How to view/download pdf in .Net Maui?

Question

I need to view and download the pdf file in my MAUI application.

Target platform - Android

Answer 1

Hello,

I want to load the pdf by url.

You can use webview to view the pdf.

<WebView x:Name="webView" WidthRequest="500" HeightRequest="500"/>

Then, you can set the webviewsource wiht google docs url and your pdf url.

webView.Source = "https://docs.google.com/viewer?url=http://yourpdfurl.pdf";

Next, please enable javascript for your webview. After that, you can load the pdf by url in the android.

  Microsoft.Maui.Handlers.WebViewHandler.Mapper.AppendToMapping("MyCustomization", (handler, view) =>
            {
#if ANDROID
                handler.PlatformView.Settings.JavaScriptEnabled=true;

#endif
            });

I need simple code.

=======================Update========================= If you want to download pdf file to the external download folder, you can use ContentResolver to save it.

Here are code about downloading pdf file by HttpContent.ReadAsStreamAsync and save pdf file to the external download folder.

 private async void Button_Clicked(object sender, EventArgs e)
        {


           string url = "https://www.africau.edu/images/default/sample.pdf";
            //your stored pdf path
            string fileName = FileSystem.Current.AppDataDirectory + "Temp.pdf";
            using (var client = new HttpClient())
            {
                var response = await client.GetAsync(url);
                if (response.IsSuccessStatusCode)
                {
                    //If we get the success status code, we can download it to the app data directory.
                    var stream = await response.Content.ReadAsStreamAsync();
                   

#if ANDROID
                        ContentResolver resolver = Microsoft.Maui.ApplicationModel.Platform.CurrentActivity.ContentResolver;
                        ContentValues contentValues = new ContentValues();
                        contentValues.Put(MediaStore.IMediaColumns.DisplayName, "Temp.pdf");
                        contentValues.Put(MediaStore.IMediaColumns.MimeType, "application/pdf");
                        contentValues.Put(MediaStore.IMediaColumns.RelativePath, Android.OS.Environment.DirectoryDownloads);
                        Android.Net.Uri uri = resolver.Insert(MediaStore.Downloads.ExternalContentUri, contentValues);
                        Stream outputStream = resolver.OpenOutputStream(uri);
                        await stream.CopyToAsync(outputStream);
#endif


                   
                }
                else
                {
                    throw new Exception("File not found");
                }
            }


          
        }

Do not forget to add these references for android platform.

#if ANDROID
using Android.Content;


using Android.Provider;


#endif

Best Regards,

Leon Lu

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