public void TestUnion()
{
const int resultRowCount = 5;
// create QueryDesigner with ElementType == Products
var queryDesinger = new QueryDesigner(context, typeof(Products));
//create root node which elementType has the same type in queryDesigner
var root = new JoinNode(typeof(Products));
// create child node Categories with propertyName "Products".
// Because Categories linked with Products by next property:
// public EntitySet<Products> Products
var categoryNode = new JoinNode(typeof(Categories), "Category", "Products");
// add categoryNode to root node
root.AddChildren(categoryNode);
// create filter by Products.ProductName like "%l%"
var productNameCondition = new Condition("ProductName", "l", ConditionOperator.Like);
root.AddConditions(productNameCondition);
// create filter by Categories.Description like "Sweet%"
var categoryNameCondition = new Condition("Description", "Sweet", ConditionOperator.StartsWith, typeof(Categories));
categoryNode.AddConditions(categoryNameCondition);
// create ordering, because we call Skip and Take method.
Ordering order = new Ordering("ProductName");
// make join Products table with Categories filtered by conditions
// and ordered by already created ordering
queryDesinger.Join(root, new OrderingList(order));
QueryDesigner cloneQueryDesigner = (QueryDesigner)queryDesinger.Clone();
queryDesinger.Skip(0).Take(3);
cloneQueryDesigner.Skip(2).Take(4);
queryDesinger.Union(cloneQueryDesigner);
var list = new List<Products>(queryDesinger.Cast<Products>());
Assert.AreEqual(resultRowCount, list.Count);
}
public void TestLeftOuterJoin()
{
// var res = (from product in context.Products
// orderby product.ProductID
// select new { product, Order_Details = product.Order_Details.Where(p => p.Quantity > 120), Order_Detail = product.Suppliers });
// var resutl = res.ToList();
//// var res = (from categories in context.Categories
//// orderby categories.CategoryID
//// select new { categories, Products = categories.Products.Where(p => p.ProductName.Contains("l")).Select(p=>p.Order_Details) });
//// var resutl = res.ToList();
//
// foreach (var list1 in resutl)
// {
// var value = list1.product.Order_Details.FirstOrDefault();
// if (value != null)
// {
// Console.WriteLine(value.Quantity);
// }
// }
const int quantity = 120;
var root = new JoinNode(typeof(Products));
var orderDetailNode = new JoinNode(typeof(Order_Details), "Order_Details", "Product", JoinType.LeftOuterJoin);
root.AddChildren(orderDetailNode);
// add condition for filtering by CategoryName == "Condiments"
orderDetailNode.AddConditions(new Condition("Quantity", quantity, ConditionOperator.GreaterThan));
var supplierNode = new JoinNode(typeof(Suppliers), "Suppliers", "Products", JoinType.LeftOuterJoin);
root.AddChildren(supplierNode);
var orderNode = new JoinNode(typeof(Orders), "Orders", "Order_Details", JoinType.LeftOuterJoin);
orderDetailNode.AddChildren(orderNode);
var queryDesinger = new QueryDesigner(context, root);
var query = queryDesinger;
foreach (Products value in query)
{
var orderDetails = value.Order_Details.FirstOrDefault();
if (orderDetails != null)
{
Console.WriteLine(orderDetails.Quantity + " " + orderDetails.Orders.ShipName);
}
}
}
public void TestJoinWithOneChildAndFilteredByProductNameAndCategoryNameV2()
{
const string productName = "Louisiana";
const string categoryName = "Condiments";
const int resultRowCount = 2;
//create root node
var root = new JoinNode(typeof(Products));
// add condition for filtering by ProductName Like "Louisiana%"
root.AddConditions(new Condition("ProductName", productName, ConditionOperator.StartsWith));
// add child node Categories with propertyName "Products".
// Because Categories linked with Products by next property:
// public EntitySet<Products> Products
var categoryNode = new JoinNode(typeof(Categories), "Category", "Products");
root.AddChildren(categoryNode);
// add condition for filtering by CategoryName == "Condiments"
categoryNode.AddConditions(new Condition("CategoryName", categoryName));
var queryDesinger = new QueryDesigner(context, root);
var list = new List<Products>(queryDesinger.Cast<Products>());
Assert.AreEqual(resultRowCount, list.Count);
string query =
@"SELECT ProductID FROM Products INNER JOIN Categories ON Products.CategoryID = Categories.CategoryID
WHERE Products.ProductName like N'Louisiana%' AND Categories.CategoryName = N'Condiments'";
CheckDataWithExecuteReaderResult(query, resultRowCount, list);
}
public void TestFirstOrDefault()
{
// create QueryDesigner with ElementType == Products
var queryDesinger = new QueryDesigner(context, typeof(Products));
//create root node which elementType has the same type in queryDesigner
var root = new JoinNode(typeof(Products));
// create child node Categories with propertyName "Products".
// Because Categories linked with Products by next property:
// public EntitySet<Products> Products
var categoryNode = new JoinNode(typeof(Categories), "Category", "Products");
// add categoryNode to root node
root.AddChildren(categoryNode);
// create filter by Products.ProductName like "%l%"
var productNameCondition = new Condition("ProductName", "l", ConditionOperator.Like);
root.AddConditions(productNameCondition);
// create filter by Categories.Description like "Sweet%"
var categoryNameCondition = new Condition("Description", "Sweet", ConditionOperator.StartsWith, typeof(Categories));
categoryNode.AddConditions(categoryNameCondition);
// make join Products table with Categories filtered by conditions
// and ordered by already created ordering
queryDesinger.Join(root);
object first = queryDesinger.FirstOrDefault();
Assert.IsInstanceOfType(typeof(Products), first);
}
public void TestComplicatedLeftOuterJoin()
{
const int quantity = 120;
var root = new JoinNode(typeof(Customers));
var ordersNode = new JoinNode(typeof(Orders), "Orders", "Customers", JoinType.LeftOuterJoin);
root.AddChildren(ordersNode);
root.AddConditions(new Condition("Address", "Kirchgasse 6"));
var orderDetailNode = new JoinNode(typeof(Order_Details), "Order_Details", "Orders", JoinType.LeftOuterJoin);
orderDetailNode.AddConditions(new Condition("Quantity", quantity, ConditionOperator.GreaterThan));
ordersNode.AddChildren(orderDetailNode);
var productNode = new JoinNode(typeof(Products), "Products", "Order_Details", JoinType.LeftOuterJoin);
orderDetailNode.AddChildren(productNode);
var employeesNode = new JoinNode(typeof(Employees), "Employees", "Orders", JoinType.LeftOuterJoin);
ordersNode.AddChildren(employeesNode);
var shippersNode = new JoinNode(typeof(Shippers), "Shippers", "Orders", JoinType.LeftOuterJoin);
ordersNode.AddChildren(shippersNode);
var queryDesinger = new QueryDesigner(context, root);
var query = queryDesinger;
foreach (Customers value in query)
{
var orders = value.Orders.Where(o => o.Order_Details.Count > 0).FirstOrDefault();
if (orders != null)
{
Console.WriteLine("ShipName: " + orders.ShipName);
foreach (var orderDetail in orders.Order_Details)
{
Console.WriteLine("ProductName: " + orderDetail.Products.ProductName);
}
}
}
}
public void TestLeftOuterJoin()
{
var query = from orderDetail in context.Order_Details
join product in context.Products on orderDetail.Product equals product into gr
from grProduct in gr.DefaultIfEmpty()
where grProduct.ProductName == "some"
select new {orderDetail, pr = grProduct};
query.ToList();
var ordeDetailrNode = new JoinNode(typeof (Order_Detail));
var productNode = new JoinNode(typeof(Product), "Product", "Order_Details", JoinType.LeftOuterJoin);
productNode.AddConditions(new Condition("ProductName", "some"));
ordeDetailrNode.AddChildren(productNode);
var queryDesigner = new QueryDesigner(context, ordeDetailrNode).Cast<Order_Detail>().ToList();
// var dlo = new DataLoadOptions();
// dlo.AssociateWith<Category>(c => c.Products.Where(p => p.ProductName.Contains("l")));
// context.LoadOptions = dlo;
// var res1 = (from category in context.Categories
// select category);
// foreach (var re in res1)
// {
// Console.WriteLine(re.CategoryID + " " + re.Products.Count);
// }
// var res = (from product in context.Products
// orderby product.ProductID
// select new { product, product.Supplier,
// Order_Details = product.Order_Details.Where(p => p.Quantity > 120)
// .Select(od => new { Order_Detail = od, Order = od.Order })
// });
//
// var queryable = res.ToList();
// foreach (var list in queryable)
// {
// list.product.Order_Details.SetSource(list.Order_Details.Select(od=>od.Order_Detail));
//// foreach (var detail in list.Order_Details)
//// {
//// detail.Product = list.product;
//// }
// }
// foreach (var list in queryable)
// {
// var value = list.product.Order_Details.FirstOrDefault();
// if (value != null)
// {
// Console.WriteLine(value.Quantity + " " + value.Order.ShipCity);
// }
// }
// return;
// const int quantity = 120;
//
// var root = new JoinNode(typeof(Product));
// var orderDetailNode = new JoinNode(typeof(Order_Detail), "Order_Details", "Product", JoinType.LeftOuterJoin);
// root.AddChildren(orderDetailNode);
//
// // add condition for filtering by CategoryName == "Condiments"
// orderDetailNode.AddConditions(new Condition("Quantity", quantity, ConditionOperator.GreaterThan));
//
// var orderNode = new JoinNode(typeof (Order), "Order", "Order_Details", JoinType.LeftOuterJoin);
// orderDetailNode.AddChildren(orderNode);
//
// var supplierNode = new JoinNode(typeof(Supplier), "Supplier", "Products", JoinType.LeftOuterJoin);
//
// root.AddChildren(supplierNode);
//
// var queryDesinger = new QueryDesigner(context, root);
//
// var result = queryDesinger.Cast<Product>().ToList();
// foreach (Product list1 in result)
// {
//// Console.WriteLine(list1.product.Supplier.CompanyName);
//// if (list1.product.Order_Details.HasLoadedOrAssignedValues)
// {
// var value = list1.Order_Details.FirstOrDefault();
// if (value != null)
// {
// Console.WriteLine(value.Quantity + " " + value.Order.ShipCity);
// }
// }
// }
// var res = from categories in context.Categories
// join product in context.Products on categories equals product.Category into ppp
// from p in ppp.DefaultIfEmpty()
// where p.ProductName.Contains("l")
// select new { categories/*, Products = ppp.DefaultIfEmpty().Where(p => p.ProductName.Contains("l"))*/ };// new {categories, Products = categories.Products.Where(p => p.ProductName.Contains("l"))});}
// var resutl = res.ToList();
//
// foreach (var list1 in resutl)
// {
// Console.WriteLine(list1.categories.Products.Count);
// }
}