如何在webview2(c#/vb.net)中检测鼠标点击

c#

我尝试让事件点击 html 元素。使用我使用的 WebBrowser：

instance = Nothing
            instance = WebBrowser1.Document
            AddHandler instance.Click, AddressOf Document_Click

但是对于 Webview2，我没有找到好的做法。我必须注入一个 javascript 代码吗？但是，我如何在 C# 或 Vb.net 应用程序中获取处理程序？

非常感谢。

这里有一个示例代码。我的函数中没有返回值：WebView1_WebMessageReceived。为什么 ？我想，我忘记了什么......

Imports System.IO
Imports Microsoft.Web.WebView2.Core
Imports Newtonsoft.Json


    Class MainWindow
        Public Sub New()
    
            InitializeComponent()
            InitializeSyncroComponent()
    
            ' Ajoutez une initialisation quelconque après l'appel InitializeComponent().
    
        End Sub
    
        Structure JsonObject
            Public Key As String
            'Public Value As PointF
        End Structure
    
        Async Sub InitializeSyncroComponent()
            Await webview1.EnsureCoreWebView2Async
            webview1.CoreWebView2.Navigate("https://google.fr/")
        End Sub
    
        Private Sub WebView1_WebMessageReceived(ByVal sender As Object, ByVal e As Microsoft.Web.WebView2.Core.CoreWebView2WebMessageReceivedEventArgs)
            Dim jsonObject As JsonObject = JsonConvert.DeserializeObject(Of JsonObject)(e.WebMessageAsJson)
    
            Select Case jsonObject.Key
                Case "contextmenu"
                    'contextMenuStrip1.Show(Point.Truncate(jsonObject.Value))
                Case "mousedown"
                    Stop
                    ' contextMenuStrip1.Hide()
            End Select
        End Sub
    
        Private Sub webview1_NavigationCompleted(sender As Object, e As CoreWebView2NavigationCompletedEventArgs) Handles webview1.NavigationCompleted
            webview1.CoreWebView2.Settings.AreDefaultContextMenusEnabled = False
            Dim script As String = File.ReadAllText("d:test_mouse.js")
            webview1.CoreWebView2.AddScriptToExecuteOnDocumentCreatedAsync(script)
        End Sub
    End Class

脚本Java：

document.addEventListener('mousedown', function (event)
{
    let jsonObject =
    {
        Key: 'mousedown',
        Value:
        {
            X: event.screenX,
            Y: event.screenY
        }
    };
    window.chrome.webview.postMessage(jsonObject);
});

编辑：我发现了我的错误......真的不多！

我忘记了 webview 属性中 WebMessageReceived 的声明。

回答

using Microsoft.Web.WebView2.Core;
using Newtonsoft.Json;
using System.IO;
using System.Windows.Forms;

namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public struct JsonObject
        {
            public string Key;
            public string Value;
        }

        private async void WebView21_CoreWebView2InitializationCompleted(object sender, CoreWebView2InitializationCompletedEventArgs e)
        {
            string script = File.ReadAllText("Mouse.js");
            await webView21.CoreWebView2.AddScriptToExecuteOnDocumentCreatedAsync(script);
        }

        private void WebView21_WebMessageReceived(object sender, CoreWebView2WebMessageReceivedEventArgs e)
        {
            JsonObject jsonObject = JsonConvert.DeserializeObject<JsonObject>(e.WebMessageAsJson);
            switch (jsonObject.Key)
            {
                case "click":
                    MessageBox.Show(jsonObject.Value);
                    break;

            }
        }
    }
}

document.addEventListener('click', function (event)
{
    let elem = event.target;
    let jsonObject =
    {
        Key: 'click',
        Value: elem.name || elem.id || elem.tagName || "Unkown"
    };
    window.chrome.webview.postMessage(jsonObject);
});