Added Query.OnResult callback

Facepunch.Steamworks.Test/Client/Workshop.cs

@@ -243,6 +243,41 @@ namespace Facepunch.Steamworks.Test
             }
         }
 
+        [TestMethod]
+        public void QueryCallback()
+        {
+            using ( var client = new Facepunch.Steamworks.Client( 252490 ) )
+            {
+                Assert.IsTrue( client.IsValid );
+
+                using ( var Query = client.Workshop.CreateQuery() )
+                {
+                    var gotCallback = false;
+
+                    Query.OnResult = ( q ) =>
+                    {
+                        Assert.AreEqual( q.Items.Length, 1 );
+                        Console.WriteLine( "Query.TotalResults: {0}", q.TotalResults );
+                        Console.WriteLine( "Query.Items.Length: {0}", q.Items.Length );
+
+                        gotCallback = true;
+                    };
+
+                    Query.FileId.Add( 751993251 );
+                    Query.Run();
+
+                    Assert.IsTrue( Query.IsRunning );
+
+                    client.UpdateWhile( () => gotCallback == false );
+
+                    Assert.IsFalse( Query.IsRunning );
+                    Assert.AreEqual( Query.TotalResults, 1 );
+
+                    Assert.AreEqual<ulong>( Query.Items[0].Id, 751993251 );
+                }
+            }
+        }
+
         [TestMethod]
         public void QueryFiles()
         {

Facepunch.Steamworks/Interfaces/Workshop.Query.cs

@@ -37,6 +37,11 @@ namespace Facepunch.Steamworks
 
             public UserQueryType UserQueryType { get; set; } = UserQueryType.Published;
 
+            /// <summary>
+            /// Called when the query finishes
+            /// </summary>
+            public Action<Query> OnResult;
+
             /// <summary>
             /// Page starts at 1 !!
             /// </summary>
@@ -106,10 +111,10 @@ namespace Facepunch.Steamworks
                 foreach ( var tag in ExcludeTags )
                     workshop.ugc.AddExcludedTag( Handle, tag );
 
-                Callback = workshop.ugc.SendQueryUGCRequest( Handle, OnResult );
+                Callback = workshop.ugc.SendQueryUGCRequest( Handle, ResultCallback );
             }
 
-            void OnResult( SteamNative.SteamUGCQueryCompleted_t data, bool bFailed )
+            void ResultCallback( SteamNative.SteamUGCQueryCompleted_t data, bool bFailed )
             {
                 if ( bFailed )
                     throw new System.Exception( "bFailed!" );
@@ -166,6 +171,11 @@ namespace Facepunch.Steamworks
                 else
                 {
                     Items = _results.ToArray();
+
+                    if ( OnResult != null )
+                    {
+                        OnResult( this );
+                    }
                 }
             }