WPF/WebBrowser - 没有重载匹配委托

Question

我试图在网络浏览器 (WPF) 中突出显示一些文本。不幸的是，我无法摆脱以下错误：

'Browser_LoadCompleted' 没有重载匹配委托 'LoadCompletedEventHandler'

这一行有红色下划线 -> StringBuilder html = new StringBuilder(doc2.body.outerHTML);

感谢任何帮助。谢谢。

using mshtml;
using System;
using System.Text;
using System.Windows.Controls;
using System.Windows.Navigation;

namespace LSS_doc.Views
{
    /// <summary>
    /// Interaction logic for ViewTabView.xaml
    /// </summary>
    public partial class ViewTabView : UserControl
    {

        public ViewTabView()
        {
            InitializeComponent();
            WebBrowser browser = new WebBrowser();
            browser.LoadCompleted += Browser_LoadCompleted;
        }


        public void Browser_LoadCompleted(object sender, LoadCompletedEventHandler e)
        {
            IHTMLDocument2 doc2 = browser.Document as IHTMLDocument2;
            StringBuilder html = new StringBuilder(doc2.body.outerHTML);

            var words = new[] { "word", "word2" };
            foreach (String key in words)
            {
                String substitution = "<span style='background-color: rgb(255, 255, 0);'>" + key + "</span>";
                html.Replace(key, substitution);
            }

            doc2.body.innerHTML = html.ToString();
        }
    }
}

Answer 1

您的事件处理程序定义错误。

查看MSDN LoadCompletedEventHandler which is what the WebBrowser Control's LoadCompleted事件使用，需要使用NavigationEventArgs。

public void Browser_LoadCompleted(object sender, NavigationEventArgs e)
{
    ...
}

关于你关于 StringBuilder 的红线，我恳请你实际查看错误，查看 constructor options，并验证你传递的内容。

WPF/WebBrowser - 没有重载匹配委托

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c#

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