Navigate back to same selected city on servers page after editing a server.

ServerManagement/Components/Controls/CityListComponent.razor

@@ -10,18 +10,19 @@
         city="@city"
         selectedCity="@this.selectedCity"
         SelectCityCallBack="HandleCitySelection">
-        </CityComponent>
+      </CityComponent>
       }
     </div>
   </div>
 }
 
 @code {
-  private string selectedCity = "Eindhoven";
   private List<string> cities = ServersRepository.GetCities();
 
   [Parameter]
   public EventCallback<string> SelectCityCallBack { get; set; }
+  [Parameter]
+  public string? selectedCity { get; set; } = "Eindhoven";
 
   public void ClearSelection()
   {

ServerManagement/Components/Pages/AddServer.razor

@@ -54,6 +54,6 @@
     }
 
     // An exception is raised when debugging from VS Code, but not when using dotnet watch.
-    NavigationManager.NavigateTo("/servers");
+    NavigationManager.NavigateTo($"/servers/back_from/{this.server?.City}");
   }
 }

ServerManagement/Components/Pages/EditServer.razor

@@ -74,7 +74,7 @@ The navigation manager only will respond correctly if all its behaviours are the
     }
 
     // An exception is raised when debugging from VS Code, but not when using dotnet watch.
-    NavigationManager.NavigateTo("/servers");
+    NavigationManager.NavigateTo($"/servers/back_from/{this.server?.City}");
   }
 
   private async Task OnBeforeInternalNavigation(LocationChangingContext context)

ServerManagement/Components/Pages/Servers.razor

@@ -1,10 +1,16 @@
 @page "/servers"
+@page "/servers/back_from/{cityName}"
 @using ServerManagement.Components.Controls
+@inject NavigationManager NavigationManager
 
 <h3>Servers</h3>
 <br/>
 <br/>
-<CityListComponent @ref="cityListComponent" SelectCityCallBack="HandleCitySelection"></CityListComponent>
+<CityListComponent
+  @ref="cityListComponent"
+  SelectCityCallBack="HandleCitySelection"
+  selectedCity="@this.selectedCity">
+</CityListComponent>
 <br/>
 <SearchBarComponent
   @ref="searchBarComponent"
@@ -23,6 +29,8 @@
 </CascadingValue>
 
 @code {
+  [Parameter]
+  public string? CityName { get; set; }
   private string selectedCity = "Eindhoven";
   private string searchFilter = "";
   private CityListComponent? cityListComponent;
@@ -40,4 +48,16 @@
     this.searchFilter = searchFilter;
     cityListComponent?.ClearSelection();
   }
+
+  protected override void OnAfterRender(bool firstRender)
+  {
+    if (firstRender)
+    {
+      if (NavigationManager.Uri.Contains("back_from") && !string.IsNullOrWhiteSpace(CityName))
+      {
+        selectedCity = CityName;
+        StateHasChanged();
+      }
+    }
+  }
 }