How to download file from byte Array in asp.net core MVC?

Question

Hi All,
How to download XML data from byte array in Asp.net core. Below is my code

       string sXML = xml data in string format

        byte[] bytesInStream = System.Text.Encoding.UTF8.GetBytes(sXML);


        Please let me know whats the code for download in .net core MVC. The code working in .net framework MVC giving compile error. that code giving below

byte[] bytesInStream = System.Text.Encoding.UTF8.GetBytes(sXML);

        string fileName = FileName

        Response.Clear();
        Response.ContentType = "text/xml";
        Response.AddHeader("content-disposition", $"attachment; filename={fileName}");
        Response.BinaryWrite(bytesInStream);
        Response.ContentEncoding = System.Text.Encoding.UTF8;
        Response.End();

Answer 1

MVC controllers have a File return type.

public IActionResult FileHandler(int id)
{
    //look up the Id 
    var path = Path.Combine(Environment.ContentRootPath, @$"wwwroot/Content/{id}");
    var fileStream = System.IO.File.OpenRead(path);
    return File(fileStream, "application/pdf");
}

Answer 2

Hi @Binumon George ,

I suggest you could return the file action which and add some response header inside this response to achieve your requirement. More details, you could refer to below codes:

        public IActionResult DownloadXML() {  
  
            string sXML = "<xml><test>1</test></xml>";  
  
            Byte[] bytesInStream = System.Text.Encoding.UTF8.GetBytes(sXML);  
  
  
            Response.Headers.Add("content-disposition", $"attachment; filename=test");  
  
            return File(bytesInStream, "application/xml");  
  
        }