DOCSP-49867: Add JsonReader example

source/data-formats/extended-json.txt

@@ -44,6 +44,23 @@ Extended JSON document into a ``BsonDocument`` object:
 
       { "_id" : { "$oid" : "573a1391f29313caabcd9637" }, "createdAt" : { "$date" : "1970-01-19T12:51:39.609Z" }, "numViews" : 36520312 }
 
+Alternatively, you can use the ``JsonReader`` class to read Extended JSON documents. The
+following example reads uses the ``JsonReader`` class to read the same Extended JSON document
+as the preceding example into a ``BsonDocument`` object:
+
+.. io-code-block::
+
+   .. input:: /includes/fundamentals/code-examples/ExtendedJson.cs
+      :language: csharp
+      :start-after: start-read-ejson-reader
+      :end-before: end-read-ejson-reader
+      :dedent:
+
+   .. output::
+      :visible: false
+
+      { "_id" : { "$oid" : "573a1391f29313caabcd9637" }, "createdAt" : { "$date" : "1970-01-19T12:51:39.609Z" }, "numViews" : 36520312 }
+
 Write Extended JSON
 -------------------
 
@@ -87,5 +104,4 @@ documentation:
 - `JsonWriter <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.IO.JsonWriter.html>`__
 - `JsonReader <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.IO.JsonReader.html>`__
 - `JsonWriterSettings <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.IO.JsonWriterSettings.html>`__
-- `JsonReaderSettings <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.IO.JsonReaderSettings.html>`__
 - `JsonOutputMode <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.IO.JsonOutputMode.html>`__

source/includes/fundamentals/code-examples/ExtendedJson.cs

@@ -14,6 +14,19 @@ public static void Main(string[] args)
             Console.WriteLine(document.ToJson());
             // end-read-ejson
         }
+
+        {
+            // start-read-ejson-reader
+            var ejson = "{\n\"_id\": { \"$oid\": \"573a1391f29313caabcd9637\" },\n  \"createdAt\": { \"$date\": { \"$numberLong\": \"1601499609\" }},\n\"numViews\": { \"$numberLong\": \"36520312\" }\n}\n\n";
+            var subject = new BsonDocumentSerializer();
+            using (var reader = new JsonReader(ejson))
+            {
+                var context = BsonDeserializationContext.CreateRoot(reader);
+                var document = subject.Deserialize<BsonDocument>(context);
+                Console.WriteLine(document.ToJson());
+            }
+            // end-read-ejson-reader
+        }
 
         {
             // start-write-ejson