public void OfType()
{
var query = fruits.OfType <string>();
foreach (string str in query)
{
Console.WriteLine(str);
}
}
public static int[] FilterArray(object[] arr)
{
System.Collections.ArrayList list = new System.Collections.ArrayList(arr.Length);
for (int i = 0; i < arr.Length; i++)
{
list.Add(arr[i]);
}
IEnumerable <int> query1 = list.OfType <int>();
return(query1.ToArray());
}
static void c()
{
System.Collections.ArrayList items = new System.Collections.ArrayList(4);
items.Add("Shoes");
items.Add("Clothes");
items.Add(15.5); // kiểu số
// Áp dụng OfType() vào ArrayList để tìm các phần tử là kiểu chuỗi
IEnumerable <string> query1 = items.OfType <string>();
// Xuất danh sách các phần tử kiểu chuỗi trong 1 ArrayList
foreach (string item in query1)
{
Console.WriteLine(item);
}
}
static void Main(string[] args)
{
System.Collections.ArrayList fruits = new System.Collections.ArrayList(4);
fruits.Add("Mango");
fruits.Add("Orange");
fruits.Add("Apple");
fruits.Add(3.0);
fruits.Add("Banana");
fruits.Add(new Stock());
// Apply OfType() to the ArrayList.
var query1 = fruits.OfType<Stock>();
Console.WriteLine("Elements of type 'stock' are:");
foreach (var fruit in query1)
{
Console.WriteLine(fruit);
}
}
private void Method()
{
var myArrayList = new System.Collections.ArrayList
{
System.Drawing.Color.Red,
new System.Drawing.Point(0, 0),
System.Drawing.Color.Green,
new System.Drawing.Point(10, 20),
System.Drawing.Color.Blue,
new System.Drawing.Point(20, 30)
};
var query1 = myArrayList.OfType <System.Drawing.Color>().Select(color => color);
foreach (var currentResult in query1)
{
Console.WriteLine(currentResult.Name);
}
var procesArray = new System.Collections.ArrayList();
var query = procesArray.Cast <System.Diagnostics.Process>().Select(process => process);
}
public void TestLinqOfType()
{
var connectionString = _connectionString + "StoreName=" + Guid.NewGuid();
var context = new MyEntityContext(connectionString);
var entity1 = context.Entities.Create();
entity1.SomeString = "An entity";
var animal1 = context.Animals.Create();
animal1.Name = "Mutley";
var person1 = context.Persons.Create();
person1.Name = "Jen Williams";
var company1 = context.Companies.Create();
company1.Name = "Networked Planet";
var person2 = context.Persons.Create();
person2.Name = "Kal Ahmed";
var entity2 = context.Entities.Create();
entity2.SomeString = "Another entity";
context.SaveChanges();
Assert.AreEqual(2, context.Persons.Count());
Assert.AreEqual(2, context.Entities.Count());
Assert.AreEqual(1, context.Companies.Count());
Assert.AreEqual(1, context.Animals.Count());
var arrayList = new System.Collections.ArrayList(5) {entity1, animal1, person1, company1, person2, entity2};
var entities = arrayList.OfType<Entity>();
Assert.AreEqual(2, entities.Count());
}
void ParseTelnet(StringBuilder sb)
{
while (telnet.Available > 0)
{
int input = telnet.GetStream().ReadByte();
System.Collections.ArrayList buffer = new System.Collections.ArrayList();
byte[] bytestosend;
switch (input)
{
case -1:
break;
case (int)Verbs.IAC: //interpret as command
int inputverb = telnet.GetStream().ReadByte();
if (inputverb == -1)
{
break;
}
switch (inputverb)
{
case (int)Verbs.IAC:
sb.Append(inputverb);
break;
case (int)Verbs.DO:
int inputoption = telnet.GetStream().ReadByte();
if (inputoption == -1)
{
break;
}
switch (inputoption)
{
case (int)SubCommand.TermType:
buffer.Add((byte)Verbs.IAC);
buffer.Add((byte)Verbs.WONT);
buffer.Add((byte)SubCommand.TermType);
bytestosend = buffer.OfType <byte>().ToArray();
telnet.GetStream().Write(bytestosend, 0, bytestosend.Length);
buffer.Clear();
break;
case (int)SubCommand.TermSpeed:
buffer.Add((byte)Verbs.IAC);
buffer.Add((byte)Verbs.WONT);
buffer.Add((byte)SubCommand.TermSpeed);
bytestosend = buffer.OfType <byte>().ToArray();
telnet.GetStream().Write(bytestosend, 0, bytestosend.Length);
buffer.Clear();
break;
case (int)SubCommand.XDisplay:
buffer.Add((byte)Verbs.IAC);
buffer.Add((byte)Verbs.WONT);
buffer.Add((byte)SubCommand.XDisplay);
bytestosend = buffer.OfType <byte>().ToArray();
telnet.GetStream().Write(bytestosend, 0, bytestosend.Length);
buffer.Clear();
break;
case (int)SubCommand.EnvirOption:
buffer.Add((byte)Verbs.IAC);
buffer.Add((byte)Verbs.WONT);
buffer.Add((byte)SubCommand.EnvirOption);
bytestosend = buffer.OfType <byte>().ToArray();
telnet.GetStream().Write(bytestosend, 0, bytestosend.Length);
buffer.Clear();
break;
case (int)SubCommand.Echo:
buffer.Add((byte)Verbs.IAC);
buffer.Add((byte)Verbs.WONT);
buffer.Add((byte)SubCommand.Echo);
bytestosend = buffer.OfType <byte>().ToArray();
telnet.GetStream().Write(bytestosend, 0, bytestosend.Length);
buffer.Clear();
break;
case (int)SubCommand.WinSize:
buffer.Add((byte)Verbs.IAC);
buffer.Add((byte)Verbs.WILL);
buffer.Add((byte)SubCommand.WinSize);
buffer.Add((byte)Verbs.IAC);
buffer.Add((byte)Verbs.SNEG);
buffer.Add((byte)SubCommand.WinSize);
buffer.Add((byte)0);
buffer.Add((byte)179);
buffer.Add((byte)0);
buffer.Add((byte)54);
buffer.Add((byte)Verbs.IAC);
buffer.Add((byte)Verbs.ENDSNEG);
bytestosend = buffer.OfType <byte>().ToArray();
telnet.GetStream().Write(bytestosend, 0, bytestosend.Length);
buffer.Clear();
break;
case (int)SubCommand.RFC:
buffer.Add((byte)Verbs.IAC);
buffer.Add((byte)Verbs.WILL);
buffer.Add((byte)SubCommand.RFC);
bytestosend = buffer.OfType <byte>().ToArray();
telnet.GetStream().Write(bytestosend, 0, bytestosend.Length);
buffer.Clear();
break;
}
break;
case (int)Verbs.WILL:
inputoption = telnet.GetStream().ReadByte();
if (inputoption == -1)
{
break;
}
switch (inputoption)
{
case (int)SubCommand.SGA:
buffer.Add((byte)Verbs.IAC);
buffer.Add((byte)Verbs.DO);
buffer.Add((byte)SubCommand.SGA);
bytestosend = buffer.OfType <byte>().ToArray();
telnet.GetStream().Write(bytestosend, 0, bytestosend.Length);
buffer.Clear();
break;
case (int)SubCommand.Status:
buffer.Add((byte)Verbs.IAC);
buffer.Add((byte)Verbs.DONT);
buffer.Add((byte)SubCommand.Status);
bytestosend = buffer.OfType <byte>().ToArray();
telnet.GetStream().Write(bytestosend, 0, bytestosend.Length);
buffer.Clear();
break;
case (int)SubCommand.Echo:
buffer.Add((byte)Verbs.IAC);
buffer.Add((byte)Verbs.DO);
buffer.Add((byte)SubCommand.Echo);
bytestosend = buffer.OfType <byte>().ToArray();
telnet.GetStream().Write(bytestosend, 0, bytestosend.Length);
buffer.Clear();
break;
}
break;
case (int)Verbs.SNEG:
inputoption = telnet.GetStream().ReadByte();
if (inputoption == -1)
{
break;
}
if (inputoption == (int)SubCommand.RFC)
{
int status = telnet.GetStream().ReadByte();
if (status == 1)
{
if (telnet.Available > 0)
{
break;
}
do
{
Thread.Sleep(100);
}while (telnet.Available <= 0);
}
}
break;
case (int)Verbs.ENDSNEG:
inputoption = telnet.GetStream().ReadByte();
break;
}
break;
default:
sb.Append((char)input);
break;
}
}
}
