I am consuming the .asmx service in my asp.net web api application like this :
[
but this service returns nothing, but in turn writes response in HTTP response object like this:
` [WebMethod(EnableSession = true)]
[ScriptMethod(UseHttpGet = true, ResponseFormat = ResponseFormat.Json)]
public void GetResearchDocsBySector(int pageCode, int resultsPerPage, string subTypeIds, int timeframe)
{
JavaScriptSerializer js = new JavaScriptSerializer();
IRatingsDirectDataMgr dataMgr = RemoteUtil.GetRemote();
List<ResearchDocumentDisplay> results = dataMgr.GetSolrResults(pageCode, resultsPerPage, subTypeIds, timeframe, false);
List<ResearchDocumentWidgetDisplay> resultList = new List<ResearchDocumentWidgetDisplay>();
foreach (var item in results)
{
var obj = ObjMapper<ResearchDocumentDisplay, ResearchDocumentWidgetDisplay>.Map(item);
obj.ArticleTypeName = Constants.TypeMappings[obj.ArticleTypeId];
resultList.Add(obj);
}
HttpContext.Current.Response.Write(js.Serialize(resultList));
}`
I want to consume the result obtained from the service in my webapi application in json format how can we go about it ?
Note : I can't change the .asmx service code at all !!
Set GetResearchDocsBySector to return your List rather than having a void return type and injecting it into the Current http content. TO do this you will need to mark ResearchDocumentWidgetDisplay as Serialisable which you do by adding [Serialisable] above your class ResearchDocumentWidgetDisplay.
Related
I have created a WCF Web Service using this walk through:
http://mikesknowledgebase.com/pages/Services/WebServices-Page2.htm
It returns data from a local SQL Server. The WCF Web Service takes a string parameter, and returns it back, as a string in JSON format.
I have now created a client website where i want to use the WCF Services as my data source to output the information in the database through a grid view or something similar. How do i do this? I assume i have to use some c#.
Service.cs:
public class Service : IService
{
private object cds;
public List<cdInfo> GetCDinfo()
{
try
{
CdDataClassesDataContext dc = new CdDataClassesDataContext();
List<cdInfo> results = new List<cdInfo>();
foreach (cd cD in dc.cds)
{
results.Add(new cdInfo()
{
Id = cD.Id.ToString(),
artist = cD.artist,
genre = cD.genre,
title = cD.title,
date = cD.date
});}
return results;
}
catch (Exception ex)
{
// Return any exception messages back to the Response header
OutgoingWebResponseContext response = WebOperationContext.Current.OutgoingResponse;
response.StatusCode = System.Net.HttpStatusCode.InternalServerError;
response.StatusDescription = ex.Message.Replace("\r\n", "");
return null;}}}
Hopefully this link will help you in consuming WCF service.
https://msdn.microsoft.com/en-us/library/bb412178(v=vs.110).aspx
I have the following namespace for the web service and I can see lots of functions I can access...
using MyService.api;
public class HomeController : Controller
{
public ActionResult Index()
{
//What needs to go here?
// LoginRequest and Response are types from the web service reference
LoginRequest loginRequest = new LoginRequest();
loginRequest.user = "blah";
loginRequest.password = "abc1234";
LoginResponse loginResponse = new LoginResponse();
string sessionID = loginResponseSession.session.sessionId; // This has nothing in it
return View("Index", sessionID );
}
...
the api exposes all of these methods, things like:
MachineRequest machineRequest = new MachineRequest();
string[] machines = machineRequest.machines;
But ofcourse when I call that, it does not magically go and collect machines from the url.
How do I make and respond to the requests? What is the Service reference actually for?
Your question is a bit unclear. If you've generated a WCF service reference, you can use the "proxy" or "client" like this:
var client = new MyService.api.ApiReferenceClient();
var loginResponse = client.LoginRequest(loginRequest);
That will perform the SOAP call (or whatever binding is being used).
My page must get a response from a web service with the following calls:
GetModBook.InvService.InventoryServiceClient isc = new GetModBook.InvService.InventoryServiceClient();
GetModBook.InvService.GetModBookingsOperationRequest gmoreq = new GetModBook.InvService.GetModBookingsOperationRequest();
GetModBook.InvService.GetModBookingsOperationResponse gmores = new GetModBook.InvService.GetModBookingsOperationResponse();
GetModBookingsOperationResponse has a field called Bookings with an array of Booking as such
public GetModBookingsOperationResponse
{
public Booking Bookings;
}
I have used the request portion of a web service
example:
gmoreq.RatePackages = new GetModBook.InvService.GetModBookingsOperationRequest[NoofRatePackages]
Editted:
Calling a web service
but I do not know how to call the response portion
Any advise would be greatly appreciated.
Editted:
GetModBookingsResponse GetModBookings(GetModBookingsRequest request)
Here is how you can get response
GetModBook.InvService.InventoryServiceClient isc = new GetModBook.InvService.InventoryServiceClient();
GetModBook.InvService.GetModBookingsOperationRequest gmoreq = new GetModBook.InvService.GetModBookingsOperationRequest();
//set the request parameters if there any
GetModBook.InvService.GetModBookingsOperationResponse gmores =isc.GetModBookings(gmoreq);
Without seeing your complete class implementation I can't say how to call it but here is an example on how to call web service method.
The following example will show how to get server using web service.
Web service cs file
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
public class SampleWebService : System.Web.Services.WebService
{
[WebMethod]
public DateTime GetServerDate()
{
return DateTime.Now;
}
}
Webservice consumer page
SampleWebServiceWS.SampleWebServiceClient ws = new SampleWebServiceWS.SampleWebServiceClient();
DateTime dt= ws.GetServerDate();
Similar way you can call your method and assign it to a variable.
I didn't tested the code but hope this will give an idea on how to implement this.
Iam connecting my Android app to a wcf service, and in my Log.i I can see that it return data correct, The only thing I want to handle it as JSON but my service sends as XML-(I think): this is how the code in the app looks like:
if (entity != null)
{
InputStream instream = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(instream));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null){
sb.append(line + "n");
}
String result = sb.toString();
Log.i(TAG,result);
instream.close();
JSONObject json=new JSONObject(result);
JSONArray nameArray=json.names();
JSONArray valArray=json.toJSONArray(nameArray);
and my example method looks like this, I don't know how to return correct JSON data from the WCF webserivce:
/// <returns>An enumeration of the (id, item) pairs. Returns null if no items are present</returns>
protected override IEnumerable<KeyValuePair<string, SampleItem>> OnGetItems()
{
// TODO: Change the sample implementation here
if (items.Count == 0)
{
items.Add("A", new SampleItem() { Value = "A" });
items.Add("B", new SampleItem() { Value = "B" });
items.Add("C", new SampleItem() { Value = "C" });
}
return this.items;
}
This is the error I get:
09-12 17:11:04.924: WARN/System.err(437): org.json.JSONException: Value <ItemInfoList of type java.lang.String cannot be converted to JSONObject
Add:
[WebGet(ResponseFormat = WebMessageFormat.Json)]
As an attribute over your WCF service method. Change WebGet to WebInvoke if you are not using GET requests to call the service.
This looks like the code from WCF REST Starter Kit, the REST Collection template, so it should already support both XML and JSON. It's the service URI you specify on the client side that returns either XML or JSON representation. By default it sends XML but if you put "?format=json" at the and of the service URI it sends the resource in JSON format.
You can get helpful information by using built-in description of the service returned in ATOM (if I remember well) with /help after service URI
something like:
http://localhost/servicetest/Service.svc/help
This is how the wcf serivce method looks like: this returns a collection of values. I added the [WebGet(ResponseFormat = WebMessageFormat.Json)] but still it is not working.
[WebGet(ResponseFormat = WebMessageFormat.Json)]
protected override IEnumerable<KeyValuePair<string, SampleItem>> OnGetItems()
{
// TODO: Change the sample implementation here
if (items.Count == 0)
{
items.Add("A", new SampleItem() { Value = "A" });
items.Add("B", new SampleItem() { Value = "B" });
items.Add("C", new SampleItem() { Value = "C" });
}
return this.items;
}
I have a Windows web server already set up with a website (unlimited application pools) and I want to be able to access a database on that server via the Android app I'm developing. How can I do this? Can someone point me to a tutorial or give code example of how this cross-platform (Android/Java to ASP.NET/C#) communication can be done?
(I'm trying to create a leader board or global scoreboard for my Android game on my server.)
Thanks.
Your app should expose a webservice.
There is no native support for .net soap based webservices. But you can use the ksoap android port:
http://code.google.com/p/ksoap2-android/
which allows an android app to consume a .net asmx webservice.
However the deserialisation of complex on the client side involves lot of code writing for every object you want so pass to the client.
I tried it for a project and there were some problems I ran into (either I could get result back to the client but the parameters i passed where always null or the other way - I could pass arguments but the result was null).
Here is an example I posted for getting an int: How to call a .NET Webservice from Android using KSOAP2?
However, from my current knowlege I would suggest using a .asmx webservice that returns a json string and use a java json serialiser to parse the output. The advantages:
Write less code
Faster, since mobile devices don't always have good internet connections and the xml overhead from soap is bigger than json.
Quickstart:
Create a new asmx Webservice in your .net webapp.
Include a reference to System.Web.
Decorate your webservice class with [ScriptService] and your method with [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
[ScriptService]
public class WebService1 : System.Web.Services.WebService
{
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public string HelloAndroid()
{
return "Hello Android";
}
}
(I think you have to add a reference to System.Web.Extension.dll which is available since .net 3.5).
Your webservice will still return XML (so you can use it with a soap client) unless you make a HTTPPost request with content-type "application/json".
use this code to contact the webservice from android:
private JSONObject sendJsonRequest(string host, int port,
String uri, JSONObject param)
throws ClientProtocolException, IOException, JSONException
{
HttpClient httpClient = new DefaultHttpClient();
HttpHost httpHost = new HttpHost(host, port);
HttpPost httpPost = new HttpPost(uri);
httpPost.addHeader("Content-Type", "application/json; charset=utf-8");
if (param != null)
{
HttpEntity bodyEntity = new StringEntity(param.toString(), "utf8");
httpPost.setEntity(bodyEntity);
}
HttpResponse response = httpClient.execute(httpHost, httpPost);
HttpEntity entity = response.getEntity();
String result = null;
if (entity != null) {
InputStream instream = entity.getContent();
BufferedReader reader = new BufferedReader(
new InputStreamReader(instream));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
sb.append(line + "\n");
result = sb.toString();
instream.close();
}
httpPost.abort();
return result != null ? new JSONObject(result) : null;
}
if your webservice methods looks like this:
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public User GetUser(string name, int age)
{
return new User { Name = name, Age = age; }
}
You can call it this way from android:
public void getUser() {
// if you put a json object to the server
// the properties are automagically mapped to the methods' input parameters
JSONObject param = new JSONObject();
param.put("name", "John Doe");
param.put("age", 47);
JSONObject result = sendJsonRequest("server", 80,
"http://server:80/service1.asmx/GetUser", param);
if (result != null) {
JSONObject user = new JSONObject(result.getString("d"));
// .net webservices always return the result
// wrapped in a parameter named "d"
system.out.println(user.getString("name"));
system.out.println(user.getInt("age").toString());
}
}
Handling server exceptions on the client side:
Add this class to your project:
import org.json.JSONException;
import org.json.JSONObject;
public class JSONExceptionHelper {
private static final String KEY_MESSAGE = "Message";
private static final String KEY_EXCEPTIONTYPE = "ExceptionType";
private static final String KEY_STACKTRACE = "StackTrace";
public static boolean isException(JSONObject json) {
return json == null
? false
: json.has(KEY_MESSAGE) &&
json.has(KEY_EXCEPTIONTYPE) &&
json.has(KEY_STACKTRACE);
}
public static void ThrowJsonException(JSONObject json) throws JSONException {
String message = json.getString(KEY_MESSAGE);
String exceptiontype = json.getString(KEY_EXCEPTIONTYPE);
String stacktrace = json.getString(KEY_STACKTRACE);
StringBuilder sb = new StringBuilder();
sb.append(exceptiontype);
sb.append(": ");
sb.append(message);
sb.append(System.getProperty("line.separator"));
sb.append(stacktrace);
throw new JSONException(sb.toString());
}
}
Now replace the return statement from the sendJSONRequest with:
JSONObject json = result != null ? new JSONObject(result) : null
if (JSONExceptionHelper.isException(json))
JSONExceptionHelper.ThrowJsonException(json);
return json;
Please note: The exception is passed to the client only if connection comes from localhost.
Otherwise you get an http error 500 (or 501? I can't remember). You have to configure your IIS to send error 500 to the client.
Try it out and create a webservice that always throws an exception.
Sounds like a job for Web Services.
Start by creating a Web Service on the Windows web server, you can do this with ASP.NET (or maybe this might be more current).
On the Java side you can call the webservice and use the results that you get back. I think this question may help you get started on this side.
In case you have trouble writing web methods which return array of objects, you may want to refer here:
ksoap android web-service tutorial
Hope it helps.