LBo*_*rdt 3 c# webbrowser-control getelementbyid
在 WPF 应用程序中，我有一个名为 WebBrowser1 的网络浏览器。这是指包含用户可以输入文本的 TextArea 的 HTML 页面。
<html>
<body>
<textarea class="myStudentInput" id="myStudentInput1">
Text to be copied
</textarea>
</body>
</html>
我希望获得此文本并可能还设置此文本。
我尝试了类似于 javascript 编写方式的方法：
document.getElementById("myStudentOutput1").innerHTML;
如
HtmlElement textArea = webBrowser1.Document.All["myStudentInput1"];
dynamic textArea = WebBrowser1.Document.GetElementsByID("myStudentInput1").InnerText;
但它不起作用。
Visual Studio 2015 WPF 应用程序中的以下解决方案适用于我。
首先，添加对 Microsoft HTML COM 库的引用。这是在 COM 选项卡上，当您在项目中执行“添加引用”时。
然后添加代码：
<Window x:Class="WpfApplication3.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApplication3"
mc:Ignorable="d"
Title="MainWindow" Height="600" Width="800">
<Grid>
<WebBrowser x:Name="WebBrowser1" HorizontalAlignment="Left" Height="480" Margin="10,10,0,0" VerticalAlignment="Top" Width="770" Source="E:\Others\Dropbox\Programming\Questions.html"/>
<Button x:Name="mySetQuestionButton" Content="Set Question" HorizontalAlignment="Left" Margin="200,520,0,0" VerticalAlignment="Top" Width="75" Click="mySetQuestion"/>
<Button x:Name="myGetAnswerButton" Content="Get Answer" HorizontalAlignment="Left" Margin="350,520,0,0" VerticalAlignment="Top" Width="75" Click="myGetAnswer"/>
<TextBlock x:Name="textBlock" HorizontalAlignment="Left" Margin="600,520,0,0" TextWrapping="Wrap" Text="Hello2" VerticalAlignment="Top"/>
</Grid>
</Window>
和
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace WpfApplication3
{
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void mySetQuestion(object sender, EventArgs e)
{
mshtml.HTMLDocument document = (mshtml.HTMLDocument)WebBrowser1.Document;
mshtml.IHTMLElement textArea = document.getElementById("myQuestion1");
textArea.innerHTML = "What is 1+1?";
}
private void myGetAnswer(object sender, EventArgs e)
{
mshtml.HTMLDocument document = (mshtml.HTMLDocument)WebBrowser1.Document;
mshtml.IHTMLElement textArea = document.getElementById("myStudentInput1");
textBlock.Text = textArea.innerHTML;
}
}
}