public IEnumerable <GroceryQueryResult> EndQuery(IAsyncResult result)
{
if (!result.IsCompleted)
{
result.AsyncWaitHandle.WaitOne();
}
GroceryResult groceryResult = result as GroceryResult;
if (groceryResult == null)
{
throw new ArgumentException(InvalidAsyncResult, "result");
}
WebRequest req = groceryResult.InnerResult.AsyncState as WebRequest;
if (req == null)
{
throw new ArgumentException(InvalidAsyncResult, "result");
}
JObject jObject = null;
using (WebResponse resp = req.EndGetResponse(groceryResult.InnerResult))
using (Stream stream = resp.GetResponseStream())
using (StreamReader reader = new StreamReader(stream))
{
string json = reader.ReadToEnd();
jObject = JObject.Parse(json);
}
if ((int)jObject["StatusCode"] >= 400)
{
throw new ApplicationException(
String.Format(
"Grocery API returned status code {0}",
jObject["StatusCode"]));
}
var data = jObject["Groceries"] as JArray;
if (data != null)
{
foreach (var queryResult in data)
{
var jobjResult = queryResult as JObject;
yield return(new GroceryQueryResult(jobjResult));
}
}
else
{
var groceries = jObject["Groceries"] as JObject;
yield return(new GroceryQueryResult(groceries));
}
}
public IAsyncResult BeginQuery(string query, string entity, AsyncCallback callback, object state)
{
string uri = ConstructQueryUri(query, entity);
WebRequest req = WebRequest.Create(uri);
GroceryResult smResult = new GroceryResult(state);
smResult.InnerResult = req.BeginGetResponse(
(result) =>
{
if (callback != null)
callback(smResult);
},
req);
return smResult;
}
public IAsyncResult BeginQuery(string query, string entity, AsyncCallback callback, object state)
{
string uri = ConstructQueryUri(query, entity);
WebRequest req = WebRequest.Create(uri);
GroceryResult smResult = new GroceryResult(state);
smResult.InnerResult = req.BeginGetResponse(
(result) =>
{
if (callback != null)
{
callback(smResult);
}
},
req);
return(smResult);
}
