static void Main(string[] args)
{
NorthwindDataContext context = new NorthwindDataContext();
//var result = from item in context.Categories
// where item.CategoryID == 48090
// select item;
var result = context.SelectCategory(48090);
foreach (var item in result)
{
Console.WriteLine("{0} {1}", item.CategoryID, item.CategoryName);
}
//context.DeferredLoadingEnabled = false;
var ldOptions = new DataLoadOptions();
ldOptions.AssociateWith<Category>((c) => (c.Products));
context.LoadOptions = ldOptions;
context.ObjectTrackingEnabled = false; // turns DeferredLoadingEnabled to false
var result1 = context.Categories.Where((prod) => (prod.CategoryID == 65985)).Single();
foreach (var item in result1.Products)
{
Console.WriteLine("{0} {1}",item.ProductID, item.ProductName);
}
Console.WriteLine();
Compile();
//Query2();
//DirectExe();
//Modify();
//Trans();
//MyDel();
//Track();
CreateDB();
Console.ReadLine();
}
static void Modify()
{
NorthwindDataContext context = new NorthwindDataContext();
var result = context.Categories.Where<Category>((cat) => (cat.CategoryID == 48090)).Single<Category>();
result.CategoryName = "Thurston";
context.SubmitChanges();
}
static void Compile()
{
NorthwindDataContext context = new NorthwindDataContext();
Console.WriteLine("Compiled Query");
foreach (var item in CompiledQueries.prodsIn(context))
{
Console.WriteLine("{0} {1} {2}", item.ProductID, item.ProductName, item.UnitPrice);
}
}
static void DirectExe()
{
Console.WriteLine();
Console.WriteLine("Direct Exe");
NorthwindDataContext context = new NorthwindDataContext();
var result = context.ExecuteQuery<Product>("select * from Products where CategoryID = 48090");
foreach (var item in result)
{
Console.WriteLine("{0} {1}", item.ProductID, item.ProductName);
}
}
static void Query2()
{
Console.WriteLine();
Console.WriteLine("Query2");
NorthwindDataContext context = new NorthwindDataContext();
var compQuery = CompiledQuery.Compile((NorthwindDataContext con) => (context.Categories.Where<Category>((cat) => (cat.CategoryID == 48090)).Single<Category>((cat) => (cat.CategoryID == 48090))));
var result = context.Categories.Where<Category>((cat) => (cat.CategoryID == 48090)).Single<Category>((cat) => (cat.CategoryID == 48090));
Console.WriteLine("{0} {1}", result.CategoryID, result.CategoryName);
Console.WriteLine("{0} {1}", compQuery(context).CategoryID, compQuery(context).CategoryName);
Console.WriteLine("{0} {1}", CompiledQueries.catsIn(context).CategoryID, CompiledQueries.catsIn(context).CategoryName);
}
static void MyDel()
{
NorthwindDataContext context = new NorthwindDataContext();
var result = (from item in context.Categories
where item.CategoryID == 48090
select item).Single<Category>();
context.Categories.DeleteOnSubmit(result);
context.Products.DeleteAllOnSubmit<Product>(result.Products);
context.SubmitChanges();
}
static void CreateDB()
{
NorthwindDataContext LinqDBDataContext = new NorthwindDataContext(@"Data Source=.\sqlexpress; Integrated Security=SSPI; Initial Catalog=LinqDB");
LinqDBDataContext.CreateDatabase();
}
static void Trans()
{
using(var trans = new TransactionScope())
{
try
{
NorthwindDataContext context = new NorthwindDataContext();
var category78210 = context.Categories.Where<Category>((cat) => (cat.CategoryID == 78210)).Single<Category>();
Product p1 = new Product() { CategoryID = 78210, ProductID = 92618, ProductName = "Clock", UnitPrice = 1000, UnitsInStock = 12 };
category78210.Products.Add(p1);
trans.Complete();
}
catch (Exception)
{
Console.WriteLine("Not Complete");
}
};
}
static void Track()
{
NorthwindDataContext context = new NorthwindDataContext();
var result = (from item in context.Categories
where item.CategoryID == 65985
select item).Single<Category>();
result.CategoryName = "Malini";
var changeSet = context.GetChangeSet();
Console.WriteLine("Update Changes: {0}", changeSet.Updates.Count());
ModifiedMemberInfo[] member = context.Categories.GetModifiedMembers(result);
foreach (var item in member)
{
Console.WriteLine("Modified Member: {0}, Org: {1}, Curr: {2}", item.Member.Name, item.OriginalValue, item.CurrentValue);
}
}
