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61 lines
1.3 KiB
61 lines
1.3 KiB
---
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sidebar_position: 2
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title: Changing the data service
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---
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In order to take into account the deletion of an element, we will first add this functionality to our data service.
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## Add method to interface
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Open the `Services/IDataService.cs` file and add the highlighted item:
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```csharp title="Services/IDataService.cs"
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public interface IDataService
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{
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Task Add(ItemModel model);
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Task<int> Count();
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Task<List<Item>> List(int currentPage, int pageSize);
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Task<Item> GetById(int id);
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Task Update(int id, ItemModel model);
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// highlight-start
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Task Delete(int id);
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// highlight-end
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}
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```
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## Add method to implementation
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Open the `Services/DataLocalService.cs` file and add the following method:
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```csharp title="Services/DataLocalService.cs"
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...
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public async Task Delete(int id)
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{
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// Get the current data
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var currentData = await _localStorage.GetItemAsync<List<Item>>("data");
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// Get the item int the list
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var item = currentData.FirstOrDefault(w => w.Id == id);
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// Delete item in
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currentData.Remove(item);
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// Delete the image
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var imagePathInfo = new DirectoryInfo($"{_webHostEnvironment.WebRootPath}/images");
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var fileName = new FileInfo($"{imagePathInfo}/{item.Name}.png");
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if (fileName.Exists)
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{
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File.Delete(fileName.FullName);
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}
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// Save the data
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await _localStorage.SetItemAsync("data", currentData);
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}
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``` |