如何从 C# 调用 JavaScript - Cordova/PhoneGap [英] How to call JavaScript from C# - Cordova/PhoneGap

问题描述

我正在使用cordova/phonegap 来制作一个Windows 手机应用程序，当一个事件触发时，我试图从C# 调用一个脚本.

I'm using cordova/phonegap to make a windows phone app, i'm trying to call a script from C# when an event fires.

有没有办法做到这一点?

Is there anyway to do this?

这是我目前的课程.

public void register(string options)
{
        // This is executed asynchronously
        if (!TryFindChannel())
            DoConnect();
}


void httpChannel_ChannelUriUpdated(object sender, NotificationChannelUriEventArgs e)
{
        // Finished asynchronous task in "register" method
        Trace("Channel opened. Got Uri:
" + httpChannel.ChannelUri.ToString());
        SaveChannelInfo();

        Trace("Subscribing to channel events");
        SubscribeToService();
        SubscribeToNotifications();

        // SEND CHANNEL URI TO JAVASCRIPT

}

推荐答案

我找到了一个解决方案，虽然不是最好的，但对我有用.

I found a solution, admittedly not the best one but works for me.

我创建了一个名为 WebViewHandler 的单例类，它看起来像这样

I created a singleton class called WebViewHandler which looks like this

class WebViewHandler
{
    private static WebViewHandler instance;
    public bool isWebViewReady { get { return webView != null; } }
    public WPCordovaClassLib.CordovaView webView;

    private WebViewHandler()
    {

    }

    public void setWebView(ref WPCordovaClassLib.CordovaView webView)
    {
        this.webView = webView;
    }

    public static WebViewHandler getInstance()
    {
        if(instance == null){
            instance = new WebViewHandler();
        }
        return instance;
    } 
}

然后我在 HomePage 的构造函数中设置 webview，如下所示:

Then I set the webview in the constructor on the HomePage like so:

 public HomePage()
 {
      InitializeComponent();
      CordovaView.Loaded += CordovaView_Loaded;
      WebViewHandler.getInstance().setWebView(ref CordovaView); 
 }

一旦设置了 WebView，我就可以从任何其他类调用 InvokeScript:

Once the WebView is set I can then call InvokeScript from any other class:

WebViewHandler.getInstance().webView.CordovaBrowser.InvokeScript("MyJavaScriptFunctionThatIWishToCall");

这篇关于如何从 C# 调用 JavaScript - Cordova/PhoneGap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！