What is
Threading ?
Threading
means parallel code execution.
There are two
types of thread.
1)
Foreground thread 2) Background thread
Lets see a
simple example without any threading.
class Program
{
static void Main(string[] args)
{
Function1();
Function2();
Console.ReadLine();
}
static void
Function1()
{
for (int i = 0; i
< 10; i++)
{
Console.WriteLine("Runing from Func 1: {0}", i);
}
}
static void
Function2()
{
for (int i = 0; i
< 10; i++)
{
Console.WriteLine("Runing from Func 2: {0}", i);
}
}
}
Output:
We can see,
Its executing Function 1 first and then Function 2. Its a synchronous process.
One by one functions are running.
Now Lets see
with Threading.
First import
System.Threading namespace
Using
System.Threading ;
class Program
{
static void Main(string[] args)
{
//Created two threads
Thread obj1 = new Thread(Function1);
Thread obj2 = new Thread(Function2);
//Invoke these threads
obj1.Start();
obj2.Start();
Console.ReadLine();
}
static void
Function1()
{
for (int i = 0; i
< 10; i++)
{
Console.WriteLine("Runing from Func 1: {0}", i);
Thread.Sleep(500);
}
}
static void
Function2()
{
for (int i = 0; i
< 10; i++)
{
Console.WriteLine("Runing from Func 2: {0}", i);
Thread.Sleep(500);
}
}
}
As we can
clearly see, both the threads running simultaneously.
Note* In reality Processor execute one
thread for some time, and then execute another thread for some time, It happens
so quickly that it appears that execution is happening simultaneously.
Two Kinds of Thread
1) Foreground Thread: Its a thread
which keeps running till its execution is completed, Although main thread
execution finished.
2) Background Thread: Its a thread
which stops executing whenever main thread stops.
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