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app crash when open file pdf convert from doc

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143832 Apr 7,2019 06:32 AM UTC Apr 8,2019 11:22 AM UTC Xamarin.Forms 1
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Tags: PdfViewer
DUNG PHAM VAN
Asked On April 7, 2019 06:32 AM UTC

app crash when open file pdf convert from doc
 my code get from example:

 internal class GettingStartedViewModel: INotifyPropertyChanged
    {
      
        private Stream m_pdfDocumentStream;

        private string m_documentName;

        string filePath = string.Empty;

        public event PropertyChangedEventHandler PropertyChanged;

        public string DocumentName
        {
            get
            {
                return m_documentName;
            }
            set
            {
                m_documentName = value;
                //Getdata();
                //////PdfDocumentStream = typeof(App).GetTypeInfo().Assembly.GetManifestResourceStream(filePath + "Assets.57a3e4dd-3b40-4665-b55a-4b7419d08db6.pdf");
            }
        }

        private async Task<Stream> DownloadPdfStream(string URL)
        {
            HttpClient httpClient = new HttpClient();
            HttpResponseMessage response = await httpClient.GetAsync(URL);
            //Check whether redirection is needed
            if ((int)response.StatusCode == 302)
            {
                //The URL to redirect is in the header location of the response message
                HttpResponseMessage redirectedResponse = await httpClient.GetAsync(response.Headers.Location.AbsoluteUri);
                return await redirectedResponse.Content.ReadAsStreamAsync();
            }
            return await response.Content.ReadAsStreamAsync();
        }
        public async void Getdata()
        {
            PdfDocumentStream= await DownloadPdfStream("http://10.1.3.202/EofficeFileAPI/FIleDownload/57a3e4dd-3b40-4665-b55a-4b7419d08db6.pdf");
        }
        public GettingStartedViewModel()
        {
            Getdata();
#if COMMONSB
            filePath = "SampleBrowser.Samples.PdfViewer.Samples.";

#else
            filePath = "SampleBrowser.SfPdfViewer.";
           
#endif
        }
        public Stream PdfDocumentStream
        {
            get
            {
                return m_pdfDocumentStream;
            }
            set
            {
                m_pdfDocumentStream = value;
                NotifyPropertyChanged("PdfDocumentStream");

            }
        }
        private void NotifyPropertyChanged(string propertyName)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }

        private bool CanExecute(object parameter)
        {
            return true;
        }
    }



Attachment: ViewFileByID2_4721b8c6.rar

Gayathri Ramalingam [Syncfusion]
Replied On April 8, 2019 11:22 AM UTC

Hi Dung, 

We were able to reproduce the issue “Null reference exception thrown while loading particular PDF document." in our side and we suspect this to be a defect. We have forwarded this issue to our development team for further analysis and we will update further details by 10-April-2019. 
 
With Regards, 
Gayathri R 


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