download doc file in MVC - asp.net-web-api2

Question

I have applicaiton which is the combination of MVC 4 + Web Api + SQL server.
I am trying to download the doc file to MVC but i have tried the below step.
I have Web API where i have written the below code. when i send the rowid it has the value stored in the DB as varbinary. file format can be any thing like .doc,pdf etc ... but however I am looking for the first doc or PDF file format.
When I call the Web api it will create the PDF file and download it , but the file is completely corrupted.
[ResponseType(typeof(MandateExceptionDO))]
[HttpGet]
[Route("api/DealingMandate/GetExceptionDoc/{rowId}")]
public HttpResponseMessage GetExceptionDoc(int rowId)
{
IDealingMandates repository = new DealingMandatesRepository();
List<MandateExceptionDO> mandateexceptiondoc =new List<MandateExceptionDO>();
mandateexceptiondoc = repository.GetExceptionDoc(rowId);
HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
//response.Content = new ByteArrayContent(mandateexceptiondoc[0].Content);
//response.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("multipart/form-data");
//byte[] fileBytes = System.IO.File.ReadAllBytes(mandateexceptiondoc[0].Content);
response.Content = new ByteArrayContent(mandateexceptiondoc[0].Content);
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
response.Content.Headers.ContentDisposition.FileName = "testing.pdf";
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");
//return Ok(mandateexceptiondoc);
return response;
}

Answer 1

I am able to fix this issue on the web api i made the byte as string as show below
String doc = Convert.ToBase64String(customermandate.Content);
and for the MVC side i converted back to byte from the string
var doc = restClient.Execute(request);
var response = doc.Content.Substring(1, doc.Content.Length - 2).Replace(#"\/", "/");
byte[] docBytes = Convert.FromBase64String(response);
if (doc.Content != null && doc.Content.Length > 0 && !string.IsNullOrEmpty(doc.Content))
{
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment; filename=" + FileName);
Response.BinaryWrite(docBytes);
Response.End();
}