bizarre l'erreur dans index razor cs 😵

CetteAppliVaMarcher/CetteAppliVaMarcher/Components/Crafting.razor

@@ -0,0 +1,51 @@
+<CascadingValue Value="@this">
+    <div class="container">
+        <div class="row">
+            <div class="col-6">
+                
+                <div>Available items:</div>
+                <div>
+                    <div class="css-grid">
+                        
+                        @foreach (var item in Items)
+                        {
+                            <CraftingItem Item="item" NoDrop="true"/>
+                        }
+                    </div>
+                </div>
+
+            </div>
+
+            <div class="col-6">
+                <div>Recipe</div>
+                
+                <div>
+                    
+                    <div class="css-recipe">
+                        <CraftingItem Index="0"/>
+                        <CraftingItem Index="1"/>
+                        <CraftingItem Index="2"/>
+                        <CraftingItem Index="3"/>
+                        <CraftingItem Index="4"/>
+                        <CraftingItem Index="5"/>
+                        <CraftingItem Index="6"/>
+                        <CraftingItem Index="7"/>
+                        <CraftingItem Index="8"/>
+                    </div>
+                </div>
+                
+                <div>Result</div>
+                <div>
+                    <CraftingItem Item="RecipeResult"/>
+                </div>
+            </div>
+
+            <div class="col-12">
+                <div>Actions</div>
+                <div class="actions" id="actions">
+
+                </div>
+            </div>
+        </div>
+    </div>
+</CascadingValue>

CetteAppliVaMarcher/CetteAppliVaMarcher/Components/Crafting.razor.cs

@@ -0,0 +1,80 @@
+using CetteAppliVaMarcher.Models;
+using Microsoft.AspNetCore.Components;
+using Microsoft.JSInterop;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+
+namespace CetteAppliVaMarcher.Components
+{
+    public partial class Crafting
+    {
+        private Item _recipeResult;
+
+        public Crafting()
+        {
+            Actions = new ObservableCollection<CraftingAction>();
+            Actions.CollectionChanged += OnActionsCollectionChanged;
+            this.RecipeItems = new List<Item> { null, null, null, null, null, null, null, null, null };
+        }
+
+        public ObservableCollection<CraftingAction> Actions { get; set; }
+        public Item CurrentDragItem { get; set; }
+
+        [Parameter]
+        public List<Item> Items { get; set; }
+
+        public List<Item> RecipeItems { get; set; }
+
+        public Item RecipeResult
+        {
+            get => this._recipeResult;
+            set
+            {
+                if (this._recipeResult == value)
+                {
+                    return;
+                }
+
+                this._recipeResult = value;
+                this.StateHasChanged();
+            }
+        }
+
+        [Parameter]
+        public List<CraftingRecipe> Recipes { get; set; }
+
+        /// <summary>
+        /// Gets or sets the java script runtime.
+        /// </summary>
+        [Inject]
+        internal IJSRuntime JavaScriptRuntime { get; set; }
+
+        public void CheckRecipe()
+        {
+            RecipeResult = null;
+
+            // Get the current model
+            var currentModel = string.Join("|", this.RecipeItems.Select(s => s != null ? s.Name : string.Empty));
+
+            this.Actions.Add(new CraftingAction { Action = $"Items : {currentModel}" });
+
+            foreach (var craftingRecipe in Recipes)
+            {
+                // Get the recipe model
+                var recipeModel = string.Join("|", craftingRecipe.Have.SelectMany(s => s));
+
+                this.Actions.Add(new CraftingAction { Action = $"Recipe model : {recipeModel}" });
+
+                if (currentModel == recipeModel)
+                {
+                    RecipeResult = craftingRecipe.Give;
+                }
+            }
+        }
+
+        private void OnActionsCollectionChanged(object? sender, NotifyCollectionChangedEventArgs e)
+        {
+            JavaScriptRuntime.InvokeVoidAsync("Crafting.AddActions", e.NewItems);
+        }
+    }
+}

CetteAppliVaMarcher/CetteAppliVaMarcher/Components/Crafting.razor.css

@@ -0,0 +1,19 @@
+.css-grid {
+    grid-template-columns: repeat(4,minmax(0,1fr));
+    gap: 10px;
+    display: grid;
+    width: 286px;
+}
+
+.css-recipe {
+    grid-template-columns: repeat(3,minmax(0,1fr));
+    gap: 10px;
+    display: grid;
+    width: 212px;
+}
+
+.actions {
+    border: 1px solid black;
+    height: 250px;
+    overflow: scroll;
+}

CetteAppliVaMarcher/CetteAppliVaMarcher/Components/Crafting.razor.js

@@ -0,0 +1,16 @@
+window.Crafting =
+{
+    AddActions: function (data) {
+
+        data.forEach(element => {
+            var div = document.createElement('div');
+            div.innerHTML = 'Action: ' + element.action + ' - Index: ' + element.index;
+
+            if (element.item) {
+                div.innerHTML += ' - Item Name: ' + element.item.name;
+            }
+
+            document.getElementById('actions').appendChild(div);
+        });
+    }
+}

CetteAppliVaMarcher/CetteAppliVaMarcher/Components/CraftingAction.cs

@@ -0,0 +1,11 @@
+using CetteAppliVaMarcher.Models;
+
+namespace CetteAppliVaMarcher.Components
+{
+    public class CraftingAction
+    {
+        public string Action { get; set; }
+        public int Index { get; set; }
+        public Item Item { get; set; }
+    }
+}

CetteAppliVaMarcher/CetteAppliVaMarcher/Components/CraftingItem.razor

@@ -0,0 +1,14 @@
+<div
+    class="item"
+    ondragover="event.preventDefault();"
+    draggable="true"
+    @ondragstart="@OnDragStart"
+    @ondrop="@OnDrop"
+    @ondragenter="@OnDragEnter"
+    @ondragleave="@OnDragLeave">
+
+    @if (Item != null)
+    {
+        @Item.DisplayName
+    }
+</div>

CetteAppliVaMarcher/CetteAppliVaMarcher/Components/CraftingItem.razor.cs

@@ -0,0 +1,63 @@
+using CetteAppliVaMarcher.Models;
+using Microsoft.AspNetCore.Components;
+
+namespace CetteAppliVaMarcher.Components
+{
+    public partial class CraftingItem
+    {
+        [Parameter]
+        public int Index { get; set; }
+
+        [Parameter]
+        public Item Item { get; set; }
+
+        [Parameter]
+        public bool NoDrop { get; set; }
+
+        [CascadingParameter]
+        public Crafting Parent { get; set; }
+
+        internal void OnDragEnter()
+        {
+            if (NoDrop)
+            {
+                return;
+            }
+
+            Parent.Actions.Add(new CraftingAction { Action = "Drag Enter", Item = this.Item, Index = this.Index });
+        }
+
+        internal void OnDragLeave()
+        {
+            if (NoDrop)
+            {
+                return;
+            }
+
+            Parent.Actions.Add(new CraftingAction { Action = "Drag Leave", Item = this.Item, Index = this.Index });
+        }
+
+        internal void OnDrop()
+        {
+            if (NoDrop)
+            {
+                return;
+            }
+
+            this.Item = Parent.CurrentDragItem;
+            Parent.RecipeItems[this.Index] = this.Item;
+
+            Parent.Actions.Add(new CraftingAction { Action = "Drop", Item = this.Item, Index = this.Index });
+
+            // Check recipe
+            Parent.CheckRecipe();
+        }
+
+        private void OnDragStart()
+        {
+            Parent.CurrentDragItem = this.Item;
+
+            Parent.Actions.Add(new CraftingAction { Action = "Drag Start", Item = this.Item, Index = this.Index });
+        }
+    }
+}

CetteAppliVaMarcher/CetteAppliVaMarcher/Components/CraftingItem.razor.css

@@ -0,0 +1,6 @@
+.item {
+    width: 64px;
+    height: 64px;
+    border: 1px solid;
+    overflow: hidden;
+}

CetteAppliVaMarcher/CetteAppliVaMarcher/Components/CraftingRecipe.cs

@@ -0,0 +1,10 @@
+using CetteAppliVaMarcher.Models;
+
+namespace CetteAppliVaMarcher.Components
+{
+    public class CraftingRecipe
+    {
+        public Item Give { get; set; }
+        public List<List<string>> Have { get; set; }
+    }
+}

CetteAppliVaMarcher/CetteAppliVaMarcher/Pages/Index.razor

@@ -9,6 +9,10 @@ Welcome to your new app.
 
 <SurveyPrompt Title="How is Blazor working for you?" />
 
+<div>
+    <Crafting Items="Items" Recipes="Recipes" />
+</div>
+
 <p>
     <b>CurrentCulture</b>: @CultureInfo.CurrentCulture
 </p>

CetteAppliVaMarcher/CetteAppliVaMarcher/Pages/Index.razor.cs

@@ -0,0 +1,22 @@
+using CetteAppliVaMarcher.Components;
+using CetteAppliVaMarcher.Models;
+using CetteAppliVaMarcher.Services;
+using Microsoft.AspNetCore.Components;
+
+public partial class Index
+{
+    [Inject]
+    public IDataService DataService { get; set; }
+
+    public List<Item> Items { get; set; } = new List<Item>();
+
+    private List<CraftingRecipe> Recipes { get; set; } = new List<CraftingRecipe>();
+
+    protected override async Task OnInitializedAsync()
+    {
+        await base.OnInitializedAsync();
+
+        Items = await DataService.List(0, await DataService.Count());
+        Recipes = await DataService.GetRecipes();
+    }
+}

CetteAppliVaMarcher/CetteAppliVaMarcher/Pages/_Layout.cshtml

@@ -35,6 +35,7 @@
     <link href="_content/Blazored.Modal/blazored-modal.css" rel="stylesheet" />
 
     <script src="_content/Blazored.Modal/blazored.modal.js"></script>
+    <script src="Components/Crafting.razor.js"></script>
 
 </body>
 </html>

CetteAppliVaMarcher/CetteAppliVaMarcher/Services/DataLocalService.cs

@@ -1,4 +1,5 @@
 using Blazored.LocalStorage;
+using CetteAppliVaMarcher.Components;
 using CetteAppliVaMarcher.Factories;
 using CetteAppliVaMarcher.Models;
 using Microsoft.AspNetCore.Components;
@@ -159,5 +160,23 @@ namespace CetteAppliVaMarcher.Services
             // Save the data
             await _localStorage.SetItemAsync("data", currentData);
         }
+        public Task<List<CraftingRecipe>> GetRecipes()
+        {
+            var items = new List<CraftingRecipe>
+        {
+            new CraftingRecipe
+            {
+                Give = new Item { DisplayName = "Diamond", Name = "diamond" },
+                Have = new List<List<string>>
+                {
+                    new List<string> { "dirt", "dirt", "dirt" },
+                    new List<string> { "dirt", null, "dirt" },
+                    new List<string> { "dirt", "dirt", "dirt" }
+                }
+            }
+        };
+
+            return Task.FromResult(items);
+        }
     }
 }

CetteAppliVaMarcher/CetteAppliVaMarcher/Services/IDataServices.cs

@@ -1,4 +1,5 @@
-using CetteAppliVaMarcher.Models;
+using CetteAppliVaMarcher.Components;
+using CetteAppliVaMarcher.Models;
 
 namespace CetteAppliVaMarcher.Services
 {
@@ -10,5 +11,6 @@ namespace CetteAppliVaMarcher.Services
         Task<Item> GetById(int id);
         Task Update(int id, ItemModel model);
         Task Delete(int id);
+        Task<List<CraftingRecipe>>GetRecipes();
     }
 }