Pdf viewer server not load

[Adriano]

Hi Support,

i'm using Blazor server and and your 19.1.57 component suite.

I have this problem:

I have some pdf files that i need to load using Load method passing the Base 64 string.

This is my code

byte[] byteArray = System.IO.File.ReadAllBytes(@"c:\temp\2.pdf");

base64String = Convert.ToBase64String(byteArray);

await viewer.Load("data:application/pdf;base64," + base64String, "");

//await viewer.Load(@"c:\temp\2.pdf", "");

If i use the base64 loading strign string, file does not load and i have a server - side error... If instead i use the commented line using physical path, it works smoothly!

I attach the PDF since not all pdfs shows this problem. Please try with this one

Thank you

Daniele

Attachment: 2_36d158c0.zip

[Vasugi Sivajothi]

Hi Adriano, 

 

Thank you for contacting Syncfusion support. 

 

We have tried to reproduce the reported issue with the provided document but were unable to reproduce it.  

 

We have shared the sample in which we have tried to reproduce the issue. Please refer to the below code snippet and sample. 

 

Code Snippet: 

 

 

<SfButton @onclick="clicked">Load Document</SfButton> 

 

public void clicked() 

    { 

        byte[] byteArray = System.IO.File.ReadAllBytes("wwwroot/Data/2.pdf"); 

        string base64String = Convert.ToBase64String(byteArray); 

        Viewer.Load("data:application/pdf;base64," + base64String, null); 

    } 

 

 

 

Sample: https://www.syncfusion.com/downloads/support/directtrac/general/ze/BlazorSample-1997283517 

 

 

Documentation: https://blazor.syncfusion.com/documentation/pdfviewer/how-to/load-pdf-document-dynamically/ 

 

 

Kindly try the sample we have provided and let us know if the issue resolves or not. If not, kindly share the error details about your issue. This will be helpful to investigate further and provide the solution at the earliest. 

 

 

Regards, 

Vasugi 

[Adriano]

Hi Vasugi,

i figured out the issue, i simply forgot the  .AddHubOptions(o => { o.MaximumReceiveMessageSize = 102400000; });

So, when the pdf was bigger i had the issue.

Another small thing... i 'm not able to set/specify the download file name. Seems that components ignore the porperty....

Could you kindly give me an example for that?

Thanks

     Daniele

[Vasugi Sivajothi]

Hi Adriano,  

 

Thank you for the update. 

 

We are glad to know that the issue is resolved. A code and the sample are shared below to change the download file name with the DownloadFileName API. Please refer to the below details. 

 

Code Snippet: 

 

<SfPdfViewerServer @ref="Viewer" DownloadFileName="@DownloadFileName"> 

   <PdfViewerEvents Created="LoadDocument"></PdfViewerEvents> 

</SfPdfViewerServer> 

 

public void LoadDocument() 

    { 

        byte[] byteArray = System.IO.File.ReadAllBytes("wwwroot/Data/2.pdf"); 

        string base64String = Convert.ToBase64String(byteArray); 

        Viewer.Load("data:application/pdf;base64," + base64String, null); 

        DownloadFileName = "Syncfusion.pdf"; 

    } 

 

Sample: https://www.syncfusion.com/downloads/support/directtrac/general/ze/BlazorSample-1848498691 

 

Kindly try this and let us know if you have any concerns about this. 

 

Regards, 

Vasugi. 

[Gianluca Dora]

Hi the sample  

https://www.syncfusion.com/downloads/support/directtrac/general/ze/BlazorSample-1848498691

after upgrade 20.1.0.47 don't work 

[Vasugi Sivajothi]

Hi G Dora,

We have breaking changes in the latest version V20.1.0.47. So, we suggest you enable JavaScript isolation by setting IgnoreScriptIsolation as false while adding the Syncfusion Blazor service using AddSyncfusionBlazor().

Code Snippet in a startup.cs file.

 

services.AddSyncfusionBlazor(options => { options.IgnoreScriptIsolation = false; });

 

Modified Sample: https://www.syncfusion.com/downloads/support/directtrac/general/ze/BlazorSample2100238880

For more information, please refer to the below UG link.

https://blazor.syncfusion.com/documentation/release-notes/20.1.47?type=all#breaking-changes

Kindly try this and let us know if this helps you.

Regards,

Vasugi.