From b9838da76bb6167f01475d8b456fca4ba1c17b3b Mon Sep 17 00:00:00 2001
From: Lorenz Stechauner <lorenz.stechauner@necronda.net>
Date: Sun, 13 Oct 2024 21:45:12 +0200
Subject: [PATCH] [#57] AreaComAdminWindow: Use Task.Run()

---
 Elwig/Services/AreaComService.cs         | 16 ++++++++++++++--
 Elwig/Windows/AreaComAdminWindow.xaml.cs | 14 +++++---------
 2 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/Elwig/Services/AreaComService.cs b/Elwig/Services/AreaComService.cs
index 86eb4e9..c0d3853 100644
--- a/Elwig/Services/AreaComService.cs
+++ b/Elwig/Services/AreaComService.cs
@@ -108,7 +108,8 @@ namespace Elwig.Services {
         public static async Task<int> UpdateAreaCommitment(this AreaComAdminViewModel vm, int? oldFbNr) {
             int newFbNr = (int)vm.FbNr!;
 
-            using (var ctx = new AppDbContext()) {
+            await Task.Run(async () => {
+                using var ctx = new AppDbContext();
                 var a = new AreaCom {
                     FbNr = oldFbNr ?? newFbNr,
                     MgNr = (int)vm.MgNr!,
@@ -140,7 +141,7 @@ namespace Elwig.Services {
                 if (newFbNr != a.FbNr) {
                     await ctx.Database.ExecuteSqlAsync($"UPDATE area_commitment SET fbnr = {newFbNr} WHERE fbnr = {oldFbNr}");
                 }
-            }
+            });
 
             App.HintContextChange();
 
@@ -253,5 +254,16 @@ namespace Elwig.Services {
             }
             return grid;
         }
+
+        public static async Task DeleteAreaCom(int fbnr) {
+            await Task.Run(async () => {
+                using var ctx = new AppDbContext();
+                var l = (await ctx.AreaCommitments.FindAsync(fbnr))!;
+                ctx.Remove(l);
+                await ctx.SaveChangesAsync();
+            });
+
+            App.HintContextChange();
+        }
     }
 }
diff --git a/Elwig/Windows/AreaComAdminWindow.xaml.cs b/Elwig/Windows/AreaComAdminWindow.xaml.cs
index 2b3c17f..f8b94b6 100644
--- a/Elwig/Windows/AreaComAdminWindow.xaml.cs
+++ b/Elwig/Windows/AreaComAdminWindow.xaml.cs
@@ -203,13 +203,9 @@ namespace Elwig.Windows {
                 $"Soll die Flächenbindung {a.GstNr} ({a.Area} m²) wirklich unwiderruflich gelöscht werden?",
                 "Flächenbindung löschen", MessageBoxButton.OKCancel, MessageBoxImage.Warning, MessageBoxResult.Cancel);
             if (r == MessageBoxResult.OK) {
-                Mouse.OverrideCursor = Cursors.AppStarting;
+                Mouse.OverrideCursor = Cursors.Wait;
                 try {
-                    using (var ctx = new AppDbContext()) {
-                        ctx.Remove(a);
-                        await ctx.SaveChangesAsync();
-                    }
-                    App.HintContextChange();
+                    await AreaComService.DeleteAreaCom(a.FbNr);
                 } catch (Exception exc) {
                     var str = "Der Eintrag konnte nicht in der Datenbank aktualisiert werden!\n\n" + exc.Message;
                     if (exc.InnerException != null) str += "\n\n" + exc.InnerException.Message;
@@ -227,7 +223,7 @@ namespace Elwig.Windows {
 
         private async void AreaCommitmentSaveButton_Click(object? sender, RoutedEventArgs? evt) {
             AreaCommitmentSaveButton.IsEnabled = false;
-            Mouse.OverrideCursor = Cursors.AppStarting;
+            Mouse.OverrideCursor = Cursors.Wait;
 
             int fbnr;
             try {
@@ -237,9 +233,8 @@ namespace Elwig.Windows {
                 if (exc.InnerException != null) str += "\n\n" + exc.InnerException.Message;
                 MessageBox.Show(str, "Flächenbindung aktualisieren", MessageBoxButton.OK, MessageBoxImage.Error);
                 AreaCommitmentSaveButton.IsEnabled = true;
-                return;
-            } finally {
                 Mouse.OverrideCursor = null;
+                return;
             }
 
             IsEditing = false;
@@ -252,6 +247,7 @@ namespace Elwig.Windows {
             FinishInputFilling();
             await RefreshList();
             RefreshInputs();
+            Mouse.OverrideCursor = null;
             ViewModel.SearchQuery = "";
             ControlUtils.SelectItem(AreaCommitmentList, AreaCommitmentList.ItemsSource.Cast<AreaCom>().Where(a => a.FbNr == fbnr).FirstOrDefault());
         }