使用 Microsoft Webview2 控件将 PDF 绘制到 WPF 应用程序中

Draw on a PDF into a WPF applicartion using Microsoft Webview2 control

我正在开发一个 WPF 应用程序,我想在其中打开并绘制成 pdf。
我可以在 webview2 控件中打开 pdf,但无法“绘制到 pdf 中” (如果我通过 Microsoft Edge 打开此 pdf 是可能的)

有没有人idea/hint/suggestion为什么在我编译代码时绘图功能disabled/not处于活动状态?

Desired Output

Output

已用资源: Get started with WebView2 in WPF

Using the WebView2 control in a .Net application

**Installed versions:**
[Introduction to Microsoft Edge WebView2][1]
[Using the WebView2 control in a .Net application][2]
Installed version of Microsoft.Web.WebView2: 1.0.902.49
Installed version of Microsoft Edge: 92.0.902.67
Installed version of Microsoft Edge WebView2-Runtime: 92.0.902.67 
Target Framework: .NET Framework 4.7.2
Visual Studio 2019





    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;
    using Microsoft.Web.WebView2.Core;
    
    namespace SwissSonic.Pages
    {
        /// <summary>
        /// Interaction logic for Change_drawing.xaml
        /// </summary>
        public partial class Change_drawing : Page
        {
            private MainWindow mainWindow;
    
            public Change_drawing(MainWindow main)
            {
                InitializeComponent();
                InitializeAsync();
                mainWindow = main;
                mainWindow.Button_Click_Zeichnung.Click += Button_Click_Zeichnung;
            }
    
            async void InitializeAsync()
            {
                await webView1.EnsureCoreWebView2Async(null);
            }
    
            private void Button_Click_Zeichnung(object sender, RoutedEventArgs e)
            {
                webView1.CoreWebView2.Settings.IsStatusBarEnabled = true;
                webView1.CoreWebView2.Settings.AreDefaultContextMenusEnabled = true;
                webView1.CoreWebView2.Settings.IsScriptEnabled = true;
                webView1.CoreWebView2.Settings.IsStatusBarEnabled = true; 
    
               
                string test = @"file:\\C:\TestPDF\mcdonalds_in_india.pdf";
                //string test = @"https://www.stadlerrail.com/media/pdf/web_stadler_rail_gb20_de.pdf";
                //  webView1.Source = new Uri(test);
                  webView1.CoreWebView2.Navigate(test);   
    
            }
            
        }          
    
    }


<Page x:Class="SwissSonic.Pages.Change_drawing"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      xmlns:local="clr-namespace:SwissSonic.Pages"
      xmlns:wv2="clr-namespace:Microsoft.Web.WebView2.Wpf;assembly=Microsoft.Web.WebView2.Wpf"
      mc:Ignorable="d" 
      d:DesignHeight="450" d:DesignWidth="800"
      Title="Change_drawing"> 
          
    
    
    <Grid Background="Red">

        <Grid.RowDefinitions>
            <RowDefinition Height="35"/>
            <RowDefinition Height="*"/>
            <RowDefinition/>
        </Grid.RowDefinitions>


        <wv2:WebView2  Name="webView1" Grid.Column="0" Grid.ColumnSpan="3" Grid.Row="0" Grid.RowSpan="3"/>        
   
    </Grid>
</Page>

我可以使用最新版本的 WebView2 重现该问题。我认为 the resource link you provide 中的屏幕截图来自以前版本的 WebView2。在当前版本的 WebView2 中,绘图、突出显示和擦除似乎被禁用。

我唯一能找到的相关 API 是 pdf 工具栏中的 HiddenPdfToolbarItems which is added in the latest WebView2 prerelease. But this API can only hide/show these buttons

我认为我们不能使用代码来制作绘图、突出显示和擦除显示,因为没有相关的API。您可以提供有关此问题的反馈 here。我想 Edge WebView 团队会检查并回复。