Move application files to sub-folder

Application/Options/CategoryWindow.xaml.cs

@@ -0,0 +1,64 @@
+using Common.Wpf.Extensions;
+using System.Linq;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+
+namespace FeedCenter.Options
+{
+    public partial class CategoryWindow
+    {
+        public CategoryWindow()
+        {
+            InitializeComponent();
+        }
+
+        public bool? Display(Category category, Window owner)
+        {
+            // Set the data context
+            DataContext = category;
+
+            // Set the title based on the state of the category
+            Title = string.IsNullOrWhiteSpace(category.Name) ? Properties.Resources.CategoryWindowAdd : Properties.Resources.CategoryWindowEdit;
+
+            // Set the window owner
+            Owner = owner;
+
+            // Show the dialog and result the result
+            return ShowDialog();
+        }
+
+        private void HandleOkayButtonClick(object sender, RoutedEventArgs e)
+        {
+            // Get a list of all explicit binding expressions
+            var bindingExpressions = this.GetBindingExpressions(new[] { UpdateSourceTrigger.Explicit });
+
+            // Loop over each binding expression and clear any existing error
+            bindingExpressions.ForEach(b => Validation.ClearInvalid(b.BindingExpression));
+
+            // Force all explicit bindings to update the source
+            bindingExpressions.ForEach(bindingExpression => bindingExpression.BindingExpression.UpdateSource());
+
+            // See if there are any errors
+            var hasError = bindingExpressions.Exists(bindingExpression => bindingExpression.BindingExpression.HasError);
+
+            // If there was an error then set focus to the bad controls
+            if (hasError)
+            {
+                // Get the first framework element with an error
+                var firstErrorElement = bindingExpressions.First(b => b.BindingExpression.HasError).FrameworkElement;
+
+                // Set focus
+                firstErrorElement.Focus();
+
+                return;
+            }
+
+            // Dialog is good
+            DialogResult = true;
+
+            // Close the dialog
+            Close();
+        }
+    }
+}