public async Task AddProductAsync(Product product) {
List<Product> productList = await GetProductListFromFileAsync();
int nextId = productList.Max(p => p.Id) + 1;
product.Id = nextId;
productList.Add(product);
await SaveProductListToFileAsync(productList);
}
public void AddProduct(Product product)
{
int nextId = _productList.Max(p => p.Id) + 1;
product.Id = nextId;
_productList.Add(product);
session["ProductList"] = _productList;
}
public async Task UpdateProductAsync(Product product) {
List<Product> productList = await GetProductListFromFileAsync();
Product targetProduct = productList.AsQueryable().FirstOrDefault(p => p.Id == product.Id);
targetProduct.Name = product.Name;
targetProduct.Category = product.Category;
targetProduct.ListPrice = product.ListPrice;
targetProduct.Description = product.Description;
await SaveProductListToFileAsync(productList);
}
public void UpdateProduct(Product product)
{
Product targetProduct = _productList.FirstOrDefault(p => p.Id == product.Id);
targetProduct.Name = product.Name;
targetProduct.Category = product.Category;
targetProduct.ListPrice = product.ListPrice;
targetProduct.Description = product.Description;
session["ProductList"] = _productList;
}