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130 lines
3.1 KiB
130 lines
3.1 KiB
---
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sidebar_position: 6
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title: Using the model
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---
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## Using the model
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We are going to set up the code for editing an item.
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Open the file `Pages/Edit.razor.cs` and modify as follows:
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```csharp title="Pages/Edit.razor.cs"
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public partial class Edit
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{
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[Parameter]
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public int Id { get; set; }
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/// <summary>
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/// The default enchant categories.
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/// </summary>
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private List<string> enchantCategories = new List<string>() { "armor", "armor_head", "armor_chest", "weapon", "digger", "breakable", "vanishable" };
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/// <summary>
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/// The current item model
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/// </summary>
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private ItemModel itemModel = new()
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{
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EnchantCategories = new List<string>(),
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RepairWith = new List<string>()
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};
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/// <summary>
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/// The default repair with.
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/// </summary>
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private List<string> repairWith = new List<string>() { "oak_planks", "spruce_planks", "birch_planks", "jungle_planks", "acacia_planks", "dark_oak_planks", "crimson_planks", "warped_planks" };
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[Inject]
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public IDataService DataService { get; set; }
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[Inject]
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public NavigationManager NavigationManager { get; set; }
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[Inject]
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public IWebHostEnvironment WebHostEnvironment { get; set; }
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protected override async Task OnInitializedAsync()
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{
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var item = await DataService.GetById(Id);
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var fileContent = await File.ReadAllBytesAsync($"{WebHostEnvironment.WebRootPath}/images/default.png");
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if (File.Exists($"{WebHostEnvironment.WebRootPath}/images/{itemModel.Name}.png"))
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{
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fileContent = await File.ReadAllBytesAsync($"{WebHostEnvironment.WebRootPath}/images/{item.Name}.png");
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}
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// Set the model with the item
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itemModel = new ItemModel
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{
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Id = item.Id,
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DisplayName = item.DisplayName,
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Name = item.Name,
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RepairWith = item.RepairWith,
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EnchantCategories = item.EnchantCategories,
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MaxDurability = item.MaxDurability,
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StackSize = item.StackSize,
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ImageContent = fileContent
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};
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}
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private async void HandleValidSubmit()
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{
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await DataService.Update(Id, itemModel);
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NavigationManager.NavigateTo("list");
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}
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private async Task LoadImage(InputFileChangeEventArgs e)
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{
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// Set the content of the image to the model
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using (var memoryStream = new MemoryStream())
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{
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await e.File.OpenReadStream().CopyToAsync(memoryStream);
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itemModel.ImageContent = memoryStream.ToArray();
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}
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}
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private void OnEnchantCategoriesChange(string item, object checkedValue)
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{
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if ((bool)checkedValue)
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{
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if (!itemModel.EnchantCategories.Contains(item))
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{
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itemModel.EnchantCategories.Add(item);
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}
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return;
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}
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if (itemModel.EnchantCategories.Contains(item))
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{
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itemModel.EnchantCategories.Remove(item);
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}
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}
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private void OnRepairWithChange(string item, object checkedValue)
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{
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if ((bool)checkedValue)
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{
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if (!itemModel.RepairWith.Contains(item))
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{
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itemModel.RepairWith.Add(item);
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}
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return;
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}
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if (itemModel.RepairWith.Contains(item))
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{
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itemModel.RepairWith.Remove(item);
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}
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}
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}
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```
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The changes from the add page are:
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* Using the `OnInitializedAsync` method to retrieve the item relative to its identifier
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* Retrieve an item instead of creating a new one
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* Using template to modify data
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