Question

我正在研究Xamarin Forms - UWP。我想在webview控件中显示本地PDF文件。我按照这两个链接： - https://developer.xamarin.com/recipes/cross-platform/xamarin-forms/controls/display-pdf/

Xamarin Forms UWP - Display PDF

它会打开pdf文件，但内容全部为空白。任何人都可以帮助我解决我可能缺少的事情吗？

提前致谢！

这是我的代码： - CustomWebView.cs

public class CustomWebView : WebView
    {
        public static readonly BindableProperty UriProperty = BindableProperty.Create(propertyName: "Uri",
                returnType: typeof(string),
                declaringType: typeof(CustomWebView),
                defaultValue: default(string));

        public string Uri
        {
            get { return (string)GetValue(UriProperty); }
            set { SetValue(UriProperty, value); }
        }
    }


<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
         xmlns:local="clr-namespace:PdfViewer;assembly=PdfViewer"
         x:Class="PdfViewer.MainPage"
         Padding="0,20,0,0">

<ContentPage.Content>
    <local:CustomWebView Uri="samplepdf.pdf" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" />
</ContentPage.Content>

[assembly: ExportRenderer(typeof(PdfViewer.CustomWebView), typeof(CustomWebViewRenderer))]
namespace PdfViewer.UWP
{
    public class CustomWebViewRenderer : WebViewRenderer
    {
        protected override void OnElementChanged(ElementChangedEventArgs<WebView> e)
        {
            base.OnElementChanged(e);

            if (e.NewElement != null)
            {
                var customWebView = Element as CustomWebView;
                Control.Source = new Uri(string.Format("ms-appx-web:///Assets/pdfjs/web/viewer.html?file={0}", string.Format("ms-appx-web:///Assets/Content/{0}", WebUtility.UrlEncode(customWebView.Uri))));
            }
        }
    }
}

UWP - Assets - pdfjs structure

Answer 1

看起来资产文件夹文件发生了什么。什么时候从nuget存储库更新了它。

在webview控件中显示本地PDF文件 - 显示空白Pdf文件

1 个答案: