/// <summary>
/// Inserts a product in Nortwind.Products table.
/// </summary>
/// <param name="product">The product.</param>
/// <param name="dbCon">The database connection.</param>
private static void AddProduct(Product product, SqlConnection dbCon)
{
string query = "INSERT " +
"INTO Products(ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPrice, UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued)" +
" VALUES(" +
"@ProductName," +
"@SupplierID," +
"@CategoryID," +
"@QuantityPerUnit," +
"@UnitPrice," +
"@UnitsInStock," +
"@UnitsOnOrder," +
"@ReorderLevel," +
"@Discontinued)";
SqlCommand command = new SqlCommand(query, dbCon);
// Add Parameters
command.Parameters.AddWithValue("@ProductName", product.ProductName);
command.Parameters.AddWithValue("@QuantityPerUnit", product.QuantityPerUnit);
command.Parameters.AddWithValue("@Discontinued", product.Discontinued == true ? 1 : 0);
// Nullable params
SqlParameter sqlParameterSupplierID = new SqlParameter("@SupplierID", product.SupplierID);
if (product.SupplierID == null) sqlParameterSupplierID.Value = DBNull.Value;
command.Parameters.Add(sqlParameterSupplierID);
SqlParameter sqlParameterCategoryID = new SqlParameter("@CategoryID", product.CategoryID);
if (product.CategoryID == null) sqlParameterCategoryID.Value = DBNull.Value;
command.Parameters.Add(sqlParameterCategoryID);
SqlParameter sqlParameterUnitPrice = new SqlParameter("@UnitPrice", product.UnitPrice);
if (product.UnitPrice == null) sqlParameterUnitPrice.Value = DBNull.Value;
command.Parameters.Add(sqlParameterUnitPrice);
SqlParameter sqlParameterUnitsInStock = new SqlParameter("@UnitsInStock", product.UnitsInStock);
if (product.UnitsInStock == null) sqlParameterUnitsInStock.Value = DBNull.Value;
command.Parameters.Add(sqlParameterUnitsInStock);
SqlParameter sqlParameterUnitsOnOrder = new SqlParameter("@UnitsOnOrder", product.UnitsOnOrder);
if (product.UnitsOnOrder == null) sqlParameterUnitsOnOrder.Value = DBNull.Value;
command.Parameters.Add(sqlParameterUnitsOnOrder);
SqlParameter sqlParameterReorderLevel = new SqlParameter("@ReorderLevel", product.ReorderLevel);
if (product.ReorderLevel == null) sqlParameterReorderLevel.Value = DBNull.Value;
command.Parameters.Add(sqlParameterReorderLevel);
command.ExecuteNonQuery();
}
/* 04. Write a method that adds a new product in the products table in the Northwind database. Use a parameterized SQL command. */
/// <summary>
/// Mains this instance.
/// </summary>
public static void Main()
{
// Define connection properties.
SqlConnection dbCon = new SqlConnection(
"Server=localhost; " +
"Database=northwind; " +
"Integrated Security=true");
dbCon.Open();
// Read and print all categories and products.
using (dbCon)
{
Product testProduct = new Product(1, "Test Product", "100", false);
Product anotherTestProduct = new Product(2, "Test Product Two", "200", false, 1, 1, 10, 2, 20, 1);
AddProduct(testProduct, dbCon);
AddProduct(anotherTestProduct, dbCon);
Console.WriteLine("Done! Check The Table!");
}
}
