Fix EditProspectDialog and Prospects: prevent multiple modal openings during save and create operations

FoodsharingSiegen.Server/Dialogs/EditProspectDialog.razor.cs

@@ -82,10 +82,16 @@ namespace FoodsharingSiegen.Server.Dialogs
 
         #region Private Method SaveClick
 
+        private bool _isSaving;
+
         /// <summary>
         ///     Saves the click (a. beging, 31.05.2022)
         /// </summary>
         private async Task SaveClick()
+        {
+            if (_isSaving) return;
+            _isSaving = true;
+            try
             {
                 if (IsUpdateMode)
                 {
@@ -100,6 +106,11 @@ namespace FoodsharingSiegen.Server.Dialogs
 
                 await ModalService.Hide();
             }
+            finally
+            {
+                _isSaving = false;
+            }
+        }
 
         #endregion
     }

FoodsharingSiegen.Server/Pages/Prospects.razor.cs

@@ -56,14 +56,25 @@ namespace FoodsharingSiegen.Server.Pages
 
         #region Private Method CreateProspectAsync
 
+        private bool _isOpeningModal;
+
         /// <summary>
         ///     Asynchronously creates a new prospect by displaying the AddProspectModal dialog and refreshing the prospect list.
         /// </summary>
         /// <returns>A task that represents the asynchronous operation.</returns>
         private async Task CreateProspectAsync()
+        {
+            if (_isOpeningModal) return;
+            _isOpeningModal = true;
+            try
             {
                 await EditProspectDialog.ShowAsync(ModalService, LoadProspects);
             }
+            finally
+            {
+                _isOpeningModal = false;
+            }
+        }
 
         #endregion