public static decimal GetTotalStandardCostByCategory(ProductCategory category)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <decimal> result = db.Products.Where(product => product.ProductSubcategory.ProductCategory.Name.Equals(category.Name))
.Select(product => product.StandardCost);
return(result.Sum());
}
}
public static string GetProductVendorByProductName(string productName)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <string> result = db.ProductVendors.Where(productVendor => productVendor.Product.Name.Equals(productName))
.Select(productVendor => productVendor.Vendor.Name);
return(result.Single());
}
}
public static List <Product> GetProductsWithRecentReviews(int howManyReviews)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <Product> result = db.ProductReviews.OrderByDescending(productReview => productReview.ReviewDate)
.Select(productReview => productReview.Product);
return(result.Take(howManyReviews).ToList());
}
}
public static List <Product> GetProductsByName(String namePart)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <Product> result = db.Products.Where(product => product.Name.Contains(namePart))
.Select(product => product);
return(result.ToList());
}
}
public static List <string> GetProtuctNamesByVendorName(String vendorName)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <string> result = db.ProductVendors.Where(productVendor => productVendor.Vendor.Name.Equals(vendorName))
.Select(productVendor => productVendor.Product.Name);
return(result.ToList());
}
}
public static List <Product> GetNProductsFromCategory(string categoryName, int n)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <Product> result = db.Products.OrderByDescending(product => product.Name)
.Where(product => product.ProductSubcategory.ProductCategory.Name.Equals(categoryName))
.Select(product => product);
return(result.Take(n).ToList());
}
}
public static List <Product> GetProductsWithRecentReviews(int howManyReviews)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <Product> result = from productReview in db.ProductReviews
orderby productReview.ReviewDate descending
select productReview.Product;
return(result.Take(howManyReviews).ToList());
}
}
public static decimal GetTotalStandardCostByCategory(ProductCategory category)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <decimal> result = from product in db.Products
where product.ProductSubcategory.ProductCategory.Name.Equals(category.Name)
select product.StandardCost;
return(result.Sum());
}
}
public static string GetProductVendorByProductName(string productName)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <string> result = from productVendor in db.ProductVendors
where productVendor.Product.Name.Equals(productName)
select productVendor.Vendor.Name;
return(result.Single());
}
}
public static List <string> GetProtuctNamesByVendorName(String vendorName)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <string> result = from productVendor in db.ProductVendors
where productVendor.Vendor.Name.Equals(vendorName)
select productVendor.Product.Name;
return(result.ToList());
}
}
public static List <Product> GetNRecentlyReviewedProductd(int howManyProducts)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <Product> result = db.Products.Join(db.ProductReviews, product => product.ProductID, review => review.ProductID, (product, review) => new { Product = product, Review = review })
.OrderByDescending(review => review.Review.ReviewDate)
.Select(product => product.Product);
return(result.Take(howManyProducts).ToList());
}
}
public static List <Product> GetProductsByName(String namePart)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <Product> result = from product in db.Products
where product.Name.Contains(namePart)
select product;
return(result.ToList());
}
}
public static List <Product> GetNProductsFromCategory(string categoryName, int n)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <Product> result = from product in db.Products
orderby product.Name descending
where product.ProductSubcategory.ProductCategory.Name.Equals(categoryName)
select product;
return(result.Take(n).ToList());
}
}
public static List <Product> GetNRecentlyReviewedProductd(int howManyProducts)
{
using (ProductDataContext db = new ProductDataContext())
{
IQueryable <Product> result = from product in db.Products
join review in db.ProductReviews on product.ProductID equals review.ProductID
orderby review.ReviewDate descending
select product;
return(result.Take(howManyProducts).ToList());
}
}
