Port Form1 to Avalonia

Source/LibationWinForms/AvaloniaUI/Views/MainWindow/MainWindow.Export.axaml.cs

@@ -0,0 +1,52 @@
+using ApplicationServices;
+using Avalonia.Controls;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace LibationWinForms.AvaloniaUI.Views
+{
+	//DONE
+	public partial class MainWindow
+	{
+		private void Configure_Export() { }
+
+		public void exportLibraryToolStripMenuItem_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
+		{
+			try
+			{
+				var saveFileDialog = new System.Windows.Forms.SaveFileDialog
+				{
+					Title = "Where to export Library",
+					Filter = "Excel Workbook (*.xlsx)|*.xlsx|CSV files (*.csv)|*.csv|JSON files (*.json)|*.json" // + "|All files (*.*)|*.*"
+				};
+
+				if (saveFileDialog.ShowDialog() != System.Windows.Forms.DialogResult.OK)
+					return;
+
+				// FilterIndex is 1-based, NOT 0-based
+				switch (saveFileDialog.FilterIndex)
+				{
+					case 1: // xlsx
+					default:
+						LibraryExporter.ToXlsx(saveFileDialog.FileName);
+						break;
+					case 2: // csv
+						LibraryExporter.ToCsv(saveFileDialog.FileName);
+						break;
+					case 3: // json
+						LibraryExporter.ToJson(saveFileDialog.FileName);
+						break;
+				}
+
+				System.Windows.Forms.MessageBox.Show("Library exported to:\r\n" + saveFileDialog.FileName);
+			}
+			catch (Exception ex)
+			{
+				MessageBoxLib.ShowAdminAlert(null, "Error attempting to export your library.", "Error exporting", ex);
+			}
+		}
+	}
+}