Wsrtjtyk

All,
I'm working on my first Azure Function. The intent of the function is to take in text and spell check it using the Bing cognitive API. However, I am unable to compile because at the string text = req.GetQueryNameValuePairs()... line in my code because it states HTTPRequestMessage does not contain a definition for 'GetQueryNameValuePairs' and no extension method 'GetQueryNameValuePairs' accepting a first argument of type 'HttpRequestMessage' could be found (are you missing a using directive or an assembly reference?).

Any help would be appreciated.

using System.IO;

using Microsoft.AspNetCore.Mvc;

using Microsoft.Azure.WebJobs;

using Microsoft.Azure.WebJobs.Extensions.Http;

using Microsoft.AspNetCore.Http;

using Microsoft.Azure.WebJobs.Host;

using Newtonsoft.Json;

using System.Net;

using System;

using System.Net.Http;

using System.Linq;

using System.Collections.Generic;

using System.Net.Http.Headers;

using System.Threading.Tasks;



namespace SpellCheck.Functions

{

    public static class SpellCheck

    {

        [FunctionName("SpellCheck")]

        //public async static Task Run([HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)]HttpRequest req, TraceWriter log)

        public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)]HttpRequestMessage req, TraceWriter log)

        {

            log.Info("C# HTTP trigger function processed a request.");



            //List<KeyValuePair<string, string>> values = new List<KeyValuePair<string, string>>();

            //values.Add(new KeyValuePair<string, string>("text", text));



            //error here

            string text = req.GetQueryNameValuePairs()

                .FirstOrDefault(q => string.Compare(q.Key, "text", true) == 0)

                .Value;



            dynamic data = await req.Content.ReadAsAsync<object>();

            text = text ?? data?.text;



            // Replace the accessKey string value with your valid access key. - https://www.codeproject.com/Articles/1221350/Getting-Started-with-the-Bing-Search-APIs

            const string accessKey = "MY_ACCESS_KEY_GOES_HERE";



            HttpClient client = new HttpClient();

            client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", accessKey);



            //  The endpoint URI.

            const string uriBase = "https://api.cognitive.microsoft.com/bing/v7.0/spellcheck?";

            const string uriMktAndMode = "mkt=en-US&mode=proof&";



            HttpResponseMessage response = new HttpResponseMessage();

            string uri = uriBase + uriMktAndMode;



            List<KeyValuePair<string, string>> values = new List<KeyValuePair<string, string>>();

            values.Add(new KeyValuePair<string, string>("text", text));



            using (FormUrlEncodedContent content = new FormUrlEncodedContent(values))

            {

                content.Headers.ContentType = new MediaTypeHeaderValue("application/x-www-form-urlencoded");

                response = await client.PostAsync(uri, content);

            }



           string client_id;

            if (response.Headers.TryGetValues("X-MSEdge-ClientID", out IEnumerable<string> header_values))

            {

                client_id = header_values.First();

            }



            string contentString = await response.Content.ReadAsStringAsync();



            return text == null

                ? req.CreateResponse(HttpStatusCode.BadRequest, "Please pass text on the query string or in the request body")

                : req.CreateResponse(HttpStatusCode.OK, "Text to Spell: " + text);    

        }

    }

}

Looks like you have created an Azure Function v2(.Net Core). There's no such method GetQueryNameValuePairs on HttpRequestMessage in .Net Core/Standard assembly, it's available in .Net Framework.

The quick fix would be create a v1(.NetFramework) Function Project. If you want to stay with v2 function, code refactor is necessary.

In a v2 Httptrigger template, you can see HttpRequest req(in your grey comment) and it uses req.Query["name"] to get query parameter. There're several other changes necessary as we changed HttpRequestMessage to HttpRequest. Besides, TraceWriter in v1 is also abandoned, in v2 we use ILogger.