Download documents from the Filesystem webserver

Radzen Studio Angular
2

Hi @mcanavar,

Radzen does not support this out of the box. You can however use a custom server method for that (or create another controller). Here is a sample implementation of such a method (inspired by this SO question):

[Route("api/[controller]/[action]")]
public class ServerMethodsController
{
  // Inject a EF context to your database 
  // Check https://www.radzen.com/documentation/invoke-custom-method/#create-the-custom-method-that-executes-the-db-query
   MyDataSourceContext context;

   public ServerMethodsController(MyDataSourceContext context)
   {
       this.context = context;
   }

   [HttpGet("download")]
   public IActionResult GetBlobDownload([FromQuery] string fileName)
   {
       // Find the local file name from the DB
       var file = context.Files.Where(file => file.FileName == fileName).FirstOrDefault();
       
       if (file == null || !File.Exists(file.FileName))
       {
           return NotFound();
       }
       
       // Get a stream to the file
       using var content = System.IO.File.OpenRead(file.FileName);

       // Return the file
       return File(content, "application/octet-stream", fileName);
   }
}

Then to use it in your Angular pages create links to '/api/servermethods/download?fileName=<required filename>' for example '/api/servermethods/download?fileName=test.xlsx'