public static async Task ReadProducts()
{
using (var context = new ProductsContext())
{
//lay all sp
var products = await context.products.ToListAsync();
foreach (var product in products)
{
Console.WriteLine($"{product.ProductId} {product.Name} ({product.Provider})");
}
Console.WriteLine();
//Lay all sp cung cap boi cty A
products = await(from p in context.products
where (p.Provider == "CTY A")
select p
)
.ToListAsync();
Console.WriteLine("Sản phẩm CTY A");
foreach (var product in products)
{
Console.WriteLine($"{product.ProductId,2} {product.Name,10} - {product.Provider}");
}
}
}
public static async Task InsertProduct()
{
using (var context = new ProductsContext())
{
//await context.Products.AddAsync(new Product {
// Name = "San pham 1",
// Provider = "Cong ty 1"
//});
//await context.Products.AddAsync(new Product
//{
// Name = "San pham 2",
// Provider = "Cong ty 2"
//});
var p1 = new Product()
{
Name = "Sản phẩm 3", Provider = "CTY A"
};
var p2 = new Product()
{
Name = "Sản phẩm 4", Provider = "CTY A"
};
var p3 = new Product()
{
Name = "Sản phẩm 5", Provider = "CTY B"
};
await context.AddRangeAsync(new object[] { p1, p2, p3 });
int rows = await context.SaveChangesAsync();
Console.WriteLine($"Da luu {rows} san pham");
}
}
public static async Task CreateDatabase()
{
using (var dbcontext = new ProductsContext())
{
String databaseName = dbcontext.Database.GetDbConnection().Database;
Console.WriteLine("Tao " + databaseName);
bool result = await dbcontext.Database.EnsureCreatedAsync();
string resultstring = result ? "tạo thành công" : "đã có trước đó";
Console.WriteLine($"CSDL {databaseName} : {resultstring}");
}
}
public static async Task DeleteDatabase()
{
using (var context = new ProductsContext())
{
string databaseName = context.Database.GetDbConnection().Database;
Console.WriteLine($"Co chan chan xoa {databaseName}? (y)");
string input = Console.ReadLine();
if (input.ToLower() == "y")
{
bool deleted = await context.Database.EnsureDeletedAsync();
string deletionInfo = deleted ? "đã xóa" : "không xóa được";
Console.WriteLine($"{databaseName} {deletionInfo}");
}
}
}
public static async Task RenameProduct(int id, string newName)
{
using (var context = new ProductsContext())
{
//Timf kiem
var product = await(from p in context.products
where (p.ProductId == id)
select p).FirstOrDefaultAsync();
//doi ten
if (product != null)
{
product.Name = newName;
Console.WriteLine($"{product.ProductId} co ten moi {product.Name}");
await context.SaveChangesAsync();
}
}
}
