同一应用程序上的Web API端点

Question

I am having a working Web API application which has the controller called StudyDataController which accepts the input parameters, queries Database and returns result in JSON.That piece is working fine. Calling http://localhost:3214/api/StudyDataController?param1=R01&param2=05-NOV-16 returns result.

public class StudyDataController : ApiController
{  [HttpGet]
   public HttpResponseMessage Getdetails(string param1, DateTime param2)
    {
            List<OracleParameter> p = new List<OracleParameter>();
            p.Add(new OracleParameter("param1", OracleDbType.Varchar2,param1, ParameterDirection.Input));
            p.Add(new OracleParameter("param2",OracleDbType.Date,param2, ParameterDirection.Input));
            string connStr = ConfigurationManager.ConnectionStrings["StudyDataConnection"].ConnectionString;
            using (OracleConnection dbconn = new OracleConnection(connStr))
            {
                DataSet userDataset = new DataSet();
                var strQuery = "SELECT * from Studydata_VW where Request_id = :param1 and RequestDate > :param2 ";
                var returnObject = new { data = new OracleDataTableJsonResponse(connStr, strQuery, prms.ToArray()) };
                var response = Request.CreateResponse(HttpStatusCode.OK, returnObject, MediaTypeHeaderValue.Parse("application/json"));
                ContentDispositionHeaderValue contentDisposition = null;
                if (ContentDispositionHeaderValue.TryParse("inline; filename=StudyData.json", out contentDisposition))
                {
                    response.Content.Headers.ContentDisposition = contentDisposition;
                }
                return response;
               }}}

But I now need to create a one more API has different input parameters and query is different and returns result in JSON. For this I am trying to create one Controller called StudyDatawithDateController on the same application.

public class StudyDatawithDateController : ApiController
{  [HttpGet]
   public HttpResponseMessage Getdetails(DateTime param1,String param2)
    {
            List<OracleParameter> p = new List<OracleParameter>();
            p.Add(new OracleParameter("param1",OracleDbType.Date,param1, ParameterDirection.Input));
            p.Add(new OracleParameter("param2", OracleDbType.Varchar2,param2, ParameterDirection.Input));

            string connStr = ConfigurationManager.ConnectionStrings["StudyDataConnection"].ConnectionString;
            using (OracleConnection dbconn = new OracleConnection(connStr))
            {
                DataSet userDataset = new DataSet();
                var strQuery = "SELECT * from Studydata_VW where Submit_date> :param1 and Status = :param2 ";
                var returnObject = new { data = new OracleDataTableJsonResponse(connStr, strQuery, prms.ToArray()) };
                var response = Request.CreateResponse(HttpStatusCode.OK, returnObject, MediaTypeHeaderValue.Parse("application/json"));
                ContentDispositionHeaderValue contentDisposition = null;
                if (ContentDispositionHeaderValue.TryParse("inline; filename=StudyDatawithDate.json", out contentDisposition))
                {
                    response.Content.Headers.ContentDisposition = contentDisposition;
                }
                return response;
               }}}

If I try to call the endpoint like http://localhost:3214/api/StudyDatawithDateController?param1=01-NOV-16&param2=COMPLETE it says Not Found Error .

The webConfig.cs is like below

 public static class WebApiConfig
 {
    public static void Register(HttpConfiguration config)
    {
        // Web API configuration and services

        // Web API routes
        config.MapHttpAttributeRoutes();

        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );
    }

Can we have two controllers on the same WebAPI application. Most of the questions/Samples are discussing about having same name controllers. But here I am having different names and how can I deal with this.

Answer 1

You can have many routes using get request going to one and the same Controller but different actions with different attribute routes. Just add attribute routing on top of the method you want the route to process

[HttpGet] // http://localhost:3214/api/StudyDatawithDateController?param1=01-NOV-16&param2=COMPLETE [Route("api/StudyDatawithDateController/param1/{param1:string}/param2/{param2:string"})]

http://localhost:3214/api/StudyDataController?param1=R01&param2=05-NOV-16 [Route("api/StudyDataController/param1/{param1:string}/param2/{param2:string")]

The example above will still not work. but if you change the url - specifically param2 and param1 - give them some descriptive names and in the endpoints you will have different parameters.

param2 in the second example is Date and in the first string saying COMPLATE. - change that add the attribute routes and you will be fine.