有一个名为"test.html"的HTML文件和两个链接。此 HTML 文件按geckoWebBrowser1显示，如下所示：
<!DOCTYPE html>
<html>
<head lang="tr">
<meta charset="UTF-8">
<title>Test HTML</title>
</head>
<body>
<p><a href="#" id="open_file" class="open-file button" onclick="openFile()">Open A PDF file...</a></p>
<p><a href="#" id="go_to_articles" class="go-to-articles button" onclick="goToArticles()">Go to articles...</a></p>
</body>
<script>
function openFile()
{
// What should I write here?
}
function goToArticles()
{
// What should I write here?
}
</script>
</html>
以下是 winforms 内容：
using System;
using System.Windows.Forms;
using Gecko;
namespace Test
{
public partial class Frm1 : Form
{
public Frm1()
{
InitializeComponent();
Xpcom.Initialize("Firefox64");
}
private void Frm1_Load(object sender, EventArgs e)
{
FormBorderStyle = FormBorderStyle.None;
geckoWebBrowser1.Navigate("start\test.html");
}
public void OpenPDFFile()
{
var ofd = new OpenFileDialog { Filter = @"PDF |*.pdf", Title = @"Select a PDF file..." };
if (ofd.ShowDialog() == DialogResult.OK)
{
// Here, action will be taken regarding the selected file.
}
}
}
}
当我单击 HTML 文件中的Open A PDF file ...链接时，必须在 WinForms 中触发OpenPDFFile方法，并从对话框中选择 PDF 文件，但我无法这样做。然而，我希望通过单击HTML文件中的Go to articles ...链接来查看位于Winforms中的"FrmArticles"表单，但到目前为止我无法实现它。
它源自GeckoFX问题中"AddMessageEventListener"中的错误的答案。
<!DOCTYPE html>
<html>
<head lang="tr">
<meta charset="UTF-8">
<title>Test HTML</title>
</head>
<body>
<p><a href="#" id="open_file" class="open-file button" onclick="fireEvent('openFiles', 'SomeData');">Open A PDF file...</a></p>
<p><a href="#" id="go_to_articles" class="go-to-articles button" onclick="goToArticles()">Go to articles...</a></p>
</body>
<script>
function fireEvent(name, data)
{
var event = new MessageEvent(name,{'view': window, 'bubbles': false, 'cancelable': true, 'data': data});
document.dispatchEvent(event);
}
</script>
</html>
Form.cs内容，
using System;
using System.Windows.Forms;
using Gecko;
namespace Test
{
public partial class Frm1 : Form
{
public Frm1()
{
InitializeComponent();
Xpcom.Initialize("Firefox64");
}
private void Frm1_Load(object sender, EventArgs e)
{
FormBorderStyle = FormBorderStyle.None;
geckoWebBrowser1.Navigate("start\test.html");
AddMessageEventListener("openFiles", showMessage);
}
public void AddMessageEventListener(string eventName, Action<string> action)
{
geckoWebBrowser1.AddMessageEventListener(eventName, action);
}
private void showMessage(string s)
{
var ofd = new OpenFileDialog { Filter = @"PDF |*.pdf", Title = @"Select a PDF file..." };
if (ofd.ShowDialog() == DialogResult.OK)
{
MessageBox.Show(ofd.FileName);
}
}
}
}
在示例中，如果需要，可以使用字符串"SomeData"作为参数。