call Api from server side not in client side - asp.net

Question

How Can I call the Request Get (Api) from server side.
Here is the Server side
public string GetAllBook()
{
bookAssembly bookassembleur = new bookAssembly();
bookList = bookassembleur.GetBooks();
}
And here is the Api Request
public List<Book> Get()
{
BookAssembly searchallbook = new BookAssembly();
return searchallbook.GetBooks();
bookAssembly bookassembleur = new bookAssembly();
bookList = bookassembleur.GetBooks();
DataTable dt = new DataTable();
if (dt.Columns.Count == 0)
{
dt.Columns.Add("ID");
dt.Columns.Add("Title");
dt.Columns.Add("Price");
dt.Columns.Add("Author");
dt.Columns.Add("Qauntite");
dt.Columns.Add("Categorie");
}
foreach (Book book in bookList)
{
DataRow NewRow = dt.NewRow();
NewRow[0] = book.ID;
NewRow[1] = book.Title;
NewRow[2] = book.Price;
NewRow[3] = book.Author;
NewRow[4] = book.Qauntite;
NewRow[5] = book.Categorie.Name;
dt.Rows.Add(NewRow);
}
gvBook.DataSource = dt;
gvBook.DataBind();
return "";
}
i want remove bookList = bookassembleur.GetBooks() ana call api

Answer 1

You have to access it using HttpClient.
e.g.
using (var client = new HttpClient())
{
client.BaseAddress = new Uri("<your_api_path>");
var response= client.GetAsync("GetAllBook");
response.Wait();
BookAssembly searchallbook = response.Result;
}
P.S. this is not running code, just an idea.

Answer 2

public string GetAllBook()
{
DataTable dt = new DataTable();
using (var client = new HttpClient())
{
client.BaseAddress = new Uri("http://localhost:6735/api/book");
//HTTP GET
var responseTask = client.GetAsync("Book");
responseTask.Wait();
var result = responseTask.Result;
if (result.IsSuccessStatusCode)
{
var readTask = result.Content.ReadAsAsync<Book[]>();
readTask.Wait();
var Books = readTask.Result;
if (dt.Columns.Count == 0)
{
dt.Columns.Add("ID");
dt.Columns.Add("Title");
dt.Columns.Add("Price");
dt.Columns.Add("Author");
dt.Columns.Add("Qauntite");
dt.Columns.Add("Categorie");
}
foreach (Book book in Books)
{
DataRow NewRow = dt.NewRow();
NewRow[0] = book.ID;
NewRow[1] = book.Title;
NewRow[2] = book.Price;
NewRow[3] = book.Author;
NewRow[4] = book.Qauntite;
NewRow[5] = book.Categorie.Name;
dt.Rows.Add(NewRow);
}
}
}
gvBook.DataSource = dt;
gvBook.DataBind();
return "";
}