How to read application/pdf type from web api and display the response in browser in asp.net c#? - asp.net

Question

I have a Web API which returns HttpResponseMessage of type application/pdf using HttpPost method. I want to display the file which is returning from the API in asp.net webforms but I am unable to do it even though I tried to return response directly. Can anyone help me. P.S:-When I pass parameters in body using Postman Post I am able to generate PDF.
Web API Code:-
public HttpResponseMessage o([FromBody] CPRSsubmit customers)
{
string path = "~/PayBill/" + customers.value + "/";
string sail_pl_no;
HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK);
using (OracleConnection con = new OracleConnection(ConnectionStr.Con("oracle")))
{
using (OracleCommand cmd = new OracleCommand(query, con))
{
cmd.Connection = con;
con.Open();
using (OracleDataReader sdr = cmd.ExecuteReader())
{
if (sdr.HasRows)
{
while (sdr.Read())
{
sail_pl_no = Convert.ToString(sdr[0]).Trim();
path += sail_pl_no;
}
}
else
{
return Request.CreateResponse(HttpStatusCode.NotFound);
}
}
con.Close();
}
}
path += "_E_" + customers.value + ".pdf";
string filePath = HttpContext.Current.Server.MapPath(path);
if (!File.Exists(filePath))
{
//Throw 404 (Not Found) exception if File not found.
response.StatusCode = HttpStatusCode.NotFound;
response.ReasonPhrase = string.Format("File not found");
throw new HttpResponseException(response);
}
byte[] bytes = File.ReadAllBytes(filePath);
response.Content = new ByteArrayContent(bytes);
response.Content.Headers.ContentLength = bytes.LongLength;
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("inline");
response.Content.Headers.ContentDisposition.FileName = customers.value + ".pdf";
response.Content.Headers.ContentType = new MediaTypeHeaderValue(MimeMapping.GetMimeMapping(customers.value + ".pdf"));
return response;
}
Asp.net webform code:-
protected void btnSubmit_Click(object sender, EventArgs e)
{
Model.CPRSPost cpr = new Model.CPRSPost();
cpr.pl_no = Convert.ToInt32(Session["LoginId"]);
cpr.value = ddlMonth.SelectedValue;
var url = "CPRSPayBill/O";
HttpResponseMessage response = client.PostAsJsonAsync(url,cpr).Result;
if (response.IsSuccessStatusCode)
{
return response;
}
else
{
}
}