How do I wait for a thread to complete and then exicute remaining code

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How do I wait for a thread to complete and then exicute remaining code.

C#

class2 objClass2 = new class2();// (In Class2 cunstructor I have thread)
class3  objclass3  = new class3();//This line should execute only after the execution of Class2 thread

Please help

Posted 3-Jan-12 1:08am

vivektp

Updated 3-Jan-12 1:34am

lukeer

v2

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Pankaj Chamria · Accepted Answer · 2012-01-03T02:40:00

I think you should not have threads in your constructor. You should consider re-factoring your code design.

However to solve your problem one thing you can do is -

Use ManualResetEvents.

So your code would look something like this -

private static ManualResetEvent mre = new ManualResetEvent(false);

/* Somehow you need to make mre accessible to the piece of code which can decide that the Thread 1 has finished its execution. There you would do a mre.Reset() */

mre.Set();
class2 objClass2 = new class2(mre);// (In Class2 cunstructor I have thread)

mre.WaitOne();
class3  objclass3  = new class3();//This line should execute only after the execution of Class2 thread

Thanks,
Pankaj Chamria

lukeer · Accepted Answer · 2012-01-03T01:37:00

Solution 1

First you should think of removing the extra thread in the constructor of class2.

If that's not possible, have a look at the Thread.Join()[^] method. It is designed to make one thread to wait for another one to exit. Use it in the constructor of class2.

Posted 3-Jan-12 1:37am

lukeer

Updated 3-Jan-12 1:38am

v2

Comments

BobJanova 3-Jan-12 8:53am

Exactly right. Thread.Join will do what the question asks, but this definitely looks like a bad piece of design.

JacquesDP · Accepted Answer · 2012-01-03T02:35:00

Solution 2

You can also look at initiating Class3 at the end of the thread of Class2, if that is not possible you can also look at thread locking and using the Mutex object.

lock Statement[^]

Look at example 4 for the use of the Mutex object.
Mutex object[^]

Posted 3-Jan-12 2:35am

JacquesDP