* Added validation to not generate more than one PackingList to the same WZ

* Added filtering when found more than one item after scanning

OrdersManagement/Components/Pages/Warehouse.razor

@@ -94,6 +94,17 @@
                 <DialogButton Content="OK" IsPrimary="true" OnClick="@HideModal"/>
             </DialogButtons>
         </SfDialog>
+
+        <SfDialog Width="500px" Title="Błąd" IsModal="true" @bind-Visible="VisibilityError" AllowPrerender="true">
+            <DialogTemplates>
+                <Content>
+                    <p>Błąd: Dla zaznaczonego rekordu istnieje już PackingList!</p>
+                </Content>
+            </DialogTemplates>
+            <DialogButtons>
+                <DialogButton Content="OK" IsPrimary="true" OnClick="@HideModal"/>
+            </DialogButtons>
+        </SfDialog>
         
         <CardFooter>
             <small class="text-muted">FA Krosno Manager © @(DateTime.Now.Year)</small>
@@ -115,6 +126,7 @@
     private bool _isVisible;
     
     private bool Visibility { get; set; }
+    private bool VisibilityError { get; set; }
 
     protected override async Task OnAfterRenderAsync(bool firstRender)
     {
@@ -178,12 +190,20 @@
             return;
         }
 
+        string wzNumbers = string.Join(", ",selectedRecords.Select(x => x.MTGroupNum).Distinct());
+
+        if (_wzHeaders.Any(x => x.WzNumbers == wzNumbers))
+        {
+            VisibilityError = true;
+            return;
+        }
+        
         WzHeaderDto wzHeader = new WzHeaderDto
         {
             ID = Guid.NewGuid(),
             FK_Client = _selectedClient?.ID,
             CreatedDate = DateTime.Now,
-            WzNumbers = string.Join(", ",selectedRecords.Select(x => x.MTGroupNum).Distinct())
+            WzNumbers = wzNumbers
         };
 
         await WarehouseService.CreateWzHeaderAsync(wzHeader);
@@ -223,5 +243,6 @@
     private void HideModal()
     {
         Visibility = false;
+        VisibilityError = false;
     }
 }