Can we Convert asp.net web application to web api and use in .Net Core

A web Application returns Html (something to be displayed on screen) but An API just exposes data.

If you have a web app built with n-tier architecture then creating API for it is a 10 minute thing , just reference your business logic in web API and return data as per the requrirement, returning data doesn't mean you can't perform CRUD , it means if it returns something then it reutuns data only.

example

public HttpResponseMessage Get()
{
try
{
var data = EmployeeBL.GetAll(); // get employee in BLL
if (data != null)
{
return Request.CreateResponse(HttpStatusCode.OK, data);
}
return Request.CreateErrorResponse(HttpStatusCode.NotFound, "No result found");
}
catch
{
return new HttpResponseMessage(HttpStatusCode.InternalServerError);
}
}

2 Replies

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Kiran Mohanty5y ago
Accepted answer
ASP.Net web application and .Net web API are different. If you wish to migrate , you will have to rewrite the code.
Sachin Singh5y ago
A web Application returns Html (something to be displayed on screen) but An API just exposes data.
If you have a web app built with n-tier architecture then creating API for it is a 10 minute thing , just reference your business logic in web API and return data as per the requrirement, returning data doesn't mean you can't perform CRUD , it means if it returns something then it reutuns data only.
example
public HttpResponseMessage Get()
      {
          try
          {

              var data = EmployeeBL.GetAll(); // get employee in BLL
              if (data != null)
              {
                  return Request.CreateResponse(HttpStatusCode.OK, data);
              }
              return Request.CreateErrorResponse(HttpStatusCode.NotFound, "No result found");
          }
          catch
          {
              return new HttpResponseMessage(HttpStatusCode.InternalServerError);
          }
      }