adding image insights tutorial code

Author: aahill

dotnet/Search/BingImageSearchInsightsTutorial.cs

@@ -0,0 +1,147 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Net;
+
+namespace ConsoleAppPost
+{
+    class Program
+    {
+        // Replace the accessKey string value with your valid access key.
+        const string accessKey = "enter key here";
+
+        // The endpoint URI.  
+        const string uriBase = "https://api.cognitive.microsoft.com/bing/v7.0/images/details";
+
+        // The image to upload. Replace with your file and path.
+        const string imageFile = "your-image-file.jpg";
+
+        // Used to return image results including relevant headers
+        struct SearchResult
+        {
+            public String jsonResult;
+            public Dictionary<String, String> relevantHeaders;
+        }
+
+        static void Main()
+        {
+            Console.OutputEncoding = System.Text.Encoding.UTF8;
+
+            if (accessKey.Length == 32)
+            {
+                //Console.WriteLine("Searching images for: " + searchTerm);
+
+                SearchResult result = BingImageSearch(uriBase);
+
+                Console.WriteLine("\nRelevant HTTP Headers:\n");
+                foreach (var header in result.relevantHeaders)
+                    Console.WriteLine(header.Key + ": " + header.Value);
+
+                Console.WriteLine("\nJSON Response:\n");
+                Console.WriteLine(JsonPrettyPrint(result.jsonResult));
+            }
+            else
+            {
+                Console.WriteLine("Invalid Bing Search API subscription key!");
+                Console.WriteLine("Please paste yours into the source code.");
+            }
+
+            Console.Write("\nPress Enter to exit ");
+            Console.ReadLine();
+        }
+
+        /// <summary>
+        /// Performs a Bing Image search and return the results as a SearchResult.
+        /// </summary>
+        static SearchResult BingImageSearch(string uriStr)
+        {
+            WebClient client = new WebClient();
+            client.Headers["Ocp-Apim-Subscription-Key"] = accessKey;
+            client.Headers["ContentType"] = "multipart/form-data";
+
+            byte[] resp = client.UploadFile(uriBase + "?modules=All", imageFile);
+            var json = System.Text.Encoding.Default.GetString(resp);
+
+            // Create result object for return
+            var searchResult = new SearchResult()
+            {
+                jsonResult = json,
+                relevantHeaders = new Dictionary<String, String>()
+            };
+
+            return searchResult;
+        }
+
+        /// <summary>
+        /// Formats the given JSON string by adding line breaks and indents.
+        /// </summary>
+        /// <param name="json">The raw JSON string to format.</param>
+        /// <returns>The formatted JSON string.</returns>
+        static string JsonPrettyPrint(string json)
+        {
+            if (string.IsNullOrEmpty(json))
+                return string.Empty;
+
+            json = json.Replace(Environment.NewLine, "").Replace("\t", "");
+
+            StringBuilder sb = new StringBuilder();
+            bool quote = false;
+            bool ignore = false;
+            char last = ' ';
+            int offset = 0;
+            int indentLength = 2;
+
+            foreach (char ch in json)
+            {
+                switch (ch)
+                {
+                    case '"':
+                        if (!ignore) quote = !quote;
+                        break;
+                    case '\\':
+                        if (quote && last != '\\') ignore = true;
+                        break;
+                }
+
+                if (quote)
+                {
+                    sb.Append(ch);
+                    if (last == '\\' && ignore) ignore = false;
+                }
+                else
+                {
+                    switch (ch)
+                    {
+                        case '{':
+                        case '[':
+                            sb.Append(ch);
+                            sb.Append(Environment.NewLine);
+                            sb.Append(new string(' ', ++offset * indentLength));
+                            break;
+                        case '}':
+                        case ']':
+                            sb.Append(Environment.NewLine);
+                            sb.Append(new string(' ', --offset * indentLength));
+                            sb.Append(ch);
+                            break;
+                        case ',':
+                            sb.Append(ch);
+                            sb.Append(Environment.NewLine);
+                            sb.Append(new string(' ', offset * indentLength));
+                            break;
+                        case ':':
+                            sb.Append(ch);
+                            sb.Append(' ');
+                            break;
+                        default:
+                            if (quote || ch != ' ') sb.Append(ch);
+                            break;
+                    }
+                }
+                last = ch;
+            }
+
+            return sb.ToString().Trim();
+        }
+    }
+}