public void FirstOrDefault_ObservableSourceNewFirstItemAdded_Update()
{
var update = false;
var coll = new NotifyCollection <string>()
{
"23"
};
var collCasted = (INotifyCollection <string>)coll;
var test = Observable.Expression(() => collCasted.FirstOrDefault());
test.ValueChanged += (o, e) =>
{
update = true;
Assert.AreEqual("42", e.NewValue);
Assert.AreEqual("23", e.OldValue);
};
Assert.AreEqual("23", test.Value);
Assert.IsFalse(update);
coll.Insert(0, "42");
Assert.IsTrue(update);
Assert.AreEqual("42", test.Value);
}
public void FirstOrDefault_ObservableSourceFirstItemAdded_NoUpdateWhenDetached()
{
var update = false;
var coll = new NotifyCollection <string>();
var test = Observable.Expression(() => coll.FirstOrDefault());
test.ValueChanged += (o, e) => update = true;
Assert.IsNull(test.Value);
Assert.IsFalse(update);
test.Detach();
update = false;
coll.Add("42");
Assert.IsFalse(update);
test.Attach();
Assert.IsTrue(update);
Assert.AreEqual("42", test.Value);
update = false;
coll.Insert(0, "23");
Assert.IsTrue(update);
}
static void Main(string[] args)
{
NotifyCollection nc = new NotifyCollection();
nc.PropertyChanged += (s,e) =>
{
Console.WriteLine(e.PropertyName);
};
nc.Add(1);
nc.Add(2);
nc.Add(3);
nc.Insert(2, 2);
nc.Add(4);
nc.Remove(4);
}
static void Main ( string[] args )
{
Delegates del = new Delegates();
List<int> numbers = new List<int> { 5 , 4 , 8 , 7 , 9 , 6 , 6 , 6 , 3 , 1 , 20 };
List<int> evens = del.FilterCollection(numbers , IsEven);
foreach(var item in evens)
{
Console.Write(item + " ");
}
Console.WriteLine();
AverageAggregator aggregator = new AverageAggregator();
aggregator.AverageChanged += delegate ( object sender )
{
if(sender is AverageAggregator)
{
AverageAggregator newSender = (AverageAggregator)sender;
Console.WriteLine("Average has changed!\nNew value: {0}" , newSender.Average);
}
};
aggregator.AddNumber(6);
aggregator.AddNumber(4);
aggregator.AddNumber(2);
aggregator.AddNumber(3);
Student stu = new Student();
stu.PropertyChanged += PropChange;
stu.Name = "Anton";
stu.FacultyNumber = 65888;
stu.Grade = 5.58;
NotifyCollection<int> newList = new NotifyCollection<int>();
newList.PropertyChanged += (object sender, PropertyChangedEventArgs e)=>
{
Console.WriteLine("The list has changed!\n{0}" , e.PropertyName);
};
newList.Add(5);
newList.Add(12);
newList.Insert(1 , 20);
newList.Remove(12);
Console.ReadKey();
}
public void FirstOrDefault_ObservableSourceNewFirstItemAdded_Update()
{
var update = false;
var coll = new NotifyCollection<string>() { "23" };
var test = Observable.Expression(() => coll.FirstOrDefault());
test.ValueChanged += (o, e) =>
{
update = true;
Assert.AreEqual("42", e.NewValue);
Assert.AreEqual("23", e.OldValue);
};
Assert.AreEqual("23", test.Value);
Assert.IsFalse(update);
coll.Insert(0, "42");
Assert.IsTrue(update);
Assert.AreEqual("42", test.Value);
}
static void Main(string[] args)
{
Console.InputEncoding = Encoding.Unicode;
Console.OutputEncoding = Encoding.Unicode;
AverageAggregator averageAgg = new AverageAggregator
(delegate (object sender, decimal oldAverage, decimal newAverage)
{
Console.Write("--->Handler: ");
Console.WriteLine("Average changed from {0} to {1}.", oldAverage, newAverage);
});
Console.WriteLine("---AverageAggregator---");
Console.WriteLine();
Console.WriteLine("Adding number to aggregator: 2");
averageAgg.AddNumber(2);
Console.WriteLine("Adding number to aggregator: 2");
averageAgg.AddNumber(2);
Console.WriteLine("Adding number to aggregator: 8");
averageAgg.AddNumber(8);
Console.WriteLine("Adding number to aggregator: 4");
averageAgg.AddNumber(4);
Console.WriteLine("Adding number to aggregator: 4");
averageAgg.AddNumber(4);
Console.WriteLine("Adding number to aggregator: 4");
averageAgg.AddNumber(4);
Console.WriteLine("Adding number to aggregator: -24");
averageAgg.AddNumber(-24);
Console.WriteLine("Adding number to aggregator: 0");
averageAgg.AddNumber(0);
Console.WriteLine("Adding number to aggregator: 0");
averageAgg.AddNumber(0);
Console.WriteLine("Adding number to aggregator: 10");
averageAgg.AddNumber(10);
Console.WriteLine("Adding number to aggregator: 1");
averageAgg.AddNumber(1);
Console.WriteLine("Adding number to aggregator: 1");
averageAgg.AddNumber(1);
Console.WriteLine("Adding number to aggregator: 2");
averageAgg.AddNumber(2);
Console.WriteLine();
Console.WriteLine("---NotifyCollection---");
Console.WriteLine();
NotifyCollection<Book> notCol = new NotifyCollection<Book>
((sender, changeType, changedItemIndex, changedItemInfo) =>
{
Console.Write("--->Handler: ");
switch (changeType)
{
case ItemChangeType.Add:
Console.WriteLine("Added item to collection on {0} index!", changedItemIndex);
break;
case ItemChangeType.Insert:
Console.WriteLine("Inserted item in collection on {0} index!", changedItemIndex);
break;
case ItemChangeType.Remove:
if (changedItemIndex == -1) Console.WriteLine("Collection items cleared!");
else Console.WriteLine("Removed item from collection being on {0} index!", changedItemIndex);
break;
case ItemChangeType.Replace:
Console.WriteLine("Replaced item in collection being on {0} index!", changedItemIndex);
break;
case ItemChangeType.ChangedProperty:
Console.WriteLine("Item on {0} index property {1} changed!", changedItemIndex, changedItemInfo);
break;
default:
break;
}
});
Book book1 = new Book("author1", "book1", 2000);
Book book2 = new Book("author2", "book2", 2001);
Book book3 = new Book("author3", "book3", 2002);
Console.WriteLine("Adding {0}!", book1);
notCol.Add(book1);
Console.WriteLine("Adding {0}!", book2);
notCol.Add(book2);
Console.WriteLine("Inserting {0} on index 1!", book3);
notCol.Insert(1, book3);
Console.WriteLine("Changing {0} year to 2011!", book1);
book1.Year = 2011;
Console.WriteLine("Changing {0} year to 2005!", book3);
book3.Year = 2005;
Console.WriteLine("Removing {0}!", book2);
notCol.Remove(book2);
Console.WriteLine("Changing removed book year to 1995!");
book2.Year = 1995;
Console.WriteLine("Clearing all items!");
notCol.Clear();
Console.WriteLine("Adding {0}!", book1);
notCol.Add(book1);
Console.WriteLine("Adding {0}!", book2);
notCol.Add(book2);
Console.WriteLine("Replacing book on 0 index with {0}", book3);
notCol[0] = book3;
Console.WriteLine("Changing old book year to 1895!");
book1.Year = 1895;
Console.WriteLine("Changing new book year to 2003!");
book3.Year = 2003;
Console.WriteLine();
Console.WriteLine("---Network Buffer---");
ReceiveBuffer rec = new ReceiveBuffer(MessageReceivedHandle);
PacketGenerator pg = new PacketGenerator(rec);
Console.WriteLine("Write messages. Write exit for exit.");
Console.Write("Message to send: ");
string inputMessage = Console.ReadLine();
while(!inputMessage.Equals("exit"))
{
pg.SendMessage(inputMessage);
Console.Write("Message to send: ");
inputMessage = Console.ReadLine();
}
}
public void FirstOrDefault_ObservableSourceFirstItemAdded_NoUpdateWhenDetached()
{
var update = false;
var coll = new NotifyCollection<string>();
var test = Observable.Expression(() => coll.FirstOrDefault());
test.ValueChanged += (o, e) => update = true;
Assert.IsNull(test.Value);
Assert.IsFalse(update);
test.Detach();
update = false;
coll.Add("42");
Assert.IsFalse(update);
test.Attach();
Assert.IsTrue(update);
Assert.AreEqual("42", test.Value);
update = false;
coll.Insert(0, "23");
Assert.IsTrue(update);
}