public int UpdateProductsCategory(int categoryID, ProductCategory newCategory)
{
Debug.Write(">>> Updating a products category ... ");
DBStockCTX stockDB = new DBStockCTX();
/*
* // 1st method: with a query
* // init a query
* var query = from prodCat in stockDB.productscategories
* where prodCat.id == categoryID
* select prodCat;
*
* // get the searched element
* ProductCategory category = query.FirstOrDefault<ProductCategory>();
*
* // 2nd method: without a query, use find method
* ProductCategory prodCat = stockDB.productscategories.Find(categoryID);
*
* prodCat.name = newCategory.name;
* prodCat.description = newCategory.description;
* prodCat.products = newCategory.products;
*/
// 3rd method: using attach method
stockDB.productscategories.Attach(newCategory);
stockDB.Entry(newCategory).State = EntityState.Modified;
stockDB.SaveChanges();
Debug.WriteLine("Done.");
return(0);
}
public int UpdateProduct(int productID, Product newProduct)
{
// PS: there is some exceptions to catch ie: null, ...
Debug.Write(">>> Updating a new product ... ");
try
{
DBStockCTX stockDB = new DBStockCTX();
/*
* // 1st method: with a query
* // init a query
* var query = from prod in stockDB.products
* where prod.id == productID
* select prod;
*
* // get the searched element
* Product product = query.FirstOrDefault<Product>();
*
* // 2nd method: without a query, use find method
* Product prod = stockDB.products.Find(productID);
* prod.name = newProduct.name;
* prod.description = newProduct.description;
* prod.price = newProduct.price;
* prod.category = newProduct.category;
*/
// 3rd method: using attach method
stockDB.products.Attach(newProduct);
stockDB.Entry(newProduct).State = EntityState.Modified;
stockDB.SaveChanges();
}
catch (Exception ex)
{
Debug.WriteLine("Error:");
Console.WriteLine(ex.Message);
return(1);
}
Debug.WriteLine("Done.");
return(0);
}