExecuteJavascriptWithResult("myMethodProvidingReturn('foo')");
    Console.WriteLine(result.ToString());
}

private void JSHandler(object sender, JSCallbackEventArgs args)
{
    Console.WriteLine("Got method call with no return request");
}

这篇关于我可以在Awesomium中调用JavaScript中的应用程序方法吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！