static void TryGenerateSampleData(SampleModel1Container container)
{
var projects = container.Projects.ToList();
if (projects.Count < 1)
{
var employee1 = new Employee()
{
Id = 1
};
var employee2 = new Employee()
{
Id = 2
};
container.Employees.AddOrUpdate(employee1, employee2);
container.Projects.AddOrUpdate(new Project()
{
Name = "Project 1",
Employee = employee1
}, new Project()
{
Name = "Project 2",
Employee = employee2
}, new Project()
{
Name = "Project A2",
Employee = employee2
}, new Project()
{
Name = "Project B2",
Employee = employee2
});
container.SaveChanges();
}
}
static void Main(string[] args)
{
using (var context = new SampleModel1Container())
{
TryGenerateSampleData(context);
IList<Project> list1 = new List<Project>();
IList<Project> list2 = new List<Project>()
{
new Project()
{
Id = 1
}
};
// Must read the data from db then using join
var total = context.Projects.AsEnumerable().Join(list2, p => p.Id, p => p.Id, (x, y) => new { X = x, Y = y });
var z = list1.Join(list2, p => p.Id, p => p.Id, (p1, p2) => new { });
var q = new ObjectQuery<Project>("SELECT VALUE p FROM Projects as p WHERE p.Id > @projectId",
((IObjectContextAdapter)context).ObjectContext);
var r = q.Select("it", new ObjectParameter("projectId", 0)).ToList();
// Create the query
var queryString = "SELECT VALUE p FROM Projects as p WHERE p.Id > @projectId";
var objectQuery = ((IObjectContextAdapter)context).ObjectContext.CreateQuery<Project>(queryString, new ObjectParameter("projectId", 0));
// Get all projects satified the query
var projects = objectQuery.ToList();
// Select only first item
var top1 = objectQuery.Top("1").FirstOrDefault();
// Skip and Top, it's different than Top and Skip
var top2 = objectQuery.Skip("it.Name DESC", "0").Top("1").ToList();
// Get two fields
var records = objectQuery.Select("it.Id, it.Name").Skip("it.Name", "2").Top("2");
foreach (var record in records)
{
Console.WriteLine("Id / Name: {0} / {1}", record["Id"], record["Name"]);
}
//
var results =
context.Projects.Where(p => p.Id > 0)
.Select(x => new { x.Id, x.Name })
.OrderByDescending(x => x.Name)
.Skip(2)
.Take(2)
.ToList();
var employees = context.Employees.ToList();
}
Console.ReadLine();
//EntityConnection con = new EntityConnection();
//SampleModel1Container c = new SampleModel1Container();
//c.Database.Connection.BeginTransaction();
//EntityCommand ec = new EntityCommand();
//ec.ExecuteScalarAsync();
//SqlCommand sc = new SqlCommand();
//sc.ExecuteReaderAsync();
//System.Data.OleDb.OleDbCommand oc = new OleDbCommand();
//oc.ExecuteReaderAsync();
}
