static List <Customer> GetTopNCustomersSortedByLastName(int n)
{
using (var db = new AdventureWorksEntities())
{
return(db.Customers.OrderBy(customer => customer.LastName).ThenBy(customer => customer.FirstName).Take(n).ToList());
}
}
static List <Customer> GetCustomers()
{
using (var db = new AdventureWorksEntities())
{
return(db.Customers.ToList());
}
}
public static void removeproductrecord(int productid)
{
using (var context = new AdventureWorksEntities())
{
var product = context.Products.Find(productid);
context.Products.Remove(product);
context.SaveChanges();
}
}
public static void updateproductrecord(int productid)
{
using (var context = new AdventureWorksEntities())
{
var product = context.Products.Find(productid);
product.Name = "Steve Bruce Buffer fasa";
context.SaveChanges();
}
}
public static Product findproduct()
{
var product = new Product();
using (var context = new AdventureWorksEntities())
{
product = context.Products.Find(context.Products.AsEnumerable <Product>().Last().ProductID);
}
return(product);
}
static List <string> GetCustomerNames()
{
using (var db = new AdventureWorksEntities())
{
var names = new List <string> {
};
var customers = db.Customers;
foreach (Customer customer in customers)
{
names.Add($"{customer.FirstName} {customer.LastName}");
}
return(names);
}
}
public static async Task PerformDatabaseOperations()
{
using (var db = new AdventureWorksEntities())
{
// Create a new blog and save it
try
{
db.Products.Add(new Product
{
ProductID = db.Products.Last().ProductID + 1,
Name = "New Product 3580",
ProductNumber = "3580",
Color = "Reddish",
StandardCost = new decimal(1000.97),
ListPrice = new decimal(2000),
Size = "Large",
ThumbNailPhoto = new byte[100],
ThumbnailPhotoFileName = "FileName",
ProductCategory = db.ProductCategories.First <ProductCategory>(),
ProductModel = db.ProductModels.First()
});
}
catch (Exception e)
{
Console.WriteLine("No able to add Product");
}
Console.WriteLine("Adding product to Context");
try
{
await db.SaveChangesAsync();
}
catch
{
Console.WriteLine("Underlying data bad");
}
}
}
static void Main(string[] args)
{
//var task = PerformDatabaseOperations();
//while (task.Status != TaskStatus.RanToCompletion)
//{
// Console.WriteLine("Query execution is going on ");
//}
//Console.WriteLine("Query execution completed");
// LinqQueries();
using (var context = new AdventureWorksEntities())
{
foreach (var c in ReturnCustomerAsync().Result)
{
Console.WriteLine(c.CustomerID);
}
}
// inserting into products table
// insertproductrecord();
//var product = findproduct();
//updateproductrecord(product.ProductID);
//removeproductrecord(product.ProductID);
}
public static void insertproductrecord()
{
using (var context = new AdventureWorksEntities())
{
var product = new Product()
{
ProductID = context.Products.AsEnumerable <Product>().Last().ProductID + 1,
Name = "New Product 16",
ProductNumber = "156",
Color = "Red",
StandardCost = new decimal(1000.97),
ListPrice = new decimal(2000),
Size = "Large",
ThumbNailPhoto = new byte[100],
ThumbnailPhotoFileName = "FileName",
ProductCategory = context.ProductCategories.First <ProductCategory>(),
ProductModel = context.ProductModels.First()
};
context.Products.Add(product);
context.SaveChanges();
context.Database.Log = x => System.Diagnostics.Debug.WriteLine(x);
}
}
public static void LinqQueries()
{
using (var context = new AdventureWorksEntities())
{
#region Using Stored Procedure
foreach (var c in context.Customers)
{
var CustomerAddresses = context.GetCustomeAddressById(c.CustomerID);
foreach (var ca in CustomerAddresses)
{
Console.WriteLine(ca.CustomerId + " " + ca.FirstName + " " + ca.LastName + " " + ca.CompanyName + " " + ca.City + " " + ca.CountryRegion);
}
}
#endregion
#region module 6 lab 1
Console.WriteLine("Products with Listprice more than average of unit price of all products");
var prodlphigherthansp = from p in context.Products
where p.ListPrice > context.SalesOrderDetails.Average(a => a.UnitPrice)
select new
{
ProductId = p.ProductID,
Name = p.Name
};
foreach (var p in prodlphigherthansp)
{
Console.WriteLine(p.Name + " ");
}
#endregion
#region module 6 lab 2
Console.WriteLine("Products with Listprice more than 100 and Unit Price less than 100");
var innerquery = context.SalesOrderDetails.Where(a => a.UnitPrice < 100).Select(a => a.ProductID);
var q = from t1 in context.Products
where innerquery.Contains(t1.ProductID) && t1.ListPrice > 100
select new
{
t1.ProductID, t1.Name, t1.ListPrice
};
foreach (var p in q)
{
Console.WriteLine(p.ProductID + " " + p.Name + " " + p.ListPrice);
}
#endregion
#region moduel 6 lab 3
Console.WriteLine("Products along with average selling price of each");
var productsmorethan = context.Products.GroupJoin(context.SalesOrderDetails, a => a.ProductID, b => b.ProductID, (a, b) => new { ProductId = a.ProductID, Name = a.Name, StandardCost = a.StandardCost, ListPrice = a.ListPrice, AverageListPrice = b.Average(c => c.UnitPrice) }).Where(a => a.AverageListPrice > 0);
int count = 0;
foreach (var p in productsmorethan)
{
Console.WriteLine(++count + " " + p.ProductId + " " + p.Name + " " + p.StandardCost + " " + p.AverageListPrice);
}
#endregion
#region module 6 lab 4
Console.WriteLine("Products having Standard Cost greater than average selling price");
var productsgroupby = context.Products.GroupJoin(context.SalesOrderDetails, a => a.ProductID, b => b.ProductID, (a, b) => new { ProductId = a.ProductID, Name = a.Name, StandardCost = a.StandardCost, ListPrice = a.ListPrice, AverageListPrice = b.Average(c => c.UnitPrice) }).Where(a => a.StandardCost > a.AverageListPrice);
foreach (var p in productsgroupby)
{
Console.WriteLine(++count + " " + p.ProductId + " " + p.Name + " " + p.StandardCost + " " + p.AverageListPrice);
}
#endregion
#region module 6 lab 2-1
Console.WriteLine("Customer info for all salesorders");
foreach (var c in context.SalesOrderHeaders)
{
var udf = (from s in context.SalesOrderHeaders
join d in context.ufnGetCustomerInformation(c.CustomerID)
on s.CustomerID equals d.CustomerID
orderby s.SalesOrderID
select new
{
s.SalesOrderID,
d.CustomerID,
d.FirstName,
d.LastName,
s.TotalDue
}).ToList();
foreach (var u in udf)
{
Console.WriteLine(u.CustomerID + " " + u.SalesOrderID + " " + u.FirstName + " " + u.LastName + " " + u.TotalDue);
}
}
#endregion
#region module 6 lab 2-2
Console.WriteLine("Customer info for all salesorders");
//foreach (var c in context.Customers)
//{
// var udf2 = (from a in context.Addresses
// join ca in context.CustomerAddresses
// on a.AddressID equals ca.AddressID
// orderby ca.CustomerID
// select new
// {
// CustomerId = context.ufnGetCustomerInformation(c.CustomerID),
// FirstName = context.ufnGetCustomerInformation(c.CustomerID)
// a.AddressLine1,
// a.City
// }).ToList();
// foreach (var u in udf2)
// {
// Console.WriteLine(u.CustomerId + " " + u.FirstName + " " + u.LastName + " " + u.AddressLine1 + " " + u.City);
// }
//}
#endregion
var productslessthan = from p in context.Products
join s in context.SalesOrderDetails
on p.ProductID equals s.ProductID into grp
from g in grp
where p.StandardCost > grp.Average(a => a.UnitPrice)
select new
{
p.ProductID,
p.Name,
p.StandardCost,
p.ListPrice,
averagesellingprice = grp.Average(a => a.UnitPrice)
};
foreach (var p in productslessthan)
{
Console.WriteLine(p.ProductID + " " + p.Name + " " + p.StandardCost + " ");
}
#region module 7 lab 1-1
Console.WriteLine("Product with Product Model Summary");
var productmodelcatalogdescription = context.Products.Join(context.vProductModelCatalogDescriptions, a => a.ProductModelID, b => b.ProductModelID, (a, b) => new { ProductId = a.ProductID, Name = a.Name, ModelName = b.Name, Summary = b.Summary });
foreach (var p in productmodelcatalogdescription)
{
Console.WriteLine(p.ProductId + " " + p.Name + " " + p.ModelName + " " + p.Summary);
}
#endregion
#region module 7 lab 1-2
#endregion
#region everything else
// customers along with orders and product - query syntax
var customerlist = from c in context.Customers
join d in context.SalesOrderHeaders
on c.CustomerID equals d.CustomerID
join e in context.SalesOrderDetails
on d.SalesOrderID equals e.SalesOrderID
select new
{
FirstName = c.FirstName,
SalesOrderId = d.SalesOrderID,
ProductId = e.ProductID
};
foreach (var customer in customerlist)
{
Console.WriteLine(customer.FirstName + "\t" + customer.SalesOrderId + "\t" + customer.ProductId + "\n");
}
// customers along with orders and product - method syntax
var customermethodsyntax = context.Customers
.Join(context.SalesOrderHeaders, a => a.CustomerID, b => b.CustomerID, (a, b) => new { FirstName = a.FirstName, SalesOrderId = b.SalesOrderID })
.Join(context.SalesOrderDetails, a => a.SalesOrderId, b => b.SalesOrderID, (a, b) => new { FirstName = a.FirstName, SalesOrderId = b.SalesOrderID, ProductId = b.ProductID });
foreach (var customer in customermethodsyntax)
{
Console.WriteLine(customer.FirstName + "\t" + customer.SalesOrderId + "\t" + customer.ProductId + "\n");
}
// salesorderheader with salesorderdetails query syntax
var salesorderheaders = from sh in context.SalesOrderHeaders
join sd in context.SalesOrderDetails
on sh.SalesOrderID equals sd.SalesOrderID
select new
{
SalesOrderNumber = sh.SalesOrderNumber,
productId = sd.ProductID
};
foreach (var sh in salesorderheaders)
{
Console.WriteLine(sh.SalesOrderNumber + ":" + sh.productId + "\n");
}
// salesorderheader with salesorderdetails method syntax
// salesorderheader with salesorderdetails - group join using 'into'
var salesorderheadergroup = from sh in context.SalesOrderHeaders
join sd in context.SalesOrderDetails
on sh.SalesOrderID equals sd.SalesOrderID into sdj
from s in sdj
select new
{
SalesOrderNumber = sh.SalesOrderNumber,
Products = sdj
};
foreach (var sh in salesorderheadergroup)
{
Console.WriteLine("SalesOrderNumber" + sh.SalesOrderNumber + ":");
foreach (var salesorderdetail in sh.Products)
{
Console.WriteLine("\t SalesOrderProductId" + salesorderdetail.ProductID);
}
}
//customers with salesorders groupjoin
var customerordergroup = context.SalesOrderHeaders.GroupJoin(context.SalesOrderDetails, a => a.SalesOrderID, b => b.SalesOrderID, (a, b) => new { CustomerId = a.SalesOrderNumber, salescount = b.Count(), SalesOrderDetai = b }).Where(a => a.salescount > 0);
foreach (var customerorder in customerordergroup)
{
Console.WriteLine(customerorder.CustomerId + " " + customerorder.salescount);
foreach (var salesorder in customerorder.SalesOrderDetai)
{
Console.WriteLine("\t" + salesorder.ProductID);
}
}
// products per productmodel group by using query syntax
var productmodelperproductquerysyntax = (from c in context.Products
group c by c.ProductModelID into cpm
select new { ProductModelId = cpm.Key, Products = cpm }).Take(1);
foreach (var model in productmodelperproductquerysyntax)
{
Console.WriteLine("Product model :" + model.ProductModelId + " Count :" + model.Products.Count());
foreach (var product in model.Products)
{
Console.WriteLine(" - " + product.Name);
}
}
// products per productmodel group by using method syntax
var productmodelperproduct = context.Products.GroupBy(a => a.ProductModelID).Take(1);
foreach (var model in productmodelperproduct)
{
Console.WriteLine("Product model :" + model.Key + " Count :" + model.Count());
foreach (var product in model)
{
Console.WriteLine(" - " + product.Name);
}
}
// grouped join query syntax
var groupsalesorderheaders = from sh in context.SalesOrderHeaders
join sd in context.SalesOrderDetails
on sh.SalesOrderID equals sd.SalesOrderID into sdj
orderby sh.SalesOrderNumber descending
select new
{
SalesOrderNumber = sh.SalesOrderNumber,
p = from s in sdj
orderby s.ProductID descending
select s
};
foreach (var sh in groupsalesorderheaders)
{
Console.WriteLine(sh.SalesOrderNumber + ":" + "\n");
foreach (var pi in sh.p)
{
Console.WriteLine("\t" + pi.ProductID + "\n");
}
}
//grouped join method syntax
// customers with no orders
var groupcustomers = from c in context.Customers
join s in context.SalesOrderHeaders
on c.CustomerID equals s.CustomerID into sdj
from s in sdj.DefaultIfEmpty()
where s == null
select new
{
CustomerId = c.CustomerID,
SalesOrderHeader = s != null ? s.SalesOrderNumber : string.Empty
};
foreach (var gc in groupcustomers)
{
Console.WriteLine(gc.CustomerId + ":" + gc.SalesOrderHeader);
}
// customers with no address
var customerwithoutaddress = from c in context.Customers
join ca in context.CustomerAddresses
on c.CustomerID equals ca.CustomerID into cca
from ccai in cca.DefaultIfEmpty()
where ccai == null
select new
{
CustomerId = c.CustomerID,
};
count = 1;
foreach (var gc in customerwithoutaddress)
{
Console.WriteLine(count.ToString() + ":" + gc.CustomerId);
count += 1;
}
// grouping of product as per productmodel
var productmodel = (from p in context.Products
group p by p.ProductModelID into pm
select new
{
productmodelid = pm.Key,
averagelistprice = pm.Average(a => a.ListPrice),
productidcount = pm.Count(),
standardcost = pm.Max(a => a.StandardCost)
}).Take(5);
foreach (var gc in productmodel)
{
Console.WriteLine(gc.productmodelid + " " + gc.averagelistprice + " " + gc.productidcount + " " + gc.standardcost);
}
var products = context.Products;
Decimal averageListPrice =
products.Average(product => product.ListPrice);
Console.WriteLine("The average list price of all the products is ${0}",
averageListPrice);
// Raw SQL Queries
#endregion
}
}
public static async Task <List <Customer> > ReturnCustomerAsync()
{
var context = new AdventureWorksEntities();
return(await context.Customers.ToListAsync());
}
