Removed old sample queries file that was no longer used, fixed issue where graph explorer did not show an empty graph if there were no matches, some cleanup

tools/Explorer/SampleQueries.cs

@@ -1,53 +0,0 @@
-// Copyright (c) Microsoft Corporation.
-// Licensed under the MIT license.
-
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Reflection;
-
-namespace XppReasoningWpf
-{
-    class SampleQueries
-    {
-        public static List<string> AddQueries(string rootDirectory)
-        {
-            var result = new List<string>();
-            var assembly = Assembly.GetExecutingAssembly();
-
-            // Get all the xq streams??
-            var names = assembly.GetManifestResourceNames().Where(n => n.StartsWith("XppReasoningWpf.Queries", StringComparison.OrdinalIgnoreCase));
-
-            foreach (var queryName in names)
-            {
-                using (Stream s = assembly.GetManifestResourceStream(queryName))
-                {
-                    var r = new StreamReader(s);
-                    {
-                        var c = r.ReadToEnd();
-
-                        var parts = queryName.Split('.').ToList();
-                        parts.RemoveAt(0); // Skip namespace
-
-                        var extension = parts.Last();
-                        parts.RemoveAt(parts.Count() - 1);
-
-                        var name = parts.Last();
-                        parts.RemoveAt(parts.Count() - 1);
-
-                        string directoryPart = Path.Combine(parts.ToArray());
-                        var directoryName = Path.Combine(rootDirectory, directoryPart);
-                        Directory.CreateDirectory(directoryName);
-
-                        var fullName = Path.Combine(directoryName, name + '.' + extension);
-                        result.Add(fullName);
-                        File.WriteAllText(fullName, c);
-                    }
-                }
-            }
-
-            return result;
-        }
-    }
-}

tools/Graph Explorer/GraphExplorer/Models/Model.cs

@@ -192,9 +192,10 @@ namespace SocratexGraphExplorer.Models
 
         public string QueryFont => Properties.Settings.Default.QueryFont;
 
-        public void CreateNeo4jDriver(string password)
+        public IDriver CreateNeo4jDriver(string password)
         {
             this.Driver = GraphDatabase.Driver(string.Format("bolt://{0}:{1}", this.Server, this.Port), AuthTokens.Basic(this.Username, password));
+            return this.Driver;
         }
 
         public Model()
@@ -249,10 +250,15 @@ namespace SocratexGraphExplorer.Models
                     if (driver == null)
                         return false;
 
-                    var session = driver.AsyncSession();
-                    var cursor = await session.RunAsync("match(c) return count(c)");
-                    var list = await cursor.ToListAsync();
-                    return list != null && list.Any();
+                    try
+                    {
+                        await driver.VerifyConnectivityAsync();
+                        return true;
+                    }
+                    catch
+                    {
+                        return false;
+                    }
                 }
             }
             catch (Exception )
@@ -469,10 +475,11 @@ namespace SocratexGraphExplorer.Models
 
         public static HashSet<long> HarvestNodeIdsFromGraph(List<IRecord> records)
         {
-            if (!records.Any())
-                return null;
-
             var result = new HashSet<long>();
+
+            if (!records.Any())
+                return result;
+
             App.Current.Dispatcher.Invoke(() =>
             {
                 foreach (var record in records)

tools/Graph Explorer/GraphExplorer/ViewModels/EditorViewModel.cs

@@ -335,7 +335,6 @@ namespace SocratexGraphExplorer.ViewModels
             this.model = model;
 
             NodeSelected += UpdateNodeInfoPage;
-
             EdgeSelected += UpdateEdgeInfoPage;
 
             this.PropertyChanged += async (object sender, PropertyChangedEventArgs e) =>

tools/Graph Explorer/GraphExplorer/Views/FormInformationControl.xaml.cs

@@ -55,7 +55,7 @@ namespace SocratexGraphExplorer.Views
             this.SourceEditorBox.Content = this.ClassEditor;
         }
 
-        private async void UserControl_Loaded(object sender, RoutedEventArgs e)
+        private void UserControl_Loaded(object sender, RoutedEventArgs e)
         {
             this.Header.Text = string.Format("{0} {1}", node.Labels[0], node.Properties["Name"] as string);
             properties.Add(new PropertyItem() { Key = "Id", Value = node.Id.ToString() });

tools/Graph Explorer/GraphExplorer/Views/TableInformationControl.xaml.cs

@@ -55,7 +55,7 @@ namespace SocratexGraphExplorer.Views
             this.SourceEditorBox.Content = this.ClassEditor;
         }
 
-        private async void UserControl_Loaded(object sender, RoutedEventArgs e)
+        private void UserControl_Loaded(object sender, RoutedEventArgs e)
         {
             this.Header.Text = string.Format("{0} {1}", node.Labels[0], node.Properties["Name"] as string);
             properties.Add(new PropertyItem() { Key = "Id", Value = node.Id.ToString() });