static void Main(string[] args)
{
Console.WriteLine("** C# CRUD sample with Entity Framework Core and SQL Server **\n");
try
{
// Build connection string
SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder();
builder.DataSource = "localhost"; // update me
builder.UserID = "sa"; // update me
builder.Password = "******"; // update me
builder.InitialCatalog = "EFSampleDB";
using (EFSampleContext context = new EFSampleContext(builder.ConnectionString))
{
context.Database.EnsureDeleted();
context.Database.EnsureCreated();
Console.WriteLine("Created database schema from C# classes.");
// Create demo: Create a User instance and save it to the database
User newUser = new User {
FirstName = "Anna", LastName = "Shrestinian"
};
context.Users.Add(newUser);
context.SaveChanges();
Console.WriteLine("\nCreated User: "******"Ship Helsinki", IsComplete = false, DueDate = DateTime.ParseExact("04-01-2017", "MM-dd-yyyy", CultureInfo.InvariantCulture)
};
context.Tasks.Add(newTask);
context.SaveChanges();
Console.WriteLine("\nCreated Task: " + newTask.ToString());
// Association demo: Assign task to user
newTask.AssignedTo = newUser;
context.SaveChanges();
Console.WriteLine("\nAssigned Task: '" + newTask.Title + "' to user '" + newUser.GetFullName() + "'");
// Read demo: find incomplete tasks assigned to user 'Anna'
Console.WriteLine("\nIncomplete tasks assigned to 'Anna':");
var query = from t in context.Tasks
where t.IsComplete == false &&
t.AssignedTo.FirstName.Equals("Anna")
select t;
foreach (var t in query)
{
Console.WriteLine(t.ToString());
}
// Update demo: change the 'dueDate' of a task
Task taskToUpdate = context.Tasks.First(); // get the first task
Console.WriteLine("\nUpdating task: " + taskToUpdate.ToString());
taskToUpdate.DueDate = DateTime.ParseExact("06-30-2016", "MM-dd-yyyy", CultureInfo.InvariantCulture);
context.SaveChanges();
Console.WriteLine("dueDate changed: " + taskToUpdate.ToString());
// Delete demo: delete all tasks with a dueDate in 2016
Console.WriteLine("\nDeleting all tasks with a dueDate in 2016");
DateTime dueDate2016 = DateTime.ParseExact("12-31-2016", "MM-dd-yyyy", CultureInfo.InvariantCulture);
query = from t in context.Tasks
where t.DueDate < dueDate2016
select t;
foreach (Task t in query)
{
Console.WriteLine("Deleting task: " + t.ToString());
context.Tasks.Remove(t);
}
context.SaveChanges();
// Show tasks after the 'Delete' operation - there should be 0 tasks
Console.WriteLine("\nTasks after delete:");
List <Task> tasksAfterDelete = (from t in context.Tasks select t).ToList <Task>();
if (tasksAfterDelete.Count == 0)
{
Console.WriteLine("[None]");
}
else
{
foreach (Task t in query)
{
Console.WriteLine(t.ToString());
}
}
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
Console.WriteLine("All done. Press any key to finish...");
Console.ReadKey(true);
}
static void Main(string[] args)
{
try
{
// Build connection string
SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder();
builder.DataSource = "localhost";
builder.InitialCatalog = "EFSample";
builder.IntegratedSecurity = true; // Windows Authentication
using (EFSampleContext context = new EFSampleContext(builder.ConnectionString))
{
Console.WriteLine("Created database schema from C# classes.");
// Create Deomo: Create a User instance and save it to the database
User newUser = new User {
FirstName = "Anna", LastName = "Shrestinian"
};
context.Users.Add(newUser);
context.SaveChanges();
Console.WriteLine("\nCreated User: "******"Ship Helsinki", IsComplete = false, DueDate = DateTime.Parse("04-01-2017")
};
context.Tasks.Add(newTask);
context.SaveChanges();
Console.WriteLine("\nCreated Task: " + newTask.ToString());
// Assosicate Demo: Assign task to user
newTask.AssignedTo = newUser;
context.SaveChanges();
Console.WriteLine("\nAssigned Task: '" + newTask.Title + "' to user '" + newUser.GetFullName() + "'");
Console.WriteLine("\nIncompleted tasks assinged to 'Anna'");
var query = from t in context.Tasks
where t.IsComplete == false &&
t.AssignedTo.FirstName.Equals("Anna")
select t;
foreach (var t in query)
{
Console.WriteLine(t.ToString());
}
// Update Demo: Change the 'dueDate' of a task
Task taskToUpdate = context.Tasks.First(); // get the first task
Console.WriteLine("\nUpdating task: " + taskToUpdate.ToString());
taskToUpdate.DueDate = DateTime.Parse("06-30-2016");
context.SaveChanges();
Console.WriteLine("dueDate changed: " + taskToUpdate.ToString());
// Delete Demo: delete all task with a dueDate in 2016
Console.WriteLine("\nDeleting all task with a dueDate in 2016");
DateTime dueDate2016 = DateTime.Parse("12-31-2016");
query = from t in context.Tasks
where t.DueDate < dueDate2016
select t;
foreach (Task t in query)
{
Console.WriteLine("Deleting task: " + t.ToString());
context.Tasks.Remove(t);
}
context.SaveChanges();
// Show tasks after the 'Delete' operation - there should be 0 tasks
Console.WriteLine("\nTask after delete:");
List <Task> tasksAfterDelete = (from t in context.Tasks select t).ToList <Task>();
if (tasksAfterDelete.Count == 0)
{
Console.WriteLine("[None]");
}
else
{
foreach (Task t in query)
{
Console.WriteLine(t.ToString());
}
}
}
}
catch (SqlException e)
{
Console.WriteLine(e.ToString());
}
Console.WriteLine("All done. Press any key to finish ... ");
Console.ReadKey(true);
}
